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These AP 8th Class Social Studies Important Questions 1st Lesson Reading and Analysis of Maps will help students prepare well for the exams.

AP State Syllabus 8th Class Social 1st Lesson Important Questions and Answers Reading and Analysis of Maps

Question 1.
Do you think the free access to maps is a good thing?
Answer:
No, I do not think so. Any government has to maintain secrecy in access to maps. Otherwise, it helps the enemies. But at present satellite images reveal every place on the earth.

Question 2.
What is meant by the Relief feature?
Answer:
Relief feature means the high and low places on the surface of the earth.

Question 3.
Who were the Portuguese explorers?
Answer:
Magellan, Vasco-da-Gama and Bartholomeu Dias were the Portuguese explorers.

Question 4.
What do you know about Marcopolo?
Answer:
Marcopolo was an Italian explorer. He explored China and Asia.

Question 5.
Why do you think maps are useful to armies in times of war?
Answer:
Maps were also in great demand during times of war as armies and airforces needed them.
They use strategy maps to illustrate an organization’s vision, mission, overarching strategies and key goals and initiatives.

Question 6.
Why were the Greeks and the Romans greatly interested in making maps?
Answer:
The Greeks and after them the Romans were greatly interested in making maps and knowing about places near and far. They wanted to conquer the world, build colonies in far off places and trade with them. e.g.: Alexander, the Greek king.

Question 7.
What is aerial photography?
Answer:

Aerial photography is the technique of taking of photographs of the ground from an elevated position, using aircrafts, helicopters, hot air balloons etc.
Aerial photographs are not maps.

Question 8.
What are satellite imagery?
Answer:
Satellite imageries are the photographs of the earth taken by the artificial satellites launched into the space. These are used in many ways: map making, planning, meteorology, forestry, warfare etc.

Question 9.
Write the difference between maps and photographs.
Answer:
Maps:
A map is used by geographers to show features that we consider important.
(Or)
A map actually is a model of a place giving those features that the map maker considers to be of importance.
Photographs:
A photograph may not be able to show you the features of a place like a map.

Question 10.
Name the early map makers.
Answer:
The Sumerians, the Babylonians, the Greeks, the Arabs, the Chinese, the Europeans were the early map makers.

Question 11.
How can we read Thematic maps?
Answer:

1. A map which focuses on only one aspect is called “Thematic Map”,
   e.g.: Political Maps, Physical Maps etc.
2. We should have the knowledge of different kinds of symbols, colours and patterns which are used on thematic maps.
   e.g.: Dark Grey – Mountain Black – Boundary.
3. Then only we can read Thematic maps.

Question 12.
What are main relief features on the earth?
Answer:

1. Relief feature means the high and low places on the surface of the earth.
2. The main relief features are: hills, valleys, plateaus, plains, river basins, rocky and sandy places.

Question 13.
What are called Isolines?
Answer:
The lines which join the places with some common features are called Isolines or Contour lines.

Question 14.
What are the uses of contour lines?
Answer:
Contour lines give an indication of the slope of the land as well as the elevation above sea level.

Question 15.
How did Mt. Everest get its name?
Answer:
In 1802 William Lambton began one of the most important geographical surveys in the world starting from Chennai in the south and culminating in the Himalayas to determine the length of longitude and also the heights of various places. This survey was completed by Sir George Everest. It is this survey that established that Mt. Everest is the highest peak in the world. It was named after George Everest.

Question 16.
What are conventional symbols?
Answer:
The symbols which are used by map makers conventionally are called conventional symbols.

Question 17.
Observe the given picture and write your comment.

Answer:
This was a model of the world according to the Bible. It is surrounded by oceans and is divided into three continents – Asia, Europe and Africa.
Of these, Asia was considered the largest and the most important as it had Jerusalem which was the birthplace of Jesus Christ. It is therefore also shown on the top.

Question 18.
Statement:
“All the important features can be shown on a map. So people make different kinds of maps”.
* Read this statement and prepare a question on it.
Answer:
“Why do people make different kinds of maps?”

Question 19.
Why were the Greeks and the Romans greatly interested in making maps?
Answer:
The Greeks and after them the Romans were greatly interested in making maps and knowing about places near and far. They wanted to conquer the world, build colonies in far off places and trade with them.
e.g.: Alexander, the Greek king.

Question 20.
Why do you think that in Idrisi’s map the top side points to the south while in the maps prepared by the Greeks it pointed to the north?
Answer:
In many issues Islamic traditions are different with the rest of the world’s, e.g.: Script.
In the similar way the top side points to the south in Idrisi’s map.
(Or)
While facing towards east, he would have given importance to the right hand side (south) and showed it on the top side of the map.

Question 21.
Appreciate the Babylonian clay tablet world map.
Answer:
The Babylonian clay tablet was dated from the Persian period. It was flat and round. The inner circle had all the places they knew about. The city of Babylon was shown in the middle. Beyond the inner circle was ‘Bitter river, or ‘Salt water ocean’ in which were seven triangular islands.
Their thought, imagination, map making ability were really appreciable.

Question 22.
Who invented the latitudes and longitudes and the grid system?
Answer:
Hipparchus (190-120 B.C.) was perhaps the greatest of the Greek astronomers. He devised a method of locating geographical positions by means of latitudes and longitudes. Ptolemy also was a Greek astronomer and mathematician. He lived and worked in Egypt. His work which employed a system of latitudes and longitudes, influenced map makers for hundreds of years. He evolved the science of map-making.

Question 23.
Write the biography of Al Idrisi. (in a few lines)
Answer:

Ash – Sharif Al Idrisi was born in 1099. He was a Muslim geographer, cartographer, Egyptologist and traveller. He lived in Sicily, at the Court of King Roger – II. He spent much of his early life travelling through North Africa and Spain.
Al Idrisi incorporated the knowledge of Africa, the Indian Ocean and the far east gathered by Islamic merchants and explorers and recorded on Islamic maps. He wrote a book ‘A Diversion for the Man Longing to Travel to Far Off Places’. The Tabula Rogeriana’ was drawn by him in 1154 for the Norman King Roger II of Sicily. He died in Sicily in 1165/1166.

Question 24.
Observe the following paragraph and answer the given questions.
Relief feature means the high and low places on the surface of the earth. The main relief features are: hills, valleys, plateaus, plains, river basins, rocky and sandy places. Since the maps are flat we cannot show the height on them. We, therefore, use a special symbol for this called contours or contour lines. Contours are lines on the map joining places of same height – measured from the sea level. In other words, all places on a contour line will have the same height from the sea level. Contour lines are also called isolines – lines joining places with some common features.
1. What is meant by Relief feature?
Answer:
Relief feature means the high and low places on the surface of the earth.

2. What are the main relief features?
Answer:
The main relief features are hills, valleys, plateaus, plains, river basins, rocky and sandy places.

3. Why can we not show the heights of the maps?
Answer:
Since the maps are flat we cannot show the height on them.

4. Special symbols are called contour lines.

5. Contours are lines on map joining places of same height measured from the sea level.

6. Contour lines are also called isolines.

7. What are isolines?
Answer:
Isolines are the lines which join the places with some common features.

Question 25.
Observe the given information and answer the following questions.

Names of Famous Explorers	Their Nationality	Their Lifespan	Their Voyage of Exploration
1) Marcopolo	Italian	1254- 1324	China and Asia
2) Ferdinand Magellan	Portuguese	1480- 1521	First voyage around the world.
3) Christopher Columbus	Italian / Spanish	1451 – 1506	America, the new world.
4) Vasco-da-Gama	Portuguese	1469-1524	Ocean route from Portugal to east.
5) Bartholomeu Dias	Portuguese	1457- 1500	Voyage around the Cape of Good Hope on the southern most tip of Africa.

1. Who were the Protuguese explorers?
Answer:
Magellan, Vasco-da-Gama and Bartholomeu Dias were the Portuguese explorers.

2. What do you know about Marcopolo?
Answer:
Marcopolo was an Italian explorer. He explored China and Asia.

3. Who discovered America?
Answer:
Christopher Columbus discovered America.

4. What was the lifespan of Magellan?
Answer:
His lifespan of Magellan was 1480 – 1521. (41 years)

5. Who made his first voyage around the world?
Answer:
Ferdinand Magellan.

Question 26.
Locate the following on the given world map.

1. Present place of Babylonians / Sumarians
2. Greece
3. Sicily
4. Libya
5. Asia
6. Europe
7. Arabia
8. China
9. North America
10. South America

Answer:

Question 27.
Observe the given map.

Now answer the following questions.
1. What are the islands in the Arabian sea
Answer:
Lakshadweep.

2. This indicates
Answer:
External boundaries.

3. What is the scale of the map?
Answer:
1 cm = 200 kms.

4. Name any state on east coast.
Answer:
Odisha, Andhra Pradesh.
(you can write any one)

5. Name any state on the west coast.
Answer:
Gujarat.

Question 28.
Observe the given picture and write down your opinion on Mercator projection.

Answer:

1. Gerardus Mercator was a Dutch geographer and cartographer.
2. The Mercator projection distorts the size and the shape of large objects, as the scale increases from the equator to the poles, where it becomes infinite,
   e.g.: 1) Greenland takes as much space on the map as Africa. In reality Africa’s area is 14 times greater than that of Greenland. Greenland is comparable to Algeria only.
   2) Alaska – Brazil
3. Finland – India.

 

These AP 10th Class Maths Chapter Wise Important Questions Chapter 9 Tangents and Secants to a Circle will help students prepare well for the exams.

AP State Syllabus 10th Class Maths 9th Lesson Important Questions and Answers Tangents and Secants to a Circle

Question 1.
What do we call the part a and b in the below circle ?

Solution:
‘a’ is minor segment and ‘b’ is major segment.

Question 2.
Find the length of the tangent to a circle of radius 7 cm at a point from a distance 25 cm from the centre.
Solution:
Given OA = 25 cm, OB = r = 7 cm
In ΔAOB, ∠B = 90°

OA² = OB² + AB²
⇒ AB² = OA² – OB² = 25² – 7²
⇒AB = \(\sqrt{25^{2}-7^{2}}=\sqrt{625-49}\)
= \(\sqrt{576}\)
= 24 cm

Question 3.
Find the area of a sector of a circle whose radius is 7 cm and angle at the centre is 60°.
Solution:
Radius = 7 cm, Angle at centre = 60°
Area of the sector = \(\frac{\mathrm{x}}{360}\) x πr²
= \(\frac{60 \times \frac{22}{7} \times 7 \times 7}{360}=\frac{154}{6}\) = 25.66 cm²

Question 4.
A tangent is drawn to a circle of radius 4 cm. from a point that lies at a distance of 5 cm. from the centre. Find the measure of length of the tangent.
Solution:

ΔOAB is a right triangle.
OA² = 0B² + AB²
5² = OB² + 4²
OB² = 25 -16 = 9
OB = \(\sqrt{9}\) = 3 cm.

Question 5.
Find the area of the shaded part in the given figure.

Solution:
Area of shaded part
= Area of semi-circle – Area of triangle

Question 1.
Find the length of the tangent from a point 13 cm away from the centre of the circle of radius 5 cm.
Solution:
Radius of the circle = 5 cm
Length of the tangent = x cm

Distance between centre to point be = 13 cm
13² = 5² + x²
x² = 169 – 25 = 144 ⇒ x = 12 cm

Question 2.
If tangents PA and PB from a point P to a circle with centre ‘O’ are inclined to each other at angle of 80°, then find the measured of ∠POA.
Solution:

Between ΔA0P and ΔB0P
∠OAP = ∠OBP = 90° (∵ tangent and line from origin meet at 90° to each other)
0A=0B = radius of the circle = r (say)
and OP is the common side
Hence, we can say ΔAOP = ΔBOP
Therefore, we can say
∠OPA = ∠OPB = \(\frac { 1 }{ 2 }\)(∠APB)
= \(\frac { 1 }{ 2 }\)(80°) = 40°
(∵ given that tangents PA and PB are inclined to each other by 80°)
Now, in ΔAOP,
∠POA + ∠OPA + ∠A = 180°
⇒ ∠POA + 40° + 90° = 180°
⇒ ∠POA = 50°

Question 3.
Draw a circle of radius 3 cm, mark a point ‘P’ on the circle and draw a tan gent at ‘P’.
Solution:
Steps of construction:

1) Draw a circle of radius ‘3’ cm from the centre “O” and pick a point ‘P’ on the circle. Join \(\overline{\mathrm{OP}}\)
2) Now draw a perpendicular at the point ‘P’ to the line segment \(\overline{\mathrm{OP}}\)
such that XY ⊥ \(\overline{\mathrm{OP}}\).
3) Then \(\overline{\mathrm{XY}}\) is the desired tangent at ‘P’ to the given circle.

Question 4.
A chord of a circle of radius 10 cm. subtends a right angle at the centre. Find the area of the corresponding minor segment (use π = 3.14),
Solution:
Radius of circle (r) = 10 cm
Sector angle (x) = 90°
Radius of sector (r) = 10 cm.

Area of sector OACB = \(\frac{\mathrm{x}}{360}\) × πr²
= \(\frac{90^{\circ}}{360^{\circ}}\) × 3.14 × 10 × 10
= 78.5 Sq. cm
Area of Δ AOB = \(\frac { 1 }{ 2 }\) × 10 × 10
= 50 cm²
Area of the Minor Segment = Area of sector OACB – Area of Δ OAB
= 78.5 – 50.0 = 28.5 cm²

Question 1.
A chord of circle of radius 10 cm sub-tends a right angle at the centre. Find the area of the corresponding :
i) Minor segment ii) Major segment (use π = 3. 14)
Solution:
Radius of circle (r) = 10 cm
Sector angle (x) = 90°
Radius of sector (r) = 10 cm.

Area of sector OACB = \(\frac{\mathrm{x}}{360}\) × πr²
= \(\frac{90^{\circ}}{360^{\circ}}\) × 3.14 × 10 × 10
= 78.5 Sq. cm
Area of ∆ AOB = \(\frac { 1 }{ 2 }\) × 10 × 10
= 50 cm²
Area of the Minor Segment = Area of sector OACB – Area of ∆ OAB
= 78.5 – 50.0 = 28.5 cm²
Area of Major Segment = Area of the circle – Area of the Minor Segment
= (3.14 × 10 × 10) – 28.5
= 314-28.5 = 285.5 cm²

Question 2.
Draw a circle of radius 3 cm. Take a point ’P’ at a distance of 5 cm from the centre of the circle. From P, draw 2 tangents to the circle.
Solution:
Award marks for construction as follows:

i) To draw a circle with radius 3 cm
ii) To plot a point P such that OP = 5 cm.
iii) To Bisect QP at M and draw circle with radius OM br MP
iv) To draw tangents from intersecting points of two circles.

Question 3.
Draw a Circle of radius 4 cm. From a point 7.5 cm away from its centre, construct the pair of tangents to the circle.
Solution:
1) Draw a circle with:radius 4 cm with centre O.
2) Locate a point P such that OP 7.5 cm
3) Bisect OP and draw circle with radius MO or MP with centre M.
4) Draw tangents PA and PB from external point P to the given circle.

Question 4.
Draw a circle of radius 5 cm. From a point 8 cm away from its centre, con-struct a pair of tangents to the circle. Find the lengths of tangents.
Solution:
Steps of construction :
1) Construct a circle with a radius of 5 cm.
2) Trace the point ‘p’ in the exterior of the circle which is at a distance of ‘8’ cm from its centre.
3) Construct a perpendicular bisector to OP which meets at M.
4) The draw a circle with a radius of MP or MO from the point M. This circle cuts the previous circle drawn from the centre ‘O’ at the points A and B.
5) Now join the points PA and then PB.
6) PA, PB are the required tangents which are measured 6.2 cm long.

OA = 5 cm ; OP = 8 cm
AP = PB = 6.2 cm.

Question 5.
Draw a circle of radius 4 cm and draw a pair of tangents to the circle, which are intersecting each other 6 cm away from the centre.
Solution:

Steps of Construction:
1) Draw a circle with centre ‘O’ and radius 4 cm.
Take a point ‘P’ outside the circle such that OP = 6 cm. Join OP.
Draw the perpendicular bisector to OP which bisects it at M.
4) Taking M as centre and PM or MO as radius draw a circle.
Let the circle intersects the given circle at ’A’ and ‘B’.
Join P to A and B.
PA and PB are the required tangents of lengths.

Question 6.
Two tangents TP and TQ are drawn to a circle with centre ‘O’ from an external point T, then prove that ∠PTQ = 2. ∠OPQ.
Solution:
Given a circle with centre 0.
Two tangents TP, TQ are drawn to the circle from an external point T.
We need to prove ∠PTQ = 2∠OPQ
Let ∠PTQ = θ

TP = TQ (The lengths of tangents drawn from an external point to a circle are equal)
So ΔTPQ is an isosceles triangle
∴ ∠TPQ + ∠TQP + ∠PTQ = 180°
(Sum of three angles in a triangle)
∠TPQ = ∠TQP = \(\frac { 1 }{ 2 }\)(180° – θ)
= 90°- \(\frac{\theta}{2}\)
∠OPQ = ∠OPT – ∠TPQ
= 90° – 0(90° – \(\frac{\theta}{2}\)) = \(\frac{\theta}{2}\)
= \(\frac { 1 }{ 2 }\) ∠PTQ
∴∠PTQ = 2∠OPQ

Question 7.
Find the area of the segment shaded in the figure in which PQ = 12 cm, PR = 5 cm and QR is the diameter of the circle with centre ‘O’. (Take π = \(\frac{22}{7}\))

Solution:
To find the area of the segment shaded in the given figure.
Here ‘PQ’ = 12 cm; ‘PR’ = 5 cm; ‘QR’ is diameter
Now PQOR is a semicircle then angle in a semicircle is 90°.
then ∠QPR = 90°
∴ ΔPQR is a right angled triangle
∴ Area of ΔPQR = \(\frac { 1 }{ 2 }\) bh
= \(\frac { 1 }{ 2 }\) × PQ × PR
= \(\frac { 1 }{ 2 }\) × 12 × 5 =30 cm² ……………(1)
Now the area of shaded part = area of semicircle – area of ΔPQR
= \(\frac { 1 }{ 2 }\)πrcm² – 30 cm² …………….(2)
In ΔPQR, QR² = PQ² + PR²
(from Pythagoras theorem)
QR² = 12² + 5²
= 144 + 25 = 169 = 13²
∴ QR =13 then
Radius of the circle (r) = QO = \(\frac{\mathrm{Q} R}{2}\)
= \(\frac{13}{2}\) = 6.5 cm
then area of semicircle
= \(\frac { 1 }{ 2 }\)πrcm²
= \(\frac{1}{2} \times \frac{22}{7} \times \frac{13}{2} \times \frac{13}{2}\) = 66.39 cm² …………….(3)
Now putting the values of (1) and (3) in (2) we get
Area of shaded part = (66.39 – 30)
= 36.39 cm².

Question 8.
Draw two tangents to a circle of radius 2.5 cm, from a point ‘P’ at a distance of 7 cm from its centre.
Solution:
1. Draw a line segment PO = 7 cm.
2. From the point O, draw a circle of radius = 2.5 cm.
3. Draw a perpendicular bisector of PO. Let M be the mid-point of PO.
4. Taking M as centre and OM as radius, draw a circle.
5. Let this circle intersects the given circle at the point Q and R.
6. Join PQ and PR.

Question 1.
As shown in the figure, radius of the given circle is 21 cm and ∠AOB = 120°. Then find the area of segment AYB.

Solution:

Given radius of area = OA = OB = 21 cm
Now3 the angle at centre for the sector \(\widehat{\mathrm{OAB}}\) = 120°.
Formula for area of sector = \(\frac{x}{360}\) x πrcm²
= \(\frac{120}{360} \times \frac{22}{7}\) × 21 × 21
= 22 × 21 = 462 cm² ……………………… (1)

Now area of segment \(\widehat{\mathrm{AYB}}\)
= Area of sector – area of Δ OAB.
Let \(\overline{\mathrm{OD}}\) is perpendicular to AB, then
∠AOB = \(\frac{120}{2}\) = 60°
∴ sin 60° = \(\frac{\mathrm{AD}}{\mathrm{OA}}\)

∴ area of ΔOAB = \(\frac { 1 }{ 2 }\) bh
= \(\frac { 1 }{ 2 }\) × AB × OD = AD × OD
= \(\) = 190.95 cm² ………….. (2)
∴ area of segment \(\widehat{\mathrm{AYB}}\)
= 462 – 190.95
= 271.05 cm²
= 271.05 cm²

Question 2.
In a wall clock, length of minutes needle is 7 cm. Then find the area covered by it in 10 minutes of time.
Solution:
Length of minutes needle =(r) = 7 cm
We need to calculate the area covered by in 10 minutes of time = Area of sector.

Now the angle covered by it in 60 minutes = 360°
∴ In 10 minutes = \(\frac{360}{60} \) × 10 = 60°
Area of sector = \(\) × 7 × 7
= \(\frac{154}{6}=\frac{77}{3}\)
∴ Area covered by it in 10 minutes of time = \(\frac{77}{3}\) cm² = 25.66 cm²

Question 3.
Find the area of a right hexagon inscribed in a circle having 14 cm of radius.
Solution:
Radius of circle = OA = OB = OC = OD = OE = OF = 14 cm

∠AOB = \(\frac{360}{6} \) = 60°
∴ In ΔAOB AO = BO = 14 cm
∠AOB = 60°
then ∠OAB = ∠OBA
(∵ Opposite to equal sides)
And ∠OAB + ∠OBA + 60 = 180
=> ∠OAB = ∠OBA = ∠AOB = 60°
Hence it is an equilateral triangle.
∴ OA = OB = AB = 14 cm
∴ Area of hexagon = 6 (Area of ΔAOB)
= 6. \(\frac{\sqrt{3}}{4}\) a²
= 6. \(\frac{\sqrt{3}}{4}\) × 14 × 14
Area of hexagon = 294\(\sqrt{3}\) cm²

Question 4.
Four carrorp board pans are arranged as shown in figure. Radius of the pan is 3 cm each. Then find the area in between of them.
Solution:
Area in between 4 pans = Area of square ABCD formed by joining their centres – 4 (area of sector)

Now side of square ABCD = 3 + 3 = 6
Then area of square ABCD
= 6 × 6
= 36 cm²
and now area of sector = \(\frac{x}{360}\) × πr²
Area of 4 sectors
= 4 × \(\frac{90}{360} \times \frac{22}{7}\) × 3 × 3
= \(\frac{198}{7}\) = 28.3 cm²
∴ Area in between 4 pans i.e., shaded
= 36 – 28.3 = 7.7 cm²

These AP 10th Class Biology Important Questions and Answers 2nd Lesson Respiration will help students prepare well for the exams.

AP State Syllabus 10th Class Biology 2nd Lesson Important Questions and Answers Respiration

10th Class Biology 2nd Lesson Respiration 1 Mark Important Questions and Answers

Question 1.
What are the end products of Aerobic and Anaerobic Respirations?
Answer:
End products of aerobic respiration: Carbon dioxide, Water, Energy
End products of anaerobic respiration: Ethanol / Lactic acid, Carbon dioxide, Energy

Question 2.
In which organisms, blood does not supply the Oxygen?
Answer:
Arthropoda organisms (or) Insects (OR) Tracheal respiratory Organisms.

Question 3.
Hari said that stem also respires along with leaves. How do you support him?
Answer:
Lenticels on stem also help in gaseous exchange in some woody plants along with stomata.

Question 4.
Arrange the apparatus as above and heat the glucose. What will happen to lime water when glucose burns?
Answer:
Lime water turns milky due to carbon dioxide (CO₂).

Question 5.
What is the role of mitochondria in anaerobic respiration?
Answer:
The release of energy from glucose in the presence of oxygen occurs in mitochondria. In anaerobic respiration, as oxygen is absent, mitochondria have no role in respiration.

Question 6.
Fermented idli, dosa produce smell. Name the microorganism responsible for producing such smell.
Answer:
Yeast is responsible for producing such smell in fermented idli, dosa.

Question 7.
In what compound, the energy released during the breakdown of glucose is stored?
Answer:
“ATP” (Adenosine Triphosphate).

Question 8.
Label a and b in the given diagram.

Answer:
(a) Matrix, (b) Cristae.

Question 9.
Name chemical substance produced in human muscles during Anaerobic respiration.
Answer:
Lactic acid is produced in human muscles during Anaerobic respiration.

Question 10.
Why is Diazene Green solution added to the Glucose solution in anaerobic respiration experiment?
Answer:
Diazene Green solution is added to the Glucose solution in anaerobic respiration experiment to check the presence of oxygen in glucose solution.

Question 11.
Name the food material on which trypsin acts and name the end products.
Answer:
i) protein ii) end products – peptones.

Question 12.
“Respiration is the energy releasing process.” Write your opinion on this statement.
Answer:
The given statement is absolutely correct. We respire to use the oxygen to oxidise our food and release energy. This is similar like burning but a slower process. With the help of respiratory enzymes, energy released can be stored in the form of ATP for later use.

Question 13.
Identify the figure.

Answer:
Aerial roots in Mangrove plants.

Question 14.
Can we say that combustion and respiration are almost same actions? What evidences do you have for this?
Answer:

1. In both these processes sugar is converted to carbon dioxide and water.
2. Both these processes require oxygen.
3. Both combustion and respiration releases energy.

Question 15.
What is the role of epiglottis in respiration and swallowing food?
Answer:
The epiglottis is a flexible flap at the superior end of the pharynx in the throat. Epiglot¬tis acts as a lid over glottis and prevents food from entering into larynx. Air from pharynx enters the larynx while food enters into oesophagus.

Question 16.
What is the function of haemoglobin?
Answer:
During respiration haemoglobin carries oxygen to the cells and CO, from cells to lungs.

Question 17.
What is respiration?
Answer:
Respiration is the process by which food is broken down to release energy.

Question 18.
What does the word respiration mean in Latin?
Answer:
In Latin the word respiration means “to breathe”.

Question 19.
Who did comprehensive work on properties of gases, their exchange and respiration?
Answer:
Lavoisier and Priestly.

Question 20.
What was the gas liberated on heating powdered charcoal in a bell jar?
Answer:
It was fixed air. In those days carbon dioxide was known as fixed air.

Question 21.
What is oxygen debt?
Answer:
It is the inadequate supply of oxygen when we undertake strenuous exercise.

Question 22.
What is vitiated air?
Answer:
It is the term used then to show air from which the component needed for burning had been removed.

Question 23.
What is the total lung capacity of human being?
Answer:
The total lung capacity of human being is nearly 5800 ml.

Question 24.
Who was the renowned chemist who wrote a textbook of Human Physiology?
Answer:
John Daper was the renowned chemist who wrote a textbook of Human Physiology.

Question 25.
What happens when air passes through nasal cavities?
Answer:

1. Air is filtered in nasal cavity by mucus lining and the hairs growing from its sides, remove some of the tiny particles of dirt in the air.
2. The temperature of the air is brought close to that of the body.

Question 26.
What is the function of epiglottis?
Answer:
Epiglottis controls the movement of air and food towards their respective passages.

Question 27.
What is breathing?
Answer:

1. Breathing is the process of inhaling and exhaling.
2. The mechanism by which organisms obtain oxygen from the environment and release CO₂ is called breathing.

Question 28.
What are pleura?
Answer:
Pleura are the two membranes that protect lungs from injury.

Question 29.
What is the concentration of oxygen at a height of 13 km from the sea level?
Answer:
At a height of 13 km above sea level the concentration of oxygen is much lower about one-fifth as great as at sea level.

Question 30.
What is cellular respiration?
Answer:
Oxidation of glucose or fatty acids takes place in the cells releasing energy. Hence this process is known as cellular respiration.

Question 31.
Where does aerobic respiration occur in eukaryotic cells?
Answer:
Aerobic respiration occur in cytoplasm and mitochondria of eukaryotic cells.

Question 32.
What is Glycolysis?
Answer:
It is the first stage of respiration. In this breakdown of glucose molecule into two molecules of 3 carbon compound called pyruvic acid or pyruvate releasing energy.

Question 33.
What is the fate of pyruvate in the absence of oxygen in animals?
Answer:
In the absence of oxygen pyruvate will be converted to lactic acid and release small amount of energy in animals.

Question 34.
In which type of respiration pyruvate is converted into carbon dioxide and water?
Answer:
In aerobic respiration pyruvate is converted into carbon dioxide and water.

Question 35.
What is the main reason for feeling pain in muscles after strenuous exercise?
Answer:
Due to the anaerobic respiration in muscles large amounts of lactic acid is accumulated and this results in muscular pains.

Question 36.
What is fermentation?
Answer:
In the absence of oxygen, yeast cells convert pyruvic acid to ethanol. This process is called fermentation.

Question 37.
What is the method used to separate ethanol from the yeast glucose mixture in anaerobic respiration?
Answer:
The method used to separate ethanol from the yeast glucose mixture in anaerobic respiration is fractional distillation.

Question 38.
In which organisms does exchange of gases take place through diffusion?
Answer:
In Amoeba, hydra and planarians exchange of gases takes place through diffusion.

Question 39.
In tracheal respiratory system which carry air directly to the cells in the tissues?
Answer:
Trachioles, the fine branches of trachea carry air directly to the cells in the tissues.

Question 40.
What are the respiratory organs in fishes?
Answer:
Gills or bronchiae are the respiratory organs in fishes.

Question 41.
What is cutaneous respiration?
Answer:
If the respiration occurs through skin, it is known as cutaneous respiration, e.g : Leech, Earthworm and Frog.

Question 42.
What are the other areas on the plant body through which gaseous exchange take place?
Answer:
The areas on the plant body through which geseous exchange take place are the surface of roots, lenticels on the stem.

Question 43.
What is the full form of ATP? How is it formed?
Answer:
I) ATP stands for Adenosine triphosphate.
2) ATP is used to supply energy in the cells for the carrying all the metabolic processes.

Question 44.
What are the factors that control respiration?
Answer:
Oxygen and temperature are the two important factors that control the process of respiration.

Question 45.
What are the substances that are used for the production of energy in all living organisms?
Answer:
Glucose and fatty acids are used for the production of energy in all living organisms.

Question 46.
How many types of respiration are present? What are they?
Answer:
There are two types of respiration. They are :

1. Aerobic respiration and
2. Anaerobic respiration.

Question 47.
Where is energy stored in ATP?
Answer:
Energy is stored in the terminal phosphate bond in ATP which is having three phosphates attached to a molecule of Adenosine.

Question 48.
What are the power houses of the cell?
Answer:
Mitochondria are the power houses of the cell.

Question 49.
What is the main difference between respiration and combustion?
Answer:
In respiration several intermediates are produced and in combustion, there are no such intermediates are produced.

Question 50.
What is the equation that represents respiration?
Answer:
The equation that represents respiration is

Question 51.

.
What are the sites of cellular respiration?
Answer:
Mitochondria are the sites of cellular respiration.

Question 52.
What are cristae in mitochondria?
Answer:
The inner membrane of mitochondria is thrown into several folds called cristae.

Question 53.
What is the net gain of ATP molecules in Glycolysis?
Answer:

1. Four ATP molecules are produced when one molecule of glucose is converted to two molecules of pyruvate but two are consumed.
2. The remaining two ATP molecules are net gain in glycolysis.

Question 54.
How many ATP molecules are produced when one glucose molecule is completely oxidised?
Answer:
A net gain of 38 ATP molecules are formed from the total oxidation of one glucose molecule.

Question 55.
What are the three stages present in complete oxidation of glucose molecule?
Answer:
The three stages present in complete oxidation of glucose molecule are

1. Glycolysis
2. Kreb’s cycle and
3. Electron transport.

Question 56.
Why does oxidation of fatty acids give more energy?
Answer:
Oxidation of fatty acids give more energy due to the presence of more carbon atoms in them.

Question 57.
What are aquatic and terrestrial animals?
Answer:
Animals that live in water are called aquatic animals and that live on land are known as terrestrial animals.

Question 58.
Why is the rate of breathing in aquatic organisms much faster than terrestrial organisms?
Answer:

1. The amount of oxygen dissolved in water is low when compared to the amount of oxygen present in air.
2. Therefore the rate of breathing in aquatic animals is much faster than in terrestrial animals.

Question 59.
Which part of the roots is involved in the exchange of respiratory gases?
Answer:
The part of roots that are involved in the exchange of respiratory gases are root hairs.

Question 60.
What is the average breathing rate in an adult mem at rest?
Answer:
The average breathing rate in an adult man at rest is about 15 to 18 times per minute.

Question 61.
Why is the trachea prevented from collapsing?
Answer:
The walls of the trachea are supported by several ‘C’ shaped cartillagenous rings. They prevent the trachea from collapsing and closing.

Question 62.
Why deos the percentage of carbon dioxide increase in exhaled air?
Answer:
During oxidation of glucose carbon dioxide is produced as waste product. Hence the concentration of carbon dioxide increases in exhaled air.

Question 63.
How does breathing take place in mangrove plants?
Answer:
In mangrove plants breathing takes place through specialised structures called breath¬ing roots or pneumatophores.

Question 64.
How does respiration take place in plants where roots are present in wet places?
Answer:
The plants which have their roots in very wet places have much larger air spaces, connect the stems with the roots, making diffusion from upper parts.

Question 65.
Which form a continuous network all over the plant?
Answer:
The stomatal openings lead to a series of spaces between the cells inside the plant which form a continuous network all over the plant.

Question 66.
What are the reasons for the animals to develop different types of respiratory organs?
Answer:
Body size, availability of water, habitat in which they live and the type of circulatory system are some of the reasons for the animals to develop different types of respiratory organs.

Question 67.
Why do fishes die when taken out of water?
Answer:
Fishes do not have lungs to utilise oxygen for breathing. They have gills which can utilize only dissolved oxygen from water.

Question 68.
What would be the consequences of deficiency of haemoglobin in our bodies?
Answer:
Deficiency of haemoglobin in blood can affect the oxygen supplying capacity of blood to body cells. It can also lead to a disease called Anaemia.

Question 69.
What are the stages of respiration in man?
Answer:
Respiration in man occurs in two stages 1) Inhalation (or) Inspiration 2) Exhalation (or) Expiration.

Question 70.
Which part plays major role in respiration of man?
Answer:
Diaphragm plays a major role in respiration in man.

Question 71.
Which part plays major role in respiration of woman?
Answer:
In woman ribs play a major role in respiration.

Question 72.
How are lungs protected?
Answer:
Lungs are protected by two membranes called pleura. A fluid between these membranes protects the lungs from injury.

Question 73.
What is the composition of exhaled air?
Answer:
Exhaled air contains 16% of oxygen, 4% of carbon dioxide and 79% of nitrogen.

Question 74.
Why are red blood cells red in colour?
Answer:
Red blood cells are red in colour due to the presence of haemoglobin in their cytoplasm.

Question 75.
How is haemoglobin made up of?
Answer:
Haemoglobin is made up of a protein called globin, Iron (Hearn) and organic molecule called porphyrin.

10th Class Biology 2nd Lesson Respiration 2 Marks Important Questions and Answers

Question 1.
(a) Which gas turns lime water milky in this experiment?
Answer:
Carbondioxide (or) CO₂

(b) Which gas do you think might be present in less quantities in the air we breath out as compared to air around us?
Answer:
Oxygen (or) O₂

Question 2.
Balu said that, “Plants perform Photosynthesis during day time. They respire during night time”.
Do you agree with Bain? Why? Why not?
Answer:

1. I do not agree with Balu’s statement.
2. Photosynthesis depends on light for energy but respiration does not depend on light.
3. Hence, photosynthesis takes place during day time only whereas respiration takes place both day and night.

Question 3.
The sportsman who participated in 100 mtr race get more muscle pains. But the sportsman who participates in 5 km’s race get less muscle pains. What is the reason?
Answer:

1. Accumulation of lactic acid results in muscular pain.
2. During 100 m race a well trained athlete can hold his breath and afterwards he pants.
3. In this case, the muscles are using energy released during the anaerobic break down of glucose, lactic acid is produced.
4. The presence of lactic acid in the blood is the main cause of muscle fatigue. Whether it is 100 mtr race or 5 km race.
5. If the body is rested long enough the tiredness goes.

Question 4.
What happens if there is no epiglottis in human beings?
Answer:

1. Food may enters into the larynx.
2. Food may enters into the lungs leading to the death.
3. May not speak properly.
4. Entry of food and air may not be regulated properly.

Question 5.
Write two chemicals and two materials required to conduct the experiment “Heat and Carbon dioxide are evolved during anaerobic respiration”.
Materials required: Thermosflask, splitted corks, thermometer, wash bottle, glass tubes.
Chemicals required: Liquid paraffin, glucose solution, bicarbonate solution, Janus green B and Yeast cells.

Question 6.
Observe the below diagram.
A) To which biosystem is this picture related?
Answer:
Respiratory system.

B) Write the names of the parts of A, B.
Answer:
A – alveolus; B – blood capillary network

C) To which system are they linked with?
Answer:
Respiratory system; circulatory system.

D) Which process is happening here? What happens as a result of it?
Answer:
Gaseous exchange between alveolus of lungs and blood capillaries. Due to this the CO₂, present in blood capillaries enter alveolus and oxygen present in alveolus en¬ter blood capillaries.

Question 7.
A person reached a specific distance once on foot and once by running. In which situation his legs pain? Why?
Answer:

1. When a person runs to reach a specific distance gets pain in his legs.
2. This is due to the production of lactic acid in the muscles.
3. Due to the Anaerobic respiration glucose in muscles converts into lactic Acid.
4. Accumulation of lactic acid causes pain in leg muscles.

Question 8.
What is the advantage of the wet and warm passage of air from the nostrils to capillaries?
Answer:
When the air passes in nasal cavity and in the pharynx some changes take place.

1. The mucus layer and hair in the nasal cavity removes the dust particles in the air.
2. The temperature of the air brought to the body temperature.
3. Moistening the air.

Question 9.
In the experiment of anaerobic respiration with yeast
i) Why was liquid paraffin poured on glucose?
ii) What did you understood about anaerobic respiration?
Answer:
i) The supply of oxygen from the air can be stopped by pouring liquid paraffin on glucose.
ii) Anaerobic respiration takes place in the absence of oxygen. In this glucose molecule is incompletely oxidised. The end products of anaerobic respiration are ethyl alcohol or lactic acid and CO₂.
During anaerobic respiration small amount of energy is liberated (2ATP). Anaero¬bic respiration occurs in many anaerobic bacteria and human muscles cells. The anaero¬bic respiration can be represented as:
C₆H₁₂O₆ → 2C₂H₅OH + 2CO₂+ 56 K.Cal.

Question 10.
See the below table. Write what you know from it.

Gas	% in inhaled air	% of exhaled air
Oxygen	21	16
Carbon dioxide	0.04	4
Nitrogen	79	79

Answer:

1. The inhaled air consists of 21% of oxygen whereas the exhaled air contains 16% of oxygen only. This is due to utlilisation of oxygen during cellular respiration in the body. Hence the difference occurs.
2. Inhaled air contains 0.04% of carbondioxide whereas exhale air contains 4% of carbondioxide.
   The concentration of CO₂ is increased a lot due to the release of CO₂ during cellular respiration in the body.
3. Both inhale and exhale air contains 79% of nitrogen because nitrogen has no role to play in cellular respiration.

Question 11.
What is the pathway of air from nostril to alveolus?
Answer:
Draw a flow chart of Respiratory passage of Humans.

Question 12.
What happens when a baker prepares a dough by mixing yeast in it?
Answer:

1. The yeast is commonly used for fermenting bread is saccharomyces cerevisiae.
2. Baker’s yeast has the advantage of producing uniform, quick, and reliable results because it is obtained from pure culture.
3. Water is mixed with flour, salt and the fermenting agent.
4. The mixed dough is then allowed to rise one or more times.
5. Then loaves are formed and the bread is baked in air oven.

Question 13.
How does respiration in amoeba and hydra occur through diffusion? (OR)
What are the similarities in respiration of amoeba and hydra?
Answer:

1. Amoeba and hydra are aquatic organisms.
2. Respiration in them occurs through diffusion.
3. As oxygen is used by these organisms in respiration, its concentration is reduced in cytoplasm. Hence oxygen diffuses into cytoplasm from surrounding water.
4. During respiration CO₂ is continuously produced, its concentration increases in the cytoplasm, hence it diffuses into surrounding water.

Question 14.
Write a short note on ATP. (OR) Expand ATP.
Answer:

1. From the break down of glucose the energy is released and stored up in a special compound known as ATP (Adenosine Triphosphate).
2. It is a small parcel of chemical energy. The energy currency of these cells is ATP an energy rich compound that is capable of supplying energy whenever needed within the cell.
3. Each ATP molecule gives 7200 calories of energy. This energy is stored in the form of phosphate bonds.
4. If the bond is broken, the stored energy is released.

Question 15.
How do Dolphin and Crocodile respire?
Answer:

1. The aquatic animals like dolphin and crocodile respire with the help of lungs.
2. They come out of the water for air.
3. These two animals were lived on land initially.
4. Later they lived in water and developed several adaptations to live in water.

Question 16.
Why are Mitochondria called “Power houses of cell”? (QR)
What is the energy producing organ in a cell? How does it produce energy?
Answer:

1. Cellular respiration in prokaryotic cells like that of bacteria occurs within the cytoplasm.
2. In eukaryotic cells cytoplasm and mitochondria are the sites of reaction.
3. The produced energy is stored in mitochandria in the form of ATP.
4. Hence, mitochondria are called “Power houses of cell”.

Question 17.
Write the rate of respiration in different age groups of human beings.
Answer:

1. Newborn child: 32 times per minute
2. Children of 5 years: 26 times per minute
3. Man of 25 years: 15 times per minute
4. Man of 50 years: 18 times per minute

10th Class Biology 2nd Lesson Respiration 4 Marks Important Questions and Answers

Question 1.
Write about respiration in mangroves that grow in marshy lands.
Answer:

1. Mangroves grown near the marshy places respire through aerial roots or respiratory roots.
2. The root hairs exchange the gases from their surface.
3. They obtain oxygen from the airspaces present between the soil particles.
4. The plants grown in marshy places are adapted to develop aerial roots above the soil surface which helps in gaseous exchange.

Question 2.
a) What is the aim of this experiment?
Answer:
Heat is liberated during respiration.

b) What change do you observe in thermometer readings?
Answer:
Reading increases in the thermometer.

c) In your opinion, where did this heat come from?
Answer:
The heat comes from the germinating seeds which respire and releasing heat.

d) What precaution should we take, while doing this experiment?
Answer:
The bulb of the thermometer should be dip in the germinating seeds (or) sprouts.

Question 3.
You have conducted this experiment in your classroom. Now answer the following questions.
a) What do you prove by conducting this experiment?
Answer:
To test the production of heat and carbon dioxide during anaerobic respiration.

b) Why do you heat glucose solution?
Answer:
To remove the dissolved oxygen in the glucose solution.

c) How do you confirm that glucose solution is free from oxygen after heating it?
Answer:
By adding diazine green (Janus green B) solution to glucose solution, it turns to pink.

d) What are the changes you notice in the lime water?
Answer:
Lime water turns milky white.

Question 4.

i) What change did you observe in the thermometer in the given experiment?
Answer:
Raise in the temperature

ii) Where does the heat come from?
Answer:
From the germinating seeds during respiration

iii) What result you will get, if you perform this experiment with dry seeds?
Answer:
No change of temperature in thermometre.

iv) What are the apparatus used in this experiment?
Answer:
Glass jar, germinating seeds, cork, thermometer.

Question 5.
Observe the set of apparatus and answer the following questions.
i) Which process do we know with the help of this experiment?
Answer:
Combustion.

ii) How does this process differ with respiration?
Answer:
Respiration occurs in the presence of water.
Combustion occurs in the absence of water.

iii) What are the similarities between this process and respiration?
Answer:
In both processes energy is released.

iv) Which gas turns lime – water milky?
Answer:
Carbon-di-oxide (CO₂)

Question 6.
Look at the following experiment. Answer the questions.

a) What is the aim of the experiment?
Answer:
The aim of the experiment is CO₂ is released during anaerobic respiration.

b) Which agent is used to find the presence of oxygen?
What changes do you observe when oxygen is present in Glucose solution?
Answer:
To find the presence of oxygen diazine green (Janus Green B) solution is used. The blue diazine green solution turns pink when oxygen is present in the glucose solution.

c) Why is liquid paraffin poured on glucose solution?
Answer:
By pouring liquid paraffin on glucose solution, the supply of oxygen from the air can be cut off.

d) Which gas is released during the experiment? How can you prove it?
Answer:
Carbon dioxide is released.
The released CO₂ passes into lime water it turns milky.

Question 7.
Observe the following diagram and answer the following questions.

1. What do we call the membranes that cover the lungs?
2. What is the functional unit of lungs ?
3. Which part produces the sound ?
4. What does ‘X’ denote ?

Answer:

1. Pleura
2. Alveoli
3. Larynx
4. Trachea

Question 8.
Observe the diagram and answer the following questions.

a) What does the given diagram indicate?
b) What is the part ‘X’ in the diagram?
c) What is the function of the given picture?
d) To which system the given picture belongs to?
Answer:
a) The given diagram indicates mitochondria.
b) Matrix
c) Performing cellular respiration and releasing energy in the form of ATP.
d) Respiratory system.

Question 9.
Observe the experimental setup and answer the given questions.
A) What is the aim of this experiment?
B) What are the apparatus required for this experiment?
C) What changes do you observe in thermometer during this WKm experiment?
D) What will happen, if dry seeds are taken instead of germinating seeds in this experiment?
Answer:
A) Heat is liberated during respiration.
B) Glass jar, Germinating seeds, Cork and Thermometer.
C) We can notice the raise in temperature after observing the thermometer readings.
D) There will be no change of temperature in the thermometer. We can’t prove the aim of the experiment.

Question 10.
Observe the below diagram and answer the following questions:
i) What does the above setting (diagram) indicate?
Answer:
The above setting (diagram) indicates to prove that carbon dioxide and heat are liberated during anaerobic respiration by yeast cells.

ii) Why is boiled and cooled glucose covered with paraffin?
Answer:
To prevent supply of air, boiled and cooled glucose is covered with paraffin.

iii) What is the use of adding diazine green to glucose solution? What change you notice in glucose solution?
Answer:
Diazine green is added to glucose solution to know whether oxygen is present or not in glucose solution. When the availability of oxygen is less the diazine green changes to pink colour.

iv) Why is lime water used in this experiment?
Answer:
To know whether carbon dioxide is released or not in this experiment lime water is used. Carbon dioxide changes lime water to milky white.

v) Why is bulb of thermometer dipped in the glucose water?
Answer:
To know the rise in temperature of glucose solution when heated, the bulb of thermometer is dipped in the glucose water.

Question 11.
Explain with the help of a flow chart, the path way of air in humans.
Answer:

Question 12.
Study the graph and answer the following questions :
Graph showing effects of vigorous excercise on the concentration of lactic acid in blood.
i) What was the concentration of lactic acid in blood to start with?
ii) What was the greatest concentration of lactic acid reached during the experiment?
iii) What is the concentration of lactic acid after 25 minutes of exercise?
iv) What is the relationship between lactic acid and muscle pain?
Answer:
i) 20 mg/cm³
ii) 20 minutes (Or) at “B” point,
iii) 101 mg/cm³
iv) If concentration of lactic acid increases, muscle pains also increases.

Question 13.
Observe the following :

Write the answers to the following questions:
i) How many Pyruvic acid molecules form from one Glucose?
Answer:
2 Pyruvic acid molecules.

ii) What conditions influence Pyruvic acid to participate in Aerobic and Anaerobic respiration?
Answer:
Presence of oxygen

iii) In which we get more energy in both Aerobic and Anaerobic respirations?
Answer:
Aerobic respiration

iv) The chemical that is formed in human muscles during Anaerobic respiration.
Answer:
Lactic acid

Question 14.
Why does the exchange of gases happen only in alveoli, though arteries are present in pharynx, trachea and bronchus?
Answer:

1. Alveoli are tiny air sacs in the lungs surrounded by capillaries
2. They are numerous and only single cell thickness
3. They increase the efficiency of gas exchange.
4. Due to the difference in a gradient of O₂ oxygen diffuse from alveoli to blood capillaries.

Question 15.
What are the events or steps in respiration?
Answer:
The following are the events or steps in respiration.

1. Breathing: Air moves into lungs and out of lungs.
2. Gaseous exchange in lungs: Exchange of gases between alveoli and blood.
3. Gas transport by blood: Transport of oxygen from blood capillaries of alveoli to body cells and return of carbon dioxide.
4. Gaseous exchange in cells: Exchanging oxygen from blood into the cells and carbon dioxide from cells into the blood.
5. Cellular respiration: Using oxygen in cell processes to produce carbon dioxide and water, releasing energy to be used for life processes.

Question 16.
What will happen if the respiratory tract is not moist? (OR)
Why respiratory tract should be moist?
Answer:

1. If the respiratory tract is not moist the dirt particles in the inhaled air will not be removed from air in the nasal cavities and reaches lungs and creates problems to lungs.
2. The temperature of the inhaled air is brought close to that of the body for the smooth passage in the respiratory tract. If it is dry, it is not possible.
3. If the surface dries out, gas exchange will happen at a very reduced rate since fast moving gaseous oxygen molecules do not efficiently cross the alveoli membrane.
4. The reduced gas exchange is most likely not enough to support blood oxygenation for vital functions.
5. Hence respiratory tract should be moist for smooth exchange of gases.

Question 17.
Explain the process of transportation of gases through the blood.
Answer:

1. The relative amount of gases and their combining capacity with haemoglobin and other substances in blood determine their transport via blood in the body.
2. When oxygen present in the air is within normal limits (around 21%) then almost all of it is carried in the blood by binding to haemoglobin, a protein present in the red blood cells.
3. As oxygen is diffused in the blood, it rapidly combines with the haemoglobin to form oxyhaemoglobin.
4. Not only can haemoglobin combine with oxygen, but it can easily broken into haemoglobin and oxygen.
5. Carbon dioxide is usually transported as bicarbonate, while some amount of it combines with haemoglobin and rest is dissolved in blood plasma.
   

Question 18.
Why is human life impossible at higher altitudes without a supplementary supply of oxygen? (OR)
The concentration of oxygen in air decreases as we go up from sea level. Explain briefly.
Answer:

1. If haemoglobin is exposed to air at sea level, every molecule in air combines with oxygen to form oxyhaemoglobin.
2. At a height of 13 km above sea level, the concentration of oxygen is much lower about l/5th of a sea level.
3. Under these conditions about half as many molecules of oxygen combine with haemoglobin to form oxyhaemoglobin.
4. Blood cannot carry enough oxygen to the tissues.
5. Hence human life is impossible at such a high altitude without a supplementary supply of oxygen.
6. Provision for such a supply is built into modern aircraft which have pressurized cabins that maintain an enriched air supply.

Question 19.
What are the different ways in which glucose is oxidised to provide energy in various organisms? Give one example of each.
How does oxidation of glucose occur in various organisms?
Answer:

1. Glucose is the most commonly used sugar for deriving energy in plants, animals and in microorganisms.
2. In all these organisms glucose is oxidized in two stages.
3. The first stage is known as Glycolysis. It occurs in cytoplasm.
4. During glycolysis glucose is converted to two molecules of pyruvic acid.
5. In the second stage if oxygen is available pyruvic acid is converted to C02 and water, large amount of energy is released. This is known as aerobic respiration. It occurs in most of the plant and animal cells.
6. If oxygen is inadequate or not available, pyruvic acid is converted into ethanol and carbon dioxide. This is anaerobic respiration taking place in yeast cells that is called fermentation.
7. If oxygen is not available in muscle cells, the pyruvic acid is converted into lactic acid.
   

Question 20.
Write the adaptations seen in plants living in water logged conditions.
(OR)
What are the adaptations seen in magrove plants?
Answer:

1. Most plants can aerate their roots by taking in the oxygen through lenticels or through the surface of their root hairs.
2. But plants which have their roots in very wet places, are unable to do this.
3. They are adapted to these water logged conditions by having much larger air spaces which connect the stems with the roots, making diffusion from the upper parts much more efficiently.
4. The problem of air transportion is more difficult for trees and may not survive with their roots permanently in water.
5. To overcome this problem the mangrove tree of the tropics which raise up aerial roots above the surface and takes in oxygen.

Question 21.
Describe the mechanism of branchial or gill respiration in fishes.
(OR)
Briefly explain the process of exchange of gases in fishes during respiration.
Answer:

1. Some aquatic animals like fishes have developed special organs for respiration which are known as gills or branchiae.
2. Blood is supplied to gills through capillaries which have thin walls where gases are exchanged. Gills are present in the gill pouches or branchial pouches.
   
3. Gills are provided with leaf-like folds called gill lamellae.
4. Fish keeps its mouth open and lowers the floor of the oral cavity. As a result water from outside will be drawn into the oral cavity.
5. Now the mouth is closed and the floor of the oral cavity is raised.
6. Water is pushed into the pharynx and is forced to gill pouches through internal branchia apertures.
7. When water passes through gill lamellae exchange of gases takes place, that is oxygen diffuses from water to blood and CO₂ from blood into water.
8. Then water flows through external branchia aperture.

Question 22.
Explain briefly about Pranayama- the art of breathing. (OR)
How can the capacity of lungs be improved by yoga?
Answer:

1. To improve breathing capacity the saint Patanjali developed Yogabyasa.
2. The art of breathing in Yogabyasa is called Pranayama. Prana means gas, ayama means journey.
3. In Pranayama practice air is allowed to enter three lobes of lungs in order to in¬crease the amount of oxygen to diffuse into blood.
4. More amount of oxygen available to brain and tissues the body will be more active.
5. It is very important to practise Pranayama regularly to make our life healthy and active.
6. All people irrespective of age and sex should practise Pranayama under the guidance of well trained Yoga Teacher to improve the working capacity of lungs.

Question 23.
What are the experiments carried out by Lavoisier to understand the property of gases?
Answer:

1. In his early experiments Lavoisier thought that the gas liberated on heating powdered charcoal in a bell jar kept over water in a trough was like fixed air i.e., carbon dioxide.
2. The next series of experiments deals with the combustion of phosphorous in a bell jar. From this he showed that whatever it was in the atmospheric air which combined with the phosphorous was not water vapour.
3. This was respirable air, a component of air that also helped in burning.
4. The air that we breathe out precipitated lime water while that after heating metal did not.
5. From this, he concluded that there were two processes involved in respiration.
6. Lavoisier carried out another experiment by which he showed that about one sixth of the volume of ‘vitiated air’ consists of chalky acid gas (fixed air).
7. Either eminently respirable air is changed in the lungs to chalky acid air; or an exchange takes place, the eminently respirable air being absorbed, and an almost equal volume of chalky acid air being given up to the air from the lungs.
8. Lavoisier had to admit that there were strong grounds for believing that eminently respirable air did combine with the blood to produce the red colour.

Question 24.
Explain the evolutionary changes in energy-releasing system.
(OR)
What are the different respiratory systems in animal groups?
Answer:
Exchange of gases is a common life process in all living organisms, but it is not same in all.

1. Diffusion:
   1. Single-celled organisms like amoeba or multicellular organisms like hydra and planarians obtain oxygen and expel carbon dioxide directly from the body by the process of diffusion.
   2. In multicellular animals special organs are evolved.
   3. Body size, availability of water and the type of circulatory system are some of the reasons for the animals to develop different types of respiratory organs.
2. Tracheal respiratory system : In insects tracheal respiratory system is present in which small branches of trachea called trachioles carry air directly to the cells in the tissues.
3. Bronchial respiration : In fishes gills are utilised for the exchanges of gases. Blood is supplied to gills through capillaries which have thin walls for exchange of gases. This is called bronchial respiration.
4. Cutaneous respiration: 0 Respiration through skin is called cutaneous respiration.
   Eg: i) Earth worms and leeches.
   ii) Frog, an amphibian can respire through lungs and skin.
5. Pulmonary respiration : Most of the higher animals respire with the help of lungs. This type of respiration is known as pulmonary respiration. Eg: Mammals.

Question 25.
Describe the structure of mitochondria with the help of a diagram. (OR)
Which cell organelle is called energy currency or power house of cell? What do you know about its construction?
Answer:
Mitochondria is known as energy currency or power house of cell.
Structure of mitochondria:

1. Mitochondria are sac-like structures present in the cytoplasm of the cells.
2. Mitochondria have two compartments-an inner compartment and an outer compartment. The substance in the inner compartment is called matrix.
3. The matrix is surrounded by a membrane called inner membrane of mitochondria.
4. The inner membrane is thrown into several folds called cristae. The cristae extended into the matrix.
5. The space between the folds is continuous with the outer compartment.
6. On the inner membrane, projecting into the matrix are a large number of particles called elementary particles.
7. These particles have a spherical head and a stalk. They are attached to the inner membrane by their stalk and the head portion of the particle is in the matrix.
8. The outer compartment is surrounded by another membrane – the outer membrane. The outer membrane is smooth and has no projections.
9. The inner membrane, the matrix and the elementary particles in the mitochondria have large number of enzymes and other required proteins for the respiration and energy production.

Question 26.
Draw and label mitochondria. Why should we call it cell of power ?
Answer:

Oxidation of glucose molecule occurs in the mitochondria, ot cell. This is known as cellular respiration. The energy produced during cellular respiration stored in the form of ATP molecule. Energy producing cellular respiration occurs in mitochondria hence we call it cell of power or power house of the ceil.

Question 27.
Describe how oxygen enters the blood in lungs with the help of block diagram.
(OR)
How does gaseous exchange occur in lungs?
Answer:

1. Gaseous exchange takes place within the lungs by diffusion from the alveoli to blood capillaries and vice versa. Alveoli in lungs are numerous and only one cell thick.
   
2. Alveoli are surrounded by capillaries that are also one cell thick.
3. Blood, dark red in colour flows from the heart through these capillaries and collects oxygen from the alveoli.
   At the same time, carbon dioxide passes out of the capillaries and into the alveoli.
4. When we breathe out, we get rid of carbon dioxide.
5. The bright red, oxygen rich blood is returned to the heart and pumped out to all parts of the body.

Question 28.
What is the role of diaphragm and ribs in respiration? Are both active in man and woman?
Answer:
Diaphragm:

1. Diaphragm is a muscular dome shaped tissue present at the floor of the chest cavity separating abdomen from respiratory system.
2. Diaphragm expands downwards into the abdomen thus increasing chest cavity. This allows the lungs to expand as we inhale.
3. As the diaphragm contracts upwards thus decreasing the chest cavity, it allows the air to expel from the lungs.
   Ribs:
4. The ribs protect the lungs and expand as we inhale to facilitate space for the lungs to expand. The ribs then contract expelling the air from the lungs.
5. The intercostal muscles present between the ribs help in contraction and relaxation of ribs.
6. In man, diaphragm plays a major role in the respiration, while in woman, the ribs play a major role.

Question 29.
Why are alveoli so small and uncountable in number? (OR)
How do alveoli increase the area for exchange of gases?
Answer:

1. The pouch-like air sacs at the ends of the smallest branchioles are called alveoli.
2. The walls of the alveolus are very thin and they are surrounded by very thin blood capillaries.
3. It is in the alveoli that gaseous exchange takes place.
4. There are millions of alveoli in the lungs. The presence of millions of alveoli in the lungs provides a very large area for the exchange of gases.
5. And the availability of large surface area maximises the exchanges of gases.

Question 30.
Write a brief note on respiration in plants. (OR)
Does respiration occur in plants? Explain briefly about it.
Answer:

1. In most plants exchange of gases takes place through stomata.
2. There are other areas on the plant body like surface of roots, lenticels on stem, etc. the gaseous exchange takes place.
   
3. Some plants have specialized structures like breathing roots of mangrove plants as well as the tissue in orchids.
4. Breathing roots and tissue in orchids help plants to take oxygen to produce energy and release carbon dioxide.
5. Inside the plants openings lead to a series of spaces between the cells which form a continuous network all over the plant.
6. The whole system works by diffusion.
7. As the oxygen is used up by the cells a gradient develops between the cells and the air in the spaces.
8. So oxygen passes in between the air spaces and the air outside stomata and lenticels.
9. In the same way, as more carbon dioxide is given out by the cells, a gradient occurs in the reverse direction and it passes out.

Question 31.
Write a brief note on tracheal respiration in insects.
Answer:

1. In insects blood do not contain haemoglobin, and blood is white in colour. Hence it cannot carry oxygen.
2. For respiration insects adopt a special system called tracheal system.
   
3. This system consists of a series of tubes called trachea.
4. These trachea open out through small apertures called spiracles on either side of the body.
5. All tracheal tubes of each side join and form a longitudinal tracheal trunk.
6. Trachea divide into a number of branches called tracheoles which carry air directly to the tissues.
7. As the air moves in and out of the trachea, oxygen present in the air diffuses into the cells and CO₂ diffuses into the air from the cells.

Question 32.
Write about the mechanism of respiration in human beings. (OR)
How does exchange of gases take place in human beings?
Answer:

1. Respiration in man occurs in two stages. They are inspiration and expiration.
2. During inspiration air from outside enters into the lungs by increasing the chest cavity.
   
3. Increase in the chest cavity is made by pulling the diaphragm down and pushing the ribs forward.
4. As the air pressure in the lungs is reduced, air from outside enters the lungs through external nostrils, nasal cavities, internal nares, pharynx, epiglottis, larynx, trachea, bronchi and branchioles and finally reach the alveoli where exchange of gases takes place.
5. During expiration the diaphragm and ribs come back to original positions.
   
6. This reduces the volume of chest cavity.
7. So the volume of lungs is decreased and air under pressure comes out of the lungs.

Question 33.
Study the graph given below and analyse the reasons for accumulation of lactic acid in blood after strenuous exercise.

Answer:

1. This graph shows the relation between time accumulation of lactic acid in the muscles.
2. At the beginning, the amount of lactic acid in the blood is very less.
3. Gradually it is increased by vigorous exercise.
4. Within 15 minutes it goes to maximum level which causes muscle pain.
5. Then the lactic acid is removed from muscles in an hour.
6. Muscles produce energy by anaerobic respiration.
   C₆H₁₂O₆ → lactic acid + CO₂ + energy
7. In the vigorous exercise, muscle work rapidly and produce more lactic acid.
8. That’s why lactic acid concentration is increased in muscle after strenuous exercise.

Question 34.
Observe the above graph of lactic acid accumulation in the muscles of an athlete and answer the following questions.
a) What was the concentration of lactic acid in the blood to start with?
Answer:
It is 20 mg/km³.

b) What was the greatest concentration reached during the experiment?
Answer:
101 mg/cm³.

c) If the trend between points C and D were to continue at the same rate, how long might it take for the original lactic acid level to be reached once again?
Answer:
55 minutes.

d) What does high level of lactic acid indicate about the condition of respiration?
Answer:
It indicates the accumulation of lactic acid in muscles through anaerobic respiration. The presence of lactic acid in the blood is the main cause of muscular pain and fatigue.

Question 35.
Describe the structure of human lungs with the help of a diagram.

Answer:

1. A pair of lungs is present in the chest cavity one on either side of the heart.
2. Lungs are spongy and elastic. They are enclosed by two membranes called pleura.
3. Space between the two membranes of pleura is filled with fluid. Pleura protects the lungs from injury.
4. Right lung is larger than the left lung.
5. Right lung is made of three lobes while the left lung has only two lobes.
6. Lung has several thousands of alveoli which are supplied with blood capillaries.
7. Pulmonary artery brings deoxygenated blood from heart to lungs.
8. After entering the lung, this artery divides into several arterioles and capillaries and supplies deoxygenated blood to alveoli.
9. Gas exchange occurs in the alveoli.
10. Oxygenated blood is carried from the lung to heart by the pulmonary vein.

Project work
Question 1.
Observe and analyse the questions in the table given below.

	Newly borned	(Children)	(Children)	Children	Youth/Adults	Athletics
	(0-3 months)	(3-6 months)	(6-12 months)	(1-10 years)
Heart beat	100 -150	90-120	80 -120	70-130	60-100	40-60

A) In which age group rate of heart beat is more?
B) In which age group rate of heart beat is less?
C) Why heart beat in Athletics is less?
D) What are reasons for more rate of heart beats differences between the newly born and children?
Answer:
A) In newly borned babies which are in 0 – 3 months of age group rate of heart beat is more i.e., 100 to 150 times.
B) In athletics the rate of heart beat is less i.e., 40 – 60 times / minute.
C) The heart of athlete pump more blood per beat due to increased cardio-vascular fitness in the structure of the heart. The muscles in the heart wall thicken and the heart pumps more blood with each beat.
D)

1. Mothers who have special medical conditions such as thyroid diseases or diabetes may give birth to new borns who are temporarily tachscardic from altered hormone and glucose levels. Tachycardia is a medical term for a very rapid heart beat.
2. Some infants are born with accessory electrical tissue in the heart causes epi¬sodes of rapid heart rate.
3. In wolf – parkinson syndrome – white syndrome there are extra cells and an ac-cessory path way, causing additional heart beats.

Question 2.
Observe the table given below and analyse the questions.

Name of the animal	Weight of the body	Weight of the heart	No. of beats/min
Blue whale	1,30,000 kg	750 kg	7
Elephant	3000 kg	12-21 kg	46
Man	60 – 70 kg	300 gm	76
Coaltit (Bird)	8 gm	0.15 gm	1200

A) Why heart beat is less in animals with more weight?
B) Why heart beat is more in animals with less weight?
C) What is the relationship between weight of the body and rate of heart beat?
D) Why the weight of heart is less than body weight?
Answer:
A) The animals with more weight usually have weighted hearts. In one heart beat the large-sized hearts sends high amounts of blood to circulatory system. It takes time for the fulfilment of heart. Hence heart beat is less in animals with more body weight.
B) Usually the heart is very small in less weight animals. When the animal shrinks or contracts , its heart actually decrease the volume of blood proportionately. It can compensate for the reduced volume by increasing the rate at which it can supply blood to all body parts.
C) As the weight of the body of the animal increases the rate of heart beat per minute decreases. And also as the weight of the body decrease the rate of heart beat increases.
D) Usually the body of an organism is made by number of organs which makes the body functional. As all the body parts constitute the whole organism, the heart one of the organ is usually has less weight than body weight of an animal.

These AP 8th Class Biology Important Questions 1st Lesson What is Science will help students prepare well for the exams.

AP State Syllabus 8th Class Biology 1st Lesson Important Questions and Answers What is Science

8th Class Biology 1st Lesson What is Science Textbook Questions and Answers

Improve Your Learning

Question 1.
What is Science?
Answer:
Science:

1. Science is the concerted human effort to understand the history of the natural world how the natural world works, with observable physical evidence.
2. Science is an organized study of knowledge which is based on experimentation.
3. Science is a tool for searching truths of nature.
4. Science is the way of exploring the world.

Question 2.
What are scientific methods ? Write the steps involved in a scientist’s work.
Answer:
Scientific Methods:

1. Scientists solve a problem or answer a question by using organized ways. They are called “Scientific Methods”.
2. The following are the steps involved in a scientific work.
   a) Step -1 : Ask questions.
   b) Step – 2 : Form hypothesis.
   c) Step – 3 : Plan experiments.
   d) Step – 4 : Conduct experiments.
   e) Step – 5 : Draw conclusions.

Question 3.
What is the way to find out solutions for the problems in scientific way?
Answer:
To find out solutions for the problems in scientific way we need to follow a sequential order. So we go through the following.

1. Identifying problem : Let us identify any problems from your surroundings.
   Ex: The bulb did not lit in the room.
2. Making hypothesis: List out different solutions which your think for the identifying problem.
   Ex: De filament, fuse failure, switch problem, wire problem.
3. Collecting information: To solve the identifying problem collect material, apparatus, Information, persons.
   Ex: Collect material like tester, screwdriver, wooden scale, wires, insulation tape, table and blade.
4. Data analysis: Arrange the collected data or information to conduct experiment.
5. Experimentation: To prove selecting hypothesis conduct experiment.
   Ex: Observe filament of the bulb.
6. Result analysis: Analyzing the results to find out the solution for the problem based on the results you need to select another hypothesis to prove.
   Ex: Filament of the bulb is good in condition so we need to observe fuse.
7. Generalisation: Based on the experiment and its results explain the solution for the problem.
   Ex: Fuse is damaged so the bulb not glow, so we need to replace the fuse.

Question 4.
During investigation in science, name some rules to be followed for the safety.
Answer:

1. Think ahead: Study the steps of the investigation, so you know what to expect.
2. Be neat: Keep your work area clean.
3. Oops!: If you should spill or break something or get cut, tell your teacher right away.
4. Watch your eyes: Wear safety goggles anytime you are directed to do so.
5. Yuck!: Never eat or drink anything during a scientific activity.
6. Protect yourself from shocks: Be especially careful if an electric appliance is used. Be sure that electric cords are in a safe place where you can’t trip over them. Don’t ever pull a plug out an outlet by pulling on the cord.
7. Keep it clean: Always clean up when you have finished.

Question 5.
If you plan a test to find out how much water different brands of paper towels absorb, write down the steps of the experiment.
Answer:

1. Pour 1 liter of water into each of three beakers.
2. Put a towel from each of the three brands into a different beaker for 10 seconds.
3. Pull the towel out of the water, and let it drain back into the beaker for 5 seconds.
4. Measure the amount of water left in each beaker.
5. The towel put in the beaker in which less amount of water is left absorbs more water.

Question 6.
Collect information about scientists and their works and prepare a chart and paste it in your classroom.
Answer:

Question 7.
What are process skills ?
Answer:
Observe, compare, classify are the process skills.

1. Observe – Use the senses to learn about objects and events.
2. Compare – Identify characteristics of things or events to find out how they are alike and different.
3. Classify – Group or organize objects or events in categories based on specific characteristics.

Question 8.
Read the following.
Answer:
Endemic Species:

You may find that these animals are specifically found in certain regions of the world.
You are also aware of the fact that many plants and animals are widely distributed throughout the world. But some species of plants and animals are found restricted to some areas only. Plants or animal species found restricted to a particular area of a country are called Endemic Species.
Now answer the following questions.
a) Name an Endemic Species of our State.
Answer:
Tiger, Peacock and Crane.

b) You may notice that Kangaroo is endemic to Australia and Kiwi to New Zealand. Can you tell which among the above picures represent an endemic species of India ?
Answer:
Peacock and Tiger.

c) Name some other endemic species of India.
Answer:
Indian Lion, Indian Wolf, Great Indian bustard bill.

Question 9.
Reading the following poster.

Answer:
Biotic Components:
Producers – Mangrove, spirogyra, euglena, oscillatoria, blue green algae, ulothrix, etc.
Consumers – Shrimp, crab, hydra, protozoans, mussel, snails, turtle, daphnia, brittle word, tube worm, etc.
Decomposers – Detritus feeding bacteria, etc.
Abiotic components – Salt and fresh water, air, sunlight, soil, etc.

Question 10.
What is Generalisation? Give an example.
Answer:
Based on the experiment and its results explaining the solution for the problem is called Generalisation.
Example:

a) The bulb did not light in the room.
b) Identify the problem that may be defilament, fuse failure, switch problem, wire problem.
c) Then take tester, screwdriver, wooden scale, wires, insulation tape, table and blade.
d) Observe the filament of the bulb.
e) If the filament of the bulb is good, then observe fuse.
f) As the fuse is damaged, we need to replace the fuse.

Based on this, the bulb did not lit in the room because the fuse is damaged. This is the generalisation in the above experiment.

Question 11.
What are the different types of writings used by scientists to describe what they are doing or learning?
Answer:

1. Informative writing, Narrative writing, Expressive writing, Persuasive writing are used by the Scientists.
2. In informative writing, scientists describe the observation, inferences and their conclusion.
3. In narrative writing the scientists describe about something, give examples or tell a story.
4. In expressive writing, they may write letters, poems, or songs.
5. In persuasive writing they write letters about important issues in science and also write about what they have learned about science which helps others to understand about their thinking.

Question 12.
How do scientists use numbers in their investigations?
Answer:

1. Measuring, interpreting data, using number sense are few methods used by scientists in their investigations.
2. Scientists make accurate measurements by using different measuring instruments like thermometer clocks, timers, rules, a spring scale, beakers, balance and other containers to measure liquids.
3. Scientists collect, organize, display and interpret data by using tables, charts and graphs.
4. Scientists compare and order numbers, compute with numbers shown on graphs and read the scales on thermometers, measuring cups, beakers and other tools.
5. Good scientists apply their maths skills to help them display and interpret the data they collect.

Question 13.
What is Hypothesis? What are variables?
Answer:

1. Making a statement about an expected outcome is called Hypothesis.
2. Variables are factors that can affect the outcome of the investigation.

Question 14.
What do the following persons do?
a) A geologist
b) A chemist
c) A biologist
d) An ecologist
e) A climatologist
Answer:
a) A geologist examines the distribution of fossils and makes observations to find patterns in natural phenomena.
b) A chemist observes the rate of a chemical reaction at a variety of temperatures.
c) A biologist observes the reaction of a particular tissue to various stimulants.
d) An ecologist observes the territorial behaviours of different animals and birds.
e) A climatologist collects data from weather balloons and makes observations basing on it.

These AP 8th Class Biology Important Questions 3rd Lesson Story of Microorganisms 2 will help students prepare well for the exams.

AP State Syllabus 8th Class Biology 3rd Lesson Important Questions and Answers Story of Microorganisms 2

8th Class Biology 3rd Lesson Story of Microorganisms 2 1 Mark Important Questions and Answers

Question 1.
What are antibodies?
Answer:
Whenever a disease causing microorganisms enter in our body, it produces some de¬fenders to fight against them, these are called antibodies.

Question 2.
Which one is better to take antibiotics or vaccines?
Answer:
Vaccines are better than antibiotics when the disease is prevented by vaccine.
Ex: Tuberculosis, Tetanus, etc.

Question 3.
What questions do you ask on role of mosquitoes and houseflies in spreading the diseases like Malaria and Swine flu?
Answer:

1. How can we be safe, without affected by malaria and typhoid?
2. Which organisms spread diseases like malaria and typhoid?

Question 4.
What is ‘Triple Antigen Vaccine’?
Answer:
D.P.T vaccine which prevents

1. Diptheria
2. Pertusis (Wooping cough)
3. Tetanus

Question 5.
What is Tet – vac?
Answer:
Tet – vac is the vaccine that is used to prevent Tetanus.

Question 6.
What is M.M.R vaccine?
Answer:
M.M.R is the vaccine that prevents the

1. Measles
2. Mumps
3. Rubella

Question 7.
Name the vaccine that prevents T.B.
Answer:
B.C.G (Bacillus Cardio Gram)

Question 8.
What is the mode of transmission of Dengue disease?
Answer:
Aedes Mosquitoes spread Dengue disease.

8th Class Biology 3rd Lesson Story of Microorganisms 2 2 Marks Important Questions and Answers

Question 1.
Mention different questions to know about antibiotics.
Answer:

1. What are antibiotics?
2. In which year penicillin was announced as antibiotic?
3. Can antibiotics destroy the viruses?
4. Write different types of antibiotics.

Question 2.
Prepare different questions to know the importance of vaccines.
Answer:

1. Name the scientist who invented vaccines first.
2. What type of materials used for preparation of vaccines?
3. Name the vaccine which is used to prevent rabies.
4. Name the disease which is eradicated by vaccine.

Question 3.
Ask different questions about the significance of microbes.
Answer:

1. Name different nitrogen fixing microbes.
2. Can all microbes useful to mankind?
3. What will happen if vaccines are not invented?
4. Write about significance of microbes.

Question 4.
Make a sketch of Nostoc.
Answer:

Question 5.
How is preservation of food helps us?
Answer:

1. Preservation prevents spoilage of food.
2. It helps us to store food for a longer time without spoilage.
3. Variety of food items may be available in off seasons also.

8th Class Biology 3rd Lesson Story of Microorganisms 2 4 Marks Important Questions and Answers

Question 1.
Which one is better to take antibiotics or vaccines? Why?
Answer:
Antibiotics are small molecules or compounds that are effective in treating infections caused by organisms such as bacteria, fungi and protozoa. Some antibiotics act by killing the bacteria while others prevent the bacteria from multiplying, leaving your own immune system to ‘mop them up’.
Vaccines are dead or inactivated organisms or compounds that are used to provide immunity to a particular infection or disease.
Vaccines are used to prevent infection, particularly viral infections. Vaccines are produced from portions of viruses or viruses that are rendered harmless.
The killed or modified virus is introduced into the body where it stimulates part of the body’s natural defenses against infection without causing the illness itself.
Because of this, if the body is exposed to the specific virus in the future, it will recognize it and can fight the infection off much more quickly and effectively, meaning that you don’t succumb to the illness.
Hence vaccines are better than antibiotics when the disease is prevented by vaccine. Ex: Tuberculosis, Tetanus, etc.

Question 2.
Refrigerator helps us in saving health and money. Can you explain?
Answer:
Food and drink, being organic in origin, does not last forever. Shortly after food is bought or prepared it will begin to spoil, quickly becoming inedible through the effects of bacteria. By lowering the temperature of the food through refrigeration, you can slow or even temporarily halt the effects of bacteria, making the food stay edible longer.we can also transport fruits vegetables and other food items up to long distances by using refrigerators. Refrigerator is more useful to keep vaccines and medicines for long time. Hence we can save money and as well as health.

Question 3.
Take root nodules of any pulse or leguminous plants crush on a slide, and draw a rough sketches of what you observe under microscope.
Answer:

Question 4.
Can you give some important key points you noticed that scientists followed in their inventions and discoveries?
Answer:
Invention of microscope is most important one to find out microorganisms. Basing on this several inventions were made, which break the unsolved problems since 400 years. This credit goes to Antonie van Leeuwenhoek who invented single lens powerful microscope, which could magnify the object 300 times. His curiosity and skill of making powerful lenses were the secrets of this invention of powerful microscope.
Dr. Alexander Flemming observed some fungi were preventing the growth of bacteria in his experiments. He separated the substances released by the fungus and tested it on some other disease causing bacteria. This substance also killed many other diseases causing bacteria and named it as Pencillin. The discovery of pencillin paved the way to the discovery of many antibiotics like streptomycin, erythromycin etc.
After several attempts Ross suddenly realized that he used the wrong species of mosquitoes in his experiments. His assistant brought larvae, which hatched to several dappled winged mosquitoes. Delighted with this capture Ross identified Anopheles mosquito is the host for malarial parasite.

Question 5.
Which invention is most important one related to microorganisms? Can you explain the reasons why it is so important?
Answer:
Invention of microscope is most important one to find out microorganisms. Basing on this several inventions were made, which break the unsolved problems since 400 years. This credit goes to Antonie van Leeuwenhoek who invented single lens powerful microscope, which could magnify the object 300 times. His curiosity and skill of making powerful lenses were the secrets of this invention of powerful microscope. Later several microbes were identified by using microscopes. This provides a good source to recognize several diseases and treatment by vaccines and antibiotics.

Question 6.
What are antibodies? When do they develop? How they help us?
Answer:
Whenever a disease causing microorganisms enter in our body, it produces some defenders to fight against them, these are called antibodies. The lymphocytes of white blood cells develop antibodies against to the antigen of pathogen. Antibodies fight the disease causing microorganisms and make resistant to particular strains. Antibodies are used by the immune system to identify and neutralize foreign objects such as viruses and bacteria.

Question 7.
If there are no microorganisms on the earth what will happen?
Answer:
Microorganisms are present everywhere, they are to be found in air, water, soil within the bodies of animals and plants. Some microorganisms are very useful and help us in many ways while some of them are harmful. Microorganisms are most essential to maintain inorganic and organic cycles, to give freshness to the nature by degrading waste organic matter and as well as to fight against harmful microorganisms. Hence no life will be sustained in the nature if there are no microorganisms on the earth.

Question 8.
Prepare a table showing some of plant diseases, causative microorganisms and mode of transmission.
Answer:

Name of the plant disease	Causative microorganisms	Mode of transmission
1. Citrus canker	Bacteria, Xanthomonoss citri	Air
2. Red rot of sugarcane	Fungi	Air, seedlings
3. Tikka disease of groundnut	Fungi	Air, seeds
4. Tobacco mosaic	Virus	Insects
5. Smut disease of rice	Fungus	Air

Question 9.
If there are no microorganisms on the earth what will happen?
Answer:

1. If micro organisms are not present on earth the earth will be full of dead organisms and plants.
2. The plants can not fix the atmospheric nitrogen in the soil.
3. We can not get fermented products.
4. The life becomes impossible on the earth.

8th Class Biology 3rd Lesson Story of Microorganisms 2 Important Questions and Answers

Question 1.
Many people to. a colony are suffering from ‘Cholera’. What do you think could be the reason?
Answer:

1. The main reasons for the spread of cholera is consumption of contaminated food and water. House flies rapidly spread this disease among people.
2. I would imagine that people were not following personal hygienic practices before consuming food and water.
3. Perhaps people might not be keeping their surroundings clean and hygienic.
4. Perhaps the people might have poor sanitary conditions.

Question 2.
Suggest any two methods of fish preservation.
Answer:

1. Drying
2. Smoking
3. Canning
4. Chilling

Question 3.
What is symbiosis? Give two examples for it.
Answer:

1. In Greek language, symbiosis means “living together”.
2. Symbiosis is any type of a close and long term biological interaction between two different biological organisms in which both are benefited.
3. Examples for symbiotic relationship is Rhizobium. Rhizobium bacteria is living in the root nodules of legume plants.
4. Rhizobium fixes the atmospheric nitrogen in the form of nitrates which are very essential for the growth of plants. Inturn legume plants provide shelter for Rhizobium. Here, both are benefited.
5. Another example for symbiosis is Lichens. Here, we can see the symbiotic relationship between Algae and Fungi.

Question 4.
In an experiment if we keep the dosa dough in Bacillus free chamber, what changes can you observe in the dosa dough after one day?
Answer:

1. Fermentation of dosa dough will not take place.
2. The volume of the dosa dough will not increase and it will not turn into spongy texture.

Question 5.
Classify the given below microorganisms into useful and harmful microorganisms.
Plasmodium, Lactobacillus, Rhizobium, Pencillium, Yeast, Virus.
Answer:
Useful microorganisms:

1. Lacto bacillus
2. Rhizobium
3. Pencillium
4. Yeast

Harmful microorganisms:

1. Plasmodium
2. Virus.

Question 6.
What will happen if we add butter milk to chilled milk?
Answer:
If we add a few drops of butter milk to chilled milk 1) the milk will not turn into curd. It is because, cold milk won’t provide the conditions to grow lactobacillus. Hence, curd will not be formed.

Question 7.
If you are going to conduct a quiz on micro-organisms, what type of questions do you prepare for the quiz programme?
Answer:

1. Can you name the scientist who discovered the pencillin?
2. Name the bacteria that converts the milk into curd.
3. Can you name the food items that can be preserved through pasteurisation?
4. Can you name the microorganism which is very helpful in the preparation of alcohol?

Question 8.
What is the name of the nitrogen fixation bacteria in the root nodules?
Answer:
Rhizobium

Question 9.
What precautions do you take to avoid diseases?
Answer:

1. We should consume boiled, purified water and healthy food daily.
2. Keep our surroundings neat and clean.
3. We should take vaccines to prevent different diseases.
4. We should practice personal hygiene and good sanitary habits.

Question 10.
Defecation in open areas spreads micro-organisms easily. Write some slogans to conduct a rally to protect us from micro-organisms.
Answer:

1. Keep your country clean by keeping your area clean.
2. Stop being so open….. else everything is broken.
3. Use a toilet. Don’t let anything spoil it,
4. Use a toilet – to achieve Swach Bharath.

Question 11.
Draw a table of microorganisms and its diseases.
Microorganisms : Virus, Bacteria, Protozoa, Arthropods.
Disease: Scabies, Malaria, Polio, Typhoid.
Answer:

Microorganism	Disease
1. Virus	Polio
2. Bacteria	Typhoid
3. Protozoa	Malaria
4. Arthropods	Scabies

Question 12.
Why is the idly or dosa batter prepared one day before?
Answer:
If we prepare idly or dosa batter one day before, fermentation occurs in it, carbondioxide gas fill the batter increasing it’s volume and makes it spongy.

Question 13.
Read the following passage and answer the following questions.
When an infected person sneezes or coughs, the pathogens enter the air. When this air containing pathogens enters into the body of a healthy person, it may cause cold. These type of diseases which spread from infected people to healthy ones are known as “communicable diseases”. These get spread through air, water, food or through physical contact of infected person or through insects like houseflies and mosquitoes. Common cold, conjunctivitis, typhoid, smallpox, chickenpox, swine flu, tuberculosis are some examples of communicable diseases. Some insects and animals carry diseases causing microorganisms. They are called as ‘vectors’. The microorganism ‘plasmodium’causes malaria. The female Anopheles mosquito carries plasmodium and thus is a vector. Mosquitoes are vectors for other diseases as well. By controlling mosquitoes, we can prevent dis¬eases caused by them. Mosquitoes breed in stagnant water. We should be careful not to let water collect anywhere in our surroundings, including left over waste pots, waste flower pots, tyres, bowls etc.
a) What are communicable diseases? Give examples.
b) What are vectors?
c) Name the vector which spreads malaria.
d) How do you prevent spread of malaria?
Answer:
a) The diseases which spread from infected people to healthy ones are known as “communicable diseases”.
Eg: Conjuctivitis, Common cold, Smallpox, Rubella, Typhoid, etc…
b) The insects and animals which carry disease causing microorganisms are called as “vectors”.
c) Female Anopheles mosquito.
d) By controlling mosquito population.

These AP 10th Class Maths Chapter Wise Important Questions Chapter 5 Quadratic Equations will help students prepare well for the exams.

AP State Syllabus 10th Class Maths 5th Lesson Important Questions and Answers Quadratic Equations

Question 1.
If b² – 4ac ≥ 0, then write the roots of a quadratic equation ax² + bx + c = 0
Solution:
When b² – 4ac ≥ 0 then the roots of given quadratic equation ax² + bx + c = 0 are
\(\frac{-b+\sqrt{b^{2}-4 a c}}{2 a}\) and \(\frac{-b-\sqrt{b^{2}-4 a c}}{2 a}\)

Question 2.
Find the Quadratic polynomial with zeroes -2 and \(\frac{1}{3}\)
Solution:
Let α = -2; β = \(\frac{1}{3}\)
= -2 + \(\frac{1}{3}\) = \(\frac{-6+1}{3}=\frac{-5}{3}\)
α.β = -2. \(\frac{1}{3}\) = \(\frac{-2}{3}\)
Quadratic polynomial is [x² – (α + β )x + αβ ] = [x² + \(\frac{5}{3}\)x – \(\frac{-2}{3}\)
the quadratic polynomial will be 3x² + 5x – 2

Question 3.
Two angles are complementary and one angle is 18° more than tne other, then find angles.
Solution:
Let smaller angle be x°
bigger angle be y°
Since these two angles are comple-mentary
x + y = 90° ………… (1)
Since bigger angle is more than smaller angle
by 18°, y – x = 18° ………….(2)
By solving (1) & (2), we get x = 36°, y = 54°

Question 4.
Find the discriminant of the quadratic equation 2x² – 4x + 3 = 0.
Solution:
Discriminant of standard quadratic equation
ax² + bx + c = 0 is b² – 4ac
Now comparing the given quadratic equation 2x² – 4x + 3 = 0 with stan¬dard form of quadratic equation.
We get a = 2, b = -4, c = 3 then its discriminant = b² – 4ac
= (-4)² – 4(2) (3)
= 16 – 24 = -8
∴ Discriminant = -8.

Question 1.
Find the roots of x + \(\frac { 6 }{ x }\) = 7, x ≠ 0
Solution:
x + \(\frac { 6 }{ x }\) = 7 ⇒ \(\frac{x^{2}+6}{x}\) = 7
⇒ x² – 7x + 6 =0
⇒ (x – 6) (x – 1) = 0
⇒ x = 6 or 1
Roots = 6, 1

Question 2.
Length of a rectangle is 2 units greater than its breadth. If the area of the rect-angle is 120 sq. units then find its length.
Solution:
Let breadth of the rectangle = x
Length = x + 2 ,
Area = 120 sq. units
x(x+2) = 120
x2 + 2x- 120 = 0
(x + 12) (x- 10) = 0
x = – 12 or 10
Breadth cannot be negative
∴ Breadth of the rectangle = x
= 10 units
∴ Length = x + 2 = 10 + 2 = 12 units

Question 3.
Find the zeroes of the quadratic poly-nomial x² – x – 30 and verify the rela¬tion between the zeroes and its co¬efficients.
Solution:
Given quadratic polynomial = x² – x – 30
⇒ x² – x – 30 = 0 = 0
x² – 6x + 5x – 30 = 0
⇒ x(x – 6) + 5(x – 6) = 0
⇒ (x – 6) (x + 5) = 0
⇒ x – 6 = 0
x = 6
x + 5 = 0 x = -5
∴ Zeroes are α = 6 and β = – 5
Sum of zeroes = α + β = \(\frac{-\mathrm{b}}{\mathrm{a}}\)
⇒ 6 – 5 = \(\frac{-(-1)}{1}\)
⇒ 1 = 1
Product of zeroes α + β = 6(-5) = \(\frac{\mathrm{c}}{\mathrm{a}}\)
= -30 = \(\frac{-30}{1}\)
Hence the relation was verified.

Question 4.
Find the roots of the quadratic equa¬tion (3x – 2)² – 4(3x – 2) + 3 = 0.
Solution:
(3x – 2)² – 4(3x – 2) + 3 = 0
9x² + 4 – 12x – 12x + 8 + 3 = 0
9x² – 24x +15 = 0
3x² – 8x + 5 = 0
3x² – 3x – 5x + 5 = 0
3x(x – 1) – 5 (x – 1) = 0
(x- 1) (3x – 5) = 0
x = 1 (or) x = \(\frac{5}{3}\)
Roots of quadratic equation are 1, \(\frac{5}{3}\).

Question 5.
Two numbers differ by 4 and their product is 192. Find the numbers.
Solution:
Let the larger number be ‘x’
Since the difference of two numbers is 4,
Then the smaller number is (x – 4)
Their product = x(x – 4)
Given that product = 192
∴ x(x – 4) = 192
⇒ x² – 4x – 192 = 0
⇒ x² – 16x + 12x- 192 = 0
⇒ x(x – 16) + 12(x – 16) = 0
⇒ (x – 16)(x + 12) = 0
⇒ x = 16 or x = -12
If x = 16, then x – 4 = 16 – 4 = 12
then the numbers are 16 and 12.
If x = – 12, thenx-4 = – 12 – 4 = – 16
then the numbers are – 12 and – 16.

Question 1.
Find the roots of the equation 5x² – 7x – 6 = 0 by the method of completing the square.
Solution:
Given that 5x² – 7x – 6 = 0
5x² – 7x = 6
x² – \(\frac{7}{5}\)x = \(\frac{6}{5}\)
⇒ x².2.\(\frac{7}{10}\)x = \(\frac{6}{5}\)
adding \(\frac{49}{100}\) on the both sides

The roots of the quadratic equation are 2 and \(\frac{-3}{5}\)

Question 2.
Find the roots of the quadratic equation 3x² + 11x + 10 = 0 by method of – completing the Square.
Solution:
Given : 3x² + 11x + 10 = 0
Dividing both sides by 3.

Question 3.
Solve the Quadratic equation 9x² – 9x + 2 = 0 by the method of com-pleting the square.
Solution:
Given : 9x² – 9x + 2 = 0
⇒ x² – x + \(\frac{2}{9}\) = 0
⇒ x² – x = –\(\frac{2}{9}\)

These AP 8th Class Social Studies Important Questions 16th Lesson Abolition of Zamindari System will help students prepare well for the exams.

AP State Syllabus 8th Class Social 16th Lesson Important Questions and Answers Abolition of Zamindari System

Question 1.
While the slogan Land to the Tiller meant that the tenant will get the land, what will happen to the landless agricultural worker, who works for wages?
Answer:
The conditions of the tenants were somehow improved. But the conditions of the landless agricultural workers remain the same. They are still in the same poverty.

Question 2.
Some people feel that the land reform laws only tried to help the landlords. Do you agree with them?
Answer:
Yes, I agree with them.
Giving compensation to the zamindars, continuing them as owners of the Khudkasht etc., reveal this.

Question 3.
Do you think there was any other way of giving gainful employment to the rural poor?
Answer:
At present there are many ways of giving gainful employment. But there were less opportunities at that time. The British destroyed the occupational system of India. The people lost all their chances of employment. So I think there were no other ways.

Question 4.
How many acres of land does a family of four persons need to get a decent living in your area? (Give the figures separately for both irrigated and unirrigated land.)
Answer:
A family of four persons needs 8 acres of irrigated land and 30 acres of dry land to get a decent living in our area.

Question 5.
To what extent did the landless service castes benefit from these reforms?
Answer:
They were not benefited in any way from these reforms.

Question 6.
Why did the Land Ceiling Act become necessary?
Answer:
Many Acts after independence have not changed the ownership of lands in India. It changed Zamindars as landlords, landlords as big farmers. But it did nothing to the common poor.
The ownership of the land was only a few hands. So the Land Ceiling Act became necessary.

Question 7.
Why was the end to vetti important for all kinds of peasants?
Answer:
‘Vetti’ is a black spot for humanity. Many struggles were led against this. So the end of it was important for all kinds of peasants.

Question 8.
Is vettis prevalent still in your region ? If it is there, prepare a report?
Answer:
No, at present vetti is not prevalent in my region. But it is not completely abolished from our society still in some villages the poor people who are taken money from land lords for their needs, they are unable to repay that, due to this they are working in their lands as bounded labourers.

Question 9.
Why do you think the spirit of Bhoodan did not help to end landlordism and get land to the tiller?
Answer:
In this movement the landlords should donate their land with their own interest. This kind of humanity was not in them. Some of them donated only ‘Banjar’ and ‘Porambok’ lands only instead of cultivated land. 90% of the fertile lands were remained with the landlords. So the movement did not help to end landlordism and get land to the tiller.

These AP 10th Class Social Studies Important Questions 20th Lesson Post – War World and India will help students prepare well for the exams.

AP State Syllabus 10th Class Social 20th Lesson Important Questions and Answers Post – War World and India

10th Class Social 20th Lesson Post – War World and India 1 Mark Important Questions and Answers

Question 1.
Expand UNICEF.
Answer:
United Nations International Children’s Emergency Fund.

Question 2.
Who formulated the ‘NATO’, the military alliance?
Answer:
United States of America / America.

Question 3.
Why do you think the cooperation between India and Bangladesh is vital for both countries?
Answer:

1. Both the countries have cooperated on the economic front and river water.
2. Bangladesh Is an integral part of the In¬dian look East Policy’ to link up South Asia via Myanmar and both have cooperation on disaster management.

Question 4.
What is the boundary line between China and India?
Answer:
Mc Mahon Line is the boundary line between China and India.

Question 5.
Explain the terms bipolarity and unipolarity.
Answer:

1. Under the leadership of USA and USSR, the world divided into two power blocks after World War – II with different ideologies. This situation is called as bipolarity.
2. After the collapse of the USSR, only the USA remained as a super power in the world. This situation is called as unipolarity.

Question 6.
What is the non-alignment movement?
Answer:
The policy followed by newly independent countries after Second World War, without involving in any of the military blocks, following neutrality in international politics.

Question 7.
What is Cold War?
Answer:
The absence of real fighting as in traditional wars is called the cold war. The cold war characterized by the intense tension between the USA and the USSR during 1945 to 1991.

Question 8.
Write any two objectives of U.N.O.
Answer:

1. Maintains peace and security.
2. Improvement of educational and health facilities.
3. Protecting human rights.
4. Respecting international law

Question 9.
What is Panchsheel?
Answer:
In 1954 a treaty was held between India and China which incorporated the principles of non-interference in other’s internal affairs and respect for each other’s territorial unity, integrity and sovereignty. These principles are known as Panchsheel.

Question 10.
How was the USSR escaped from the Great Depression?
Answer:
The USSR escaped from the Great Depression:

1. USSR was not integrated with international markets.
2. It had a planed economy.
3. Maintained a balance between demand and supply.

Question 11.
Observe the following graph and answer the questions ‘a’ and ‘b’.
a) During 1955-2005, which country had the highest number of warheads?
Answer:
USSR / Russia.

b) What is the reason for decreasing in nuclear stockpiles after 1985?
Answer:

1. Tremendous public pressure.
2. Ban on nuclear tests.

Question 12.
What is the aim of “Zionist movement”?
Answer:
The aim of the Zionist Movement is to unite the Jews spread across the world and to reclaim Palestine their homeland and build a separate state for the Jews.

Question 13.
Write any two principles of Panchasheel.
Answer:

1. Respect for each other’s sovereignty and territorial integrity.
2. Non-interference in the internal affairs of other countries.
3. Non-aggression and settlement of dis-putes with mutual understanding.
4. Endeavor to achieve cooperation and mutual respect in international relationships.
5. Promoting peaceful coexistence.

Observe the following map and answer questions 14 & 15.

Question 14.
What does the above map tell?
Answer:
The given map tells about cold war military alliances.

Question 15.
Why is united kingdom called an Island?
Answer:
United kingdom is called as an Island because it is covered by water on all the sides.

Question 16.
What are the basic principles of the UNO?
Answer:
The basic principles of the United Nations Organisation are preserving peace, upholding human rights, respecting international law and promoting social progress.

Question 17.
What were the three of the most important processes?
Answer:
Even as the war-devastated countries rebuilt their economics, the world saw some new processes in place. Three of the most important processes were the establishment of the United Nations, Cold War and Decolonisation.

Question 18.
Who drafted a charter for the formation of the UNO?
Answer:
The principle Allied countries like Britain, France, the USA, the USSR and China drafted a Charter for the formation of the UNO even as the war drew to an end.

Question 19.
Write the number of members of the UNO.
Answer:
At the time of its establishment UN had membership of 54 countries and today (2018 ) there are 193 countries.

Question 20.
Which is the main body in the UNO?
Answer:
The General Assembly.

Question 21.
Who are the permanent members of the Security Council?
Answer:
China, France, United Kingdom; USSR (now Russia) and USA.

Question 22.
Explain the ‘Veto Power’.
Answer:
Any decision taken by Council can be vetoed (made invalid or rejected) by the intervention of even anyone of these countries.
(OR)
The power is given to the permanent members to accept or reject any proposal in the UNO.

Question 23.
Name some third world countries.
Answer:
Countries emerging from colonial domination like Vietnam, Korea, Angola, and Afghanistan.

Question 24.
Who got independence in 1960 and what happened then?
Answer:
The Belgian colony in Africa, Congo, got independence in 1960. But its radical communist leader, Patrice Lumumba, was killed in 1961, allegedly at the behest of US spy agency called CIA.

Question 25.
When did Angola become independent?
Answer:
Angola became independent from Portugal in November 1975.

Question 26.
What was the place of the USSR in space race ?
Answer:
The USSR put the first satellite Sputnik and the first human Yuri Gagarin in space.

Question 27.
Whom did the US send to the moon?
Answer:
The US sent Neil Armstrong and others to the Moon in 1969.

Question 28.
What were the core concerns of the people of recently de-colonised?
Answer:
The core concerns of people, especially those who were recently de-colonized like poverty, disease, inequality and colonialism were not addressed by any of these issues of contention.

Question 29.
What does West Asia refer to?
Answer:
West Asia refers to the region between Europe and Asia. The term Middle East is also used to describe this area.

Question 30.
What was called the ‘Zionist Movement’?
Answer:
A movement had developed among the Jews called the ‘Zionist Movement’ which called for uniting Jews spread across the world and to reclaim Palestine as their homeland and build a separate state of Jews.

Question 31.
Who are Palestinians?
Answer:
Palestinians were mostly Arab Muslims.

Question 32.
When and where was the PLO established?
Answer:
The PLO was established in 1964 in Jordon and added a new dimension by bringing together all different Arab factions. Its aim was to regain the land it lost, without violence.

Question 33.
Why did the US become unpopular?
Answer:
The US became unpopular because it supported undemocratic regimes in the Middle East so that the oil resources were available to the US and its allies.

Question 34.
What is the main bone of contention between India and Pakistan?
Answer:
The main bone of contention between the two countries is Kashmir.

Question 35.
Expand POK.
Answer:
Pakistan Occupied Kashmir.

Question 36.
Who was ‘U Thant’?
Answer:
U Thant was the then Secretary-General of UNO.

Question 37.
What was ‘Mukti Bahini ?
Answer:
Supporters of Mujibur Rahman organized a liberation struggle in the form of ‘Mukti Bahini’.

Question 38.
Who signed Shimla Agreement?
Answer:
Zulfikar Ali Bhutto and Prime Minister Indira Gandhi.

Question 39.
Who fought the Kargil War?
Answer:
India and Pakistan fought the Kargil war.

Question 40.
When was Bangladesh liberated?
Answer:
Bangladesh was liberated from Pakistan with the help of Indian troops in 1972.

Question 41.
What is IPKF?
Answer:
It is the Indian Peace Keeping Force in Sri Lanka.

Question 42.
What is a proxy war?
Answer:
A war instigated by a major power that does not itself participate.

10th Class Social 20th Lesson Post – War World and India 2 Marks Important Questions and Answers

Question 1.
Observe the following map and answer the questions:
a) Name any two countries of ’NATO’ at the founding (establishment) time.
Answer:
France and Iceland.

b) Name any two countries which were under the ‘WARSAW’.
Answer:
Poland and Czekoslovakia.

Question 2.
Read the passage and answer the following questions.

To emphasise the determination for peace, Jawaharlal Nehru formulated his renowned Panchsheel principles :
a. Respect for each other’s sovereignty and territorial integrity.
b. Non-interference in the internal affairs of other countries.
c. Non-aggression and settlement of disputes with mutual understanding.
d. Endeavour to achieve cooperation and mutual respect in international relationships.
e. Promoting peaceful co-existence.

i) In between which countries, the Panchsheel was formulated?
Answer:
India and China.

ii) Mention any two principles of Panchsheel.
Answer:

1. Respect for each other’s sovereignty and territorial integrity.
2. Non-interference in the internal affairs of other countries.
3. Non-aggression and settlement of disputes with mutual understanding.
4. Endeavour to achieve co-operation and mutual respect in international relationships.
5. Promoting peaceful co-existence.

Question 3.
Read the following paragraph and answer the given questions.

Both USA and USSR were in the possession of nuclear weapons but knew very well neither would be the winner in a nuclear war. Yet, they formed military and strategic alliances – the west formalised its alliances in an organisation known as North Atlantic Treaty Organisation (NATO) in 1949. To counter this, Communist nations made similar alliances and signed the Warsaw Pact. In addition to this, U.S. established regional military and strategic alliances like South East Asian Treaty Organisation (SEATO) and Central Treaty Organisation (CENTO).

a) What is the counter Pact to NATO?
Answer:
Warsaw pact.

b) Name the two regional military and strategic alliances of the USA.
Answer:
South-East Asian Treaty Organization (SEATO) and the Central Treaty Organization (CENTO).

Question 4.
Read the understand the following text to answer the question given below.

The UN thus started with a twin objective of ensuring lasting peace and human development. At the same time it recognised the autonomy of states and promised not to interfere in any internal affair of a country except in cases mandated by serious human rights violation or threat to world peace.

Comment on the objectives of the UN.
Answer:

1. United Nations Organisation has the objectives of ensuring lasting peace and human development.
2. The UN protects the human rights.
3. It recognized the autonomy of states and promised.
4. Except in extreme conditions UN does not interfere in the internal affairs of any country.

Question 5.
Observe the following Map and answer the questions given below.
A) Write any two countries which are sharing boundary with India on the North-eastern side.
Answer:
Nepal, Bhutan, Bangladesh.

B) Mention two countries which are sharing sea-boundary with India.
Answer:
Srilanka, Maldives.

Question 6.
Give an account of the present status of relations between India and Pakistan.
Answer:

1. The differences regarding the Kashmir issue have been still continuing.
2. Along with the constant efforts to establish peace, India is trying to maintain good relations in the fields of trade and commerce, sports and tourism with Pakistan.

Question 7.
Analyse the below graph and write your observations.

Answer:

1. After World War II the world has been divided into two main political camps.
2. USSR led socialistic camp.
3. USA led the capitalist block.
4. Both USSR and USA competed for nuclear stockpiles.
5. By 1965 US had more nuclear stockpiles.
6. USSR competed with USA and increased its stockpiles. By 1985 it has the highest nuclear stockpiles.
7. By 2005 both countries reduced their stocks of nuclear weapons.

Question 8.
What do you understand by the Cold War?
Answer:
Cold War: Ideological differences between America and Russia is called Cold War.

1. It is an indirect war. There is no real war.
2. It created mutual hatred, misbelief and enmity between Communist Russia and Capitalist USA.
3. Both the USA and the USSR were in the possession of nuclear weapons.
4. They maintained secret alliances and treaties. Ex: NATO, WARSAW.
5. Always they created a tension of war.
6. As the rival powers accumulated destructive weapons the world was constantly threatened by a nuclear holocaust.
7. People of all countries lived in constant fear of war.

Question 9.
What suggestions do you give to maintain friendly relations with neighbouring countries?
Answer:

1. No country at the present time can afford to exist in isolation.
2. From its very inception, they have to maintain a friendly relation with their neighbouring countries.
3. Maintain mutual confidence and trust based on the heart to heart.
4. Rejects the role of military power and committed to peace.
5. Should have greater understanding and cooperation among the people of neighbouring nations.
6. Should maintain friendly relations with neighbouring countries and blossom secularism, democracy and freedom here.
7. We should share peace and prosperity with the neighbouring countries.

Question 10.
Write briefly about the present relations between India and Pakistan.
Answer:
Pakistan was separated from India and formed in 1947 as an Independent country. It is still supporting separation movements in Jammu and Kashmir in India. Pakistan is sending extremists to India to create some instability. India accuses that Pakistan is encouraging to send fake notes to India. It is violating the cease-fire conditions and causing for civilians and soldiers’ deaths. Modi visited Pakistan and discussed with the Prime Minister but the problem is not solved. India answered with surgical strikes. It was a great loss for Pakistan. I think both countries should sit together and solve the problems to concentrate on development.

Question 11.
Suggest measures for better relations between China and India.
Answer:
Since 1962 India, China relations are not good and fair.

• Each should respect another country.
• Panchsheel principles should be followed.
• Settle disputes mutually with bilateral discussions.
• Both countries should understand that they lose much more if there would be a war.

Question 12.
Read the map and answer the following questions.
a) Name the countries that did not enter into any of the military alliances.
Answer:
Sweden, Finland, Switzerland and Ireland were the countries that did notenter into any of the military alliances.

b) State your analysis on the above map.
Answer:

1. Most of the East European countries signed on Warsaw pact.
2. Most of the West European countries signed on NATO pact.

Question 13.
How was the USA after World War – II?
Answer:
The USA suffered less as the war was not fought on its territories. In fact, the Second World War helped the USA grow out of its economic misery caused by the Great Depression. Far from the theatres of war, the industries and agriculture of the USA prospered. This ensured full employment and high productivity in the US during the Second World War. In March 1945, the US President, Harry Truman, said, ‘We have emerged from this War the most powerful nation in the world – the most powerful nation, perhaps, in all history.

Question 14.
How many organs are there in U.N.O? What are they?
Answer:
There are six organs in U.N.O.

1. The General Assembly
2. The Security Council
3. The Trusteeship Council
4. The Economic and Social Council
5. The International Court of Justice
6. The Secretariat

Question 15.
Explain the organs of the U.N.O.
Answer:
The UN works through six different organs. Each of these organs has specific functions like maintaining peace and security, improving education and health facilities, alleviating poverty, providing justice in the context of international crimes and so on. Some bodies responsible for these functions include International Court of Justice located in Hague; the World Health Organisation located at Geneva, the United Nations Educational, Scientific and Cultural Organisation functioning from Paris, and United Nations Children’s Emergency Fund functioning from New York.

Question 16.
What are the specialised agencies of U.N.O.?
Answer:
The specialised agencies of U.N.O. are

1. UNICEF,
2. UNESCO,
3. FAO,
4. ILO,
5. IBRD,
6. IMF,
7. WHO,
8. UPU

What are the achievements of UNO?
Answer:

1. UNO has under taken complex operations like peace making, peace keeping, humanitarian assistance and disarmament etc.
2. UNO intervened the issues of struggles of many countries and prevented them to more towards war – Ex: Cyprus issue.
3. It encouraged bilateral discussions among countries to solve issues. Ex: Kashmir issue.
4. Disarmament, CTBT etc. are the achievements of UNO that helped to reduce the piling up of armaments.
   Ex:
   1. UN helped to defuse Cuban missile crisis (1962), Middle East crisis (1973).
   2. UN-sponsored peace settlement ended Iran – Iraq war in 1988.
   3. UN-sponsored negotiations led to withdrawal of soviet troops from Afghanistan.

Question 17.
Which were the worst affected countries in World War – II?
Answer:
The worst affected were the European countries especially the USSR, Poland and Yugoslavia which lost about 20% of its population. In economic terms to the USSR and other European countries lost heavily with the destruction of cities.

Question 18.
Why had the World War – II been fought? (OR)
What led to the formation of UNO?
Answer:
The Second World War had been fought on the principles of peace, democracy and freedom of nations in contrast to the Nazi ideas of dictatorship and Imperialism. Thus, the first task was to establish a global organisation that would ensure peace and development in all nations. This led to the formation of the United Nations Organisation.

Question 19.
Is the UNO successful in preventions wars?
Answer:
While the UN has been doing commendable work in the area of education, health, cultural exchange and protection of heritage, it has been less successful in preventing wars. It has often been held hostage to the ambitions of the super-powers that sought world control.

Question 20.
Which is called a Cold war?
Answer:
For more than forty-five years after the Second World War, a rather strange war was fought between the two blocks. It was a war in which the principal contenders did not physically attack each other or fight each other directly and hence, there was no ‘hot’ war. Instead, a War was fought behind closed doors through propaganda and words. It is called the Cold War.

Question 21.
Why is it called the Cold war?
Answer:
It is called the Cold War simply because of the absence of a real fighting as in traditional wars.
This Cold War characterised by intense tension between the United States and the USSR, influenced and shaped almost everything that happened in the world between 1945 and 1991.

Question 22.
What was the result of Afghanisthan invasion by the USSR?
Answer:
In 1971 the USSR invaded Afghanistan to install a friendly government there. The US in turn provided armed support to Afghan rebels who were also religious extremists. A prolonged civil war ensued and as the USSR decided to withdraw from Afghanistan in 1985 that country fell to religious extremists led by the Taliban which now turned against the USA.

Question 23.
How did the Alliances help the superpowers?
Answer:
The alliances helped superpowers which wanted to expand their influence to gain access to

• the vital resources like oil and minerals
• markets for their products and places to safely invest their capital
• military bases to launch their troops and weapons
• spread their ideology and
• gain economic support, to pay huge military expenses.

Question 24.
Explain the significance of the Bandung conference.
Answer:

1. In 1955 at Bandung in Indonesia a conference was held.
2. It was the first Asio-African conference represented by 29 nations.
3. The most important leaders of this conference were Pandit Jawaharlal Nehru the then Prime Minister of India, Gamal Abdul Nasser the leader of Egypt and Josip Broz Tito the leader of – Yugoslavia.
4. Pt. Nehru was acknowledged as the chief spokes person.
5. It paved the way for Non-Aligned Movement (NAM).

Question 25.
What are often described as the West Asian Crises? Write about them.
Answer:
The conflicts that developed between Arabs and Jews are often described as the West Asian Crises. It was mainly related to the occupation of Palestine. Palestine which was inhabited by Arabs was under the control of Britain before the Second World War. In it is situated Jerusalem which is a holy city for Jews, Christians and Muslims alike.

Question 26.
Write about the Taliban of Afghanistan.
Answer:
The Taliban which took over Afghanistan after the withdrawal of Soviet troops similarly established an extremist Islamic state. These states tried to force all people to strictly follow the rules laid down in religious texts. In many cases, this meant the denial of basic freedom and equality of opportunity to women and to religious minorities.

Question 27.
Write about Mikhail Gorbachev.
Answer:
Mikhail Gorbachev in the USSR tried to transform the politics of USSR by making it more open and bringing about radical changes. He was a liberal who introduced certain reforms for the revival of their economy and promoted healthy relations with the West. The reforms introduced by the open regime are often described as ‘Glasnost’and ‘Perestroika’.

Question 28.
Study the graph and answer the following questions.
1. Which country had spent more on Military Expenditure in its GDP?
Answer:
Pakistan had spent more on military expenditure as % GDP.

2. What does the graph show?
Answer:
The graph shows India’s and Pakistan’s Military Expenditures.

3. Analyze the above graph.
Answer:

1. The above graph shows the military expenses of India and Pakistan.
2. In comparison, our country spent much on military than Pakistan.
3. But in GDP values Pakistan spent much on the military in terms of GDP.

Question 29.
Why is China considering India as an adversary?
Answer:
India gave asylum to Dalai Lama, this caused a conflict, and Chinese started considering India as an adversary. Prior to this, a border dispute had surfaced between India and China. China never accepted Mac Mohan Line as a boundary line between China and India. China laid claim to Aksai- chin area in Ladakh region and much of Arunachal Pradesh.

Question 30.
Write about the Indo-China war of 1962.
Answer:
China invaded India in October 1962 violating the peace treaties it signed with India. India was not prepared for this surprise attack and suffered many losses. Eventually, China declared a unilateral ceasefire and withdrew its troops to its pre-war position. It took more than a decade to resume normal relations. Full diplomatic relations were restored only in 1976.

Question 31.
How has the Non-Alignment Movement emerged?
Answer:

1. A large number of developing countries that had attained independence after the World War II, during the cold war era, in order to maintain their hard-won freedom, decided to stay away from the arena of superpower rivalry.
2. Non-Alignment movement emerged under the leadership of India, Egypt and Yugoslavia came into existence which added a new dimension to world politics.

10th Class Social 20th Lesson Post – War World and India 4 Marks Important Questions and Answers

Question 1.
Observe the Europe map and write any two countries from the WARSA pool and any two countries from the NATO pool.
Answer:

NATO Pool	WARSA Pool
USA	Poland
Canada	Albania
Belgium	Romania
Denmark	Bulgaria
France	Flungary, etc.
Portugal
Britain, etc.

Question 2.
Observe the graph given below and answer the following questions.
1. Which country has more nuclear stock piles during 1955-1975?
Answer:
United States of America.

2. What is the number of warheads that United States had in 1965?
Answer:
Nearly 30,000.

3. What led the countries to emerge camps after Second World War?
Answer:

1. Ideological conflicts between US and USSR.
2. For military supremacy and to gain economic supremacy lead the countries to emerge camps after the Second World War.

4. Why the countries decreased their nuclear stockpiles after 1990?
Answer:

1. Realised that war mongering and the consequent arms race only made the world more unsafe and increased the possibility of a disastrous war for all countries.
2. As a result of the pressures the USA and USSR, the main competitors in the arms race, signed on cut down their nuclear arsenal (SALT, START).
3. Cold war came to an end with the collapses of USSR in 1991; is also another reason for this.

Question 3.
What steps both India and China should take to build lasting peace between the two countries?
Answer:

1. Both countries should respect the sovereignty of each other.
2. Border disputes should be resolved peacefully.
3. Diplomatic relations should be enhanced.
4. One country should not treat the other one as its competitor.
5. The spirit of the ‘Panchasheel Pact’ should be followed by both the countries.
6. Friendship should be enhanced through cultural exchange.

Question 4.
Why is peace between India and Pakistan necessary for the development of both countries?
Answer:

1. Both India and Pakistan have nuclear status and in this scenario the need of peace process between them is much more important than ever before.
2. Any kind of conventional armed conflict can change into a nuclear war.
3. So the peace process should be based on the development of both the countries.
4. For social, political and economical development of both the countries, peace should be established between them.

Question 5.
What is the NAM? What are its main objectives?
Answer:
NAM:

1. Not joining in any powerful block either the USA block or the USSR block.
2. Maintaining equal distance and behave independently.

Objectives:

1. Maintain the world peace.
2. Maintain cooperation among the member nations.
3. To prevent any of the newly decolonised independent countries from joining any of the military blocks.
4. Estimate the growing cold war tensions and its impact on the world at large.

Question 6.
What is the role of the UNO in maintaining world peace?
Answer:
In order to build peace in the world the U.N.O. plays its prominent role as below.
The U.N.O. was established on 24th October, 1945.

1. It prevented the Cold War.
2. It succeeded in getting independence to Indonesia from the Dutch.
3. It solved the dispute in Palestine between Arabs and Jews by creating a separate state of Israel for Jews.
4. It succeeded in averting a war between England and Egypt over Suez Canal issue.
5. It created pressure on Russia and the U.S.A. to the reducing of nuclear weapons.
6. It helped Congo to get freedom.
7. U.N. helped to defuse Cuban missile crisis, middle east crisis.
8. UN sponsored peace settlement ended Iran – Iraq war.
9. UN sponsored negotiations led to the withdrawal of Soviet troops from Afghanistan.
10. It helped Cyprus to avert conflict between Greeks and Turks.
11. When Pakistan resorted to aggression over Kashmir it intervened and tried to avert the war between India and Pakistan.
12. It helped to Angola to get independence from Portugal.
13. So far it has been able to prevent a Third World War.

Question 7.
Write a detailed note on West Asian conflicts.
Answer:
Jerusalem is a holy city for Jews, Christians, Muslims alike. The Jews consider Palestine as their Promised Land. The conflict came to ahead in Germany under the Nazis when millions of Jews of Europe were jailed and killed. Zionist movement spread across the world and tried to reclaim Palestine as their homeland. This demand was supported by the Western powers. Both the USA and the USSR wanted to bring this region of massive oil reserves under their control. UN divided into two parts Arab and the Jewish states. The Arabs refused to recognize Israel as a legitimate state. Egypt came in support of Palestine but in 1956 Israel attacked Egypt with the support of Western Powers. Israel withdrew the army. The Palestine Liberation Organization encouraged the Arabs to attack. Israel. Yasser Arafat carried out terrorist attacks. Later he gave up terrorist attacks and agreed to find a peaceful solution. He died in 2004 and the Palestinians are still fighting for their homeland.

Question 8.
Observe the following table and analyze it with regard to the trend of nuclear weapons stockpiles.
Nuclear Weapons Stockpiles (1990 – 2014)

Country	1990	1995	2000	2005	2014
USA	10,904	10,577	8,360	7,700	7,260
Russia / USSR	37,000	27,000	21,500	17,000	7,500

Answer:
The given table is about nuclear weapons stockpiles during the period 1990-2014. In this table the superpowers United States of America and Union of Soviet Socialist Republic are compared. In the beginning, the frequency of period is five years but in the ending 2014 is given immediately after 2005. During 1990 the nuclear weapons stockpiles with both the countries are high. United States of America has 10,904 whereas Union of Soviet Socialist Republic has 37,000. This is about four times more than the weapons of USA. The wonder is that 1995 onwards the number of stockpiles is reducing. It has many reasons. It is the experience of 1945 nuclear bomb blast of Hiroshima and Nagasaki of Japan. Millions of civilians also died in that blast. Second World War brought various experiences to the world. Nuclear Non-Proliferation Treaties are also the reasons. UNO also brought awareness among the nations. Human Rights Commissions also tried well. During 2014 the USSR brought the weapons down to 7500 only. This is really drastic reduce. In 1990 the USSR has four times more weapons to the USA whereas during 2014 it is only about 300 more weapons. All the countries should think that if nuclear weapons are used in the wars, there will be much destruction to the mankind. Superpowers and developing countries also concentrate on reducing the nuclear weapons. Recently North Korea tested these weapons and created much tension among the counties. So everyone should respect peace.

Question 9.
Is Veto power to a few countries in the UNO, helping or barrier for World Peace? Discuss.
Answer:
Some times Veto power is working as a barrier and also helpful to world peace.
How it is a barrier:

1. Often the great powers themselves involved in many of the conflicts used their Veto power to block any action by the U.N.O.
2. Sometimes they have also used their power to force the UN to bend to their dictates.

How it is helping :
The special powers also have given the great powers a special role and responsibility in preserving world peace.
U.N.O created pressure on Russia and the USA to the reducing of nuclear weapons.
U.N.O helped to defuse Cuban missile crisis.

However, the very existence of a forum like UN, has forced great powers to exercise moderation and self-control.

Question 10.
Observe the given graph and analyse it.
Answer:

1. The graph explains about India and Pakistan military expenditures.
2. Pakistan had spent more on military expenditure as % GDP.
3. The military expenditure of India was also high.
4. India had spent less on military expenditure as % GDP.

Both countries gave importance to gather more & more weapons because always Pakistan is provoking India on the issue of Jammu & Kashmir.
In 2016 Uri incident also happened. India faces a problem with China also.
(OR)
Since 1988 Pakistan military expenditure has not been high. Since 2000 onwards it has been increasing. Though the amount is increased its expenditure in GDP percentage is decreasing. It seems to be less but in total it is more and dangerous to its neighbouring countries like India. At the same time India is also increasing its expenditure on military to protect its people from neighbouring countries.

Question 11.
Observe the following table and analyse it.
US and USSR Nuclear Stockpiles (Number of warheads)

Year	US	USSR
1965	33,000	10,000
1975	25,000	32,000
1985	24,000	45,000
1995	12,000	25,000
2005	11,000	16,000

Answer:
Table Analysis:

1. From the given table we understand that from the year 1965 to 2005 the U.S stock-piles gradually decreased.
2. In the U.S.S.R the stockpiles increased from 1965 to 1985, and then decreased till 2005.

Reason for increasing the stockpiles: At the beginning the stockpiles number is increased due to military supremacy and to gain economic supremacy that leads the countries to emerge camps after Second World War.

Reasons for decreasing their stockpiles:

1. Both the countries realised that warmongering and the consequent arms race only made the world more unsafe and increased the possibility of a disastrous war for all countries.
2. As a result of the pressures the USA and the USSR, the main competitors in the arms race, signed on cut down their nuclear orsenal.
3. Cold war came to an end with the collapses of the USSR in 1991; is also another reason for this.

Question 12.
Under the present circumstances, give suggestions to build cordial relations between India and its neighbouring countries.
(OR)
Why should India have cordial relations with neighbouring countries?
Answer:

1. India was a founder of the NAM which sought to keep an independent position between the two superpowers.
2. India tried to base its foreign policy on the Gandhian principles of peace and non-violence.
3. India is emerging as a major world economic and political power. So, it should get support from the neighbours and in turn help them.
4. It should take measures to maintain peace and tranquillity at the borders, which is possible only with cordial relations with neighbours.
5. It has shared culture and civilisation with neighbouring countries, thus built bridges of friendship through trade, sports, films, tourism and cultural exchanges.
6. It shall have a greater understanding and cooperation among the people of neighbouring nations.
7. It shall have friendly relations with neighbouring countries and blossom secularism, democracy and freedom here.
8. It shall have cooperation with neighbours on disaster management.

Question 13.
Describe the present circumstances that one threatening world peace.
Answer:
Present circumstances that are threatening world peace:

• Terrorism
• Wars
• Armament race
• Invasions
• Communalism
• Exploitation of resources
• Interference of developed countries in the affairs of developing countries
• Aggressive nationalism

Question 14.
Read the given paragraph and write your opinion.

During the last few decades, Tribal and Marginal farmers have also been threatened by Commercial farmers, mining corporations, dam projects, etc. As the large companies find rare resources in remote rural areas, like minerals, rare plants or animals and water, there has been a rapid increase in the ousting of the farming and tribal population from their traditional areas.

Answer:
According to the given paragraph the marginalised communities are being neglected and mostly they are exploited. Big companies invest money for their benefits and so the tribal people are far away from agriculture forcefully.

Mining corporations take permission from the mineral development Department or the government and they start mining. Sometimes government plan to construct dams so as to get the water irrigated to feed lakhs of hectares of cultivable land and in some cases uncultivable land also will be converted to cultivable. The people in foot hills of the hills mountains or forests will be asked to migrate to other places. Sometimes it is a must. Then they oppose the construction of dams and other developmental activities.

Government has to give sufficient compensation to the land losers. Moreover it is better to provide land in place of land, but it should be of same quality cultivable. When farmers, tribals are asked to vacate where do they go. Without proper planning it impossible to move. In some localities like Yellampally and Mid Manair areas the land losers got sufficient compensation and so they settled in new colonies. In Kudamkulam in Tamilnadu, Narmada dam construction the land losers are not satisfied.

Question 15.
Read the text and answer the following question.

Two major ideological and political camps emerged in the post war period -the Communist block led by the USSR and the Democratic-Capitalist Block led by the USA. On the one hand, the USSR promoted the ideas of equality and state-controlled development and suppression of opposition to these principles. On the other hand, the USA promoted the ideas of multiparty democracy and private capitalist controlled process of development.

Distinguish between the communist block and capitalist block.
Answer:

Communist and Socialistic block	Capitalistic and Democratic block
1. The communist block was lead by the USSR.	1. The capitalistic block was lead by the USA.
2. Here the process of development is controlled by the state.	2. Here, the private capitalists controlled the process of development.
3. Socialism and idea of equality exist here.	3. Democracy exists here.
4. Opposition was suppressed.	4. The USA promoted the idea of multiparty democracy.

Question 16.
Read the passage and answer the following question.

Lai Bahadur Shastri in a rally in Delhi after the end of the war, decried the attempt of Pakistan to use religious symbolism in the war claiming it to be a war of Muslims against Hindus. He proudly stated that India was a secular country.

“The unique thing about our country is that we have Hindus, Muslims, Christians, Sikhs, Parsis and people of all other religions. We have temples and mosques, gurudwaras and churches. But we do not bring this all into politics… This is the difference between India and Pakistan. Whereas Pakistan proclaims herself to be an Islamic State and uses religion as a political factor, we Indians have freedom to follow whatever religion we may choose [and] worship in any way we please. So far as politics is concerned, each of us is as much as Indian as the other.”

Interpret the speech of Lai Bahadur Sastry.
Answer:

1. The above famous speech was delivered by Lai Bahadur Sastry after the Indo-Pak war.
2. He assured the world and the Muslims that it is a secular country.
3. So many religions are there in India.
4. We respect all worshipping places on equal grounds.
5. In India these religions have no role to play in politics as ours is a secular state.
6. People can choose any religion but all of us are Indians.
7. This speech was delivered when Pakistan gave religious symbolism in the war.

Question 17.
Read the information and answer the following questions.
a) What does the above graph indicate?
Answer:
The above graph indicates the nuclear stock piles of the US and the USSR.

b) Which country has highest armament stock during 1985?
Answer:
USSR (Russia)

c) The nuclear stockpiles of which country did not change between 1995-2005?
Answer:
America (USA)

d) After which year the nuclear stockpiles of Russia exceeded America?
Answer:
After 1975, the nuclear stockpiles of Russia exceeded America.

e) How much were the stockpiles of Russia and America during 1965?
Answer:
The stockpiles of Russia and America during 1965 were 5000 and 30000 respectively.

f) How much stockpiles did both the countries possess during 1975?
Answer:
Both the countries have the same nuclear stockpiles, i.e. 25000.

g) Which country is storing atomic weapons in large?
Answer:
The USSR is storing atomic weapons in large.

h) What may be the reason for decrease of atomic weapons storage?
Answer:
Protest movements against the atomic weapons may be the reason in a decrease of atomic weapon storage.

i) How much the stock of weapons of Russia is more than America?
Answer:
Russia has about 15000 warheads more than America.

Question 18.
Read the information and answer the following questions.
a) Which country is spending more money on military?
Answer:
India.

b) Which countries military expenses in terms of GDP are more?
Answer:
Pakistan’s Military expenses in terms of GDP are more.

c) In which year the military expenditure as of GDP was more?
Answer:
Between 2008-09, the military expenditure of GDP equal.

d) What conclusion can you draw from the above graph?
Answer:

1. The military expenditure as a percentage of GDP has been decreasing.
2. The military expenditure of both countries has been increasing.

Question 19.
Read the passage and state your opinion on it.

“Pakistan has over the years encouraged separatist movement in the border states of India like Punjab and Jammu and Kashmir. It is actively training and sending religious extremists to foment trouble in India.

Answer:

1. India and Pakistan became independent by bifurcating from erstwhile British India.
2. The first war between countries took place in 1948.
3. Again in 1965 Pakistan invaded India.
4. Tashkent agreement was signed between two countries in 1966.
5. War broke out in 1971 again over the issue of liberation of Bangladesh.
6. Since then, the Pakistan over years encouraging separatist movement in the border states of India.
7. Both the countries are spending much amounts of scarce funds on arming themselves against each other.
8. Both the countries should go for a solution and reduce tension along the border.

Question 20.
On the outline map of world identify the following locations.

1. Egypt
2. Indonesia
3. Israel
4. Palestine
5. China
6. Spain
7. Belgium
8. Congo
9. Chile
10. Jordan
11. Afghanistan

Answer:

Question 21.
Locate the following in the given map of World.

1. Congo
2. Germany
3. Fascism belongs to this country.
   Answer: Italy
4. Head quarters of League of Nations.
   Answer: Geneva
5. Czechoslovakia
6. Romania
7. Mediterranean sea
8. Burma / Myanmar
9. Australia
10. Bulgaria

Answer:

These AP 10th Class Social Studies Important Questions 5th Lesson Indian Rivers and Water Resources will help students prepare well for the exams.

AP State Syllabus 10th Class Social 5th Lesson Important Questions and Answers Indian Rivers and Water Resources

10th Class Social 5th Lesson Indian Rivers and Water Resources 1 Mark Important Questions and Answers

Question 1.
1. What are the twin sources of ‘Ganga’?
Answer:
The twin sources of Ganga are:

1. Bhagirathi,
2. Alakananda

Question 2.
Why are the Himalayan rivers called perennial?
Answer:
Himalayan rivers are called perennial because they flow throughout the year.

Question 3.
Suggest two activities that can be taken up so that the groundwater can be restored.
Answer:
The following activities are suggested to restore the ground water.

1. Check dams,
2. Percolation tanks,
3. Loose boulder structures,
4. Plantations on forest lands and roadsides etc. (Any two you can write).

Question 4.
What are the tributaries of the Indus river?
Answer:
The tributaries of the Indus river are the Jhelum, the Chenab, the Ravi, the Beas, and the Sutlej.

Question 5.
Name any two tributaries of river Indus.
Answer:
Jhelum, Chenab, Ravi, Beas, Sutlej.

Question 6.
What are the two branches of south-west monsoons which bring rains to India?
Answer:
The two branches of south-west monsoons which bring rains to India are

1. The Arabian sea branch
2. The Bay of Bengal branch

Observe the map given and answer questions 7 and 8.

Question 7.
Name the two rivers that flow into the Arabian sea.
Answer:
The rivers that flow into the Arabian sea are

1. Sabarmati
2. Mahi
3. Narmada
4. Tapati

Question 8.
Through which states, river Tungabhadra flows?
Answer:
River Tungabhadra flows through Karnataka, Telangana, and Andhra Pradesh

Question 9.
Observe the map and answer the questions below?

a) Which river is shown in the map?
b) Which state does the river form a delta?
Answer:
a) River Godavari
b) Andhra Pradesh.

Question 10.
What are the three physiographic units of the drainage of India?
Answer:

1. The Himalayas
2. The Peninsular Plateau and
3. The Indo-Gangetic plain

Question 11.
Divide the Indian drainage system on the basis of its origin.
Answer:

1. The Himalayan rivers.
2. The Peninsular rivers.

Question 12.
Name the three Himalayan rivers. (OR)
Mention the three principal river system to which the Himalayan Rivers belong.
Answer:

1. The Indus
2. The Ganges
3. The Brahmaputra

Question 13.
Which rivers are perennial? Write the reason.
Answer:
The Himalayan rivers are perennial. This is because the rivers are supplied on rainfall as well as the melting snow.

Question 14.
Where does the Indus originate? What is its route?
Answer:
The Indus originates in the northern slopes of the Kailash range in Tibet near lake Manasarovar. It follows a north-westerly course through Tibet.

Question 15.
Where does the Indus enter India?
Answer:
It enters Indian territory in Jammu and Kashmir.

Question 16.
What do the water resources require?
Answer:
The water resources require both collective action at the local level and appropriate laws and policies at the state and national level.

Question 17.
What is the significance of ‘Devaprayag’?
Answer:
Bhagirathi and Alakananda join at ‘Devaprayag’ to form the Ganga.

Question 18.
Where does the Brahmaputra rise?
Answer:
The Brahmaputra in Tibet rises from the snout of the Chemayungdung glacier of the Kailash range near Manasarovar.

Question 19.
Where does the Brahmaputra enter India?
Answer:
The Brahmaputra enters in a great loop southwest through Arunachal Pradesh in India, first as Siang and then as Dihang.

Question 20.
What are the two tributaries of the Brahmaputra?
Answer:
The Dibang and the Lohit are the two tributaries of the Brahmaputra.

Question 21.
Where do the peninsular rivers originate?
Answer:
The peninsular rivers the Krishna, the Godavari and the Cauveri originate in the Western Ghats. The Mahanadi originates in the Vindhya Satpura ranges.

Question 22.
Which is the largest peninsular river system?
Answer:
The Godavari is the largest peninsular river system.

Question 23.
What is the source of the river Godavari?
Answer:
The source of the Godavari is in the Triambak plateau near Nasik in Maharashtra and discharges its water into the Bay of Bengal.”

Question 24.
Write the ‘inflow’ as a formula?
Answer:
Inflow = Precipitation + Surface flow + Groundwater flow.

Question 25.
What is called evaporation?
Answer:
The turning of water into vapour is called evaporation.

Question 26.
What is called transpiration?
Answer:
Living things give off water into the atmosphere through their breathing process, this is called transpiration.

Question 27.
What is called evapotranspiration?
Answer:
The total amount of water added to the atmosphere from both evaporation and transpiration is called evapotranspiration.

Question 28.
When would the surface flow increase?
Answer:
The surface flow would increase during the monsoon months.

Question 29.
How does the water reach the root zone of crops?
Answer:
Water reaches the root zone of crops either through rainfall or some process of irrigation.

Question 30.
Which kind of water is the vital need?
Answer:
Water used for drinking, cooking, washing, cleaning and for animals is vital need.

Question 31.
Name the surface storages.
Answer:
Tanks, ponds, lakes, etc. are the surface storages.

Question 32.
What is the question that we face today about the groundwater?
Answer:
The question that we face today is the depletion of groundwater storage and tendency not to care about the availability for future generations.

Question 33.
What are the two parts of the Tungabhadra basin?
Answer:

1. The upper and middle catchment in Karnataka and
2. The lower portion of the catchment in Andhra Pradesh.

Question 34.
Which water is available to us?
Answer:
The annual flows and stocks that recharge wells and tubewells is the water that is available for us.

Question 35.
When can the mining water be done?
Answer:
The mining water can be done only in extreme drought situations and replenished in good rainfall years.

Question 36.
How are the low portions of the Tungabhadra basin characterized in Andhra Pradesh?
Answer:
They are characterized by low rainfall and drought.

Question 37.
What is the result of the encroachment of public land for cultivation?
Answer:
It results in more land being brought under cultivation at the expense of tree cover.

Question 38.
What is the result of the rampant felling of trees and mining activity?
Answer:
Rampant felling of trees and mining activity is resulting in forest degradation, along with the destruction of the habitat of highly threatened flora and fauna.

Question 39.
Why did the Tungabhadra basin lose its water storage capacity?
Answer:
With the accumulation of silt due to mining, dust, soil erosion, debris the Tungabhadra Dam lost its water storage capacity.

Question 40.
How is water shared?
Answer:
Water is shared based on agreements between state governments.

Question 41.
What is the result of industrialization and urbanization?
Answer:
While increased industrialization and urbanization have improved standards of living for some, the same activities have caused pollution, especially by industrial units.

Question 42.
Why do the interstate disputes arise between Andhra Pradesh and Karnataka?
Answer:
Interstate disputes between Andhra Pradesh and Karnataka arise due to the trans-boundary nature of the river.

Question 43.
Where is Hiware Bazar located?
Answer:
Hiware Bazar is located in the Ahmednagar district in Maharashtra. It is situated on the eastern side of the Sahyadri mountain ranges that run north-south and separate Konkan, the coastal region, from the rest of Maharashtra.

Question 44.
Expand CCT.
Answer:
Continuous Contour Trenches.

Question 45.
Why were CCTs dug?
Answer:
The CCTs were dug on the hill slopes to arrest the erosion of soil, harvest water and encourage growth of grass.

Question 46.
Name some water harvesting structures.
Answer:
Check dams, percolation tanks and loose boulder structures.

Question 47.
Name the four bandis.
Answer:

1. Kurhad bandi
2. Charai bandi
3. Nasbandi
4. Nashabandi

Question 48.
What are the other bans which were added later?
Answer:

1. The ban on borewells for irrigation,
2. Growing sugarcane and banana and
3. Selling one’s own land to any outsider.

Question 49.
Why do the farmers in Hiware Bazar keep rainfall data meticulously?
Answer:
They keep rainfall data meticulously and use it for crop planning and water use prioritization.

Question 50.
What happens when there is so much extraction of water?
Answer:
When there is so much extraction, it affects others in connected areas. It affects the stock of water that would be available for future generations.

Question 51.
What laws and regulations are needed for water consumption?
Answer:
Drinking water is the first priority as well as a human right and that, Panchayati Raj institutions must have control over the use of groundwater.

Question 52.
Which judgments illustrate the confusion over our laws today?
Answer:
The judgments in the case of Perumatty Gram Panchayat in Kerala and Coca Cola company illustrate the confusion over our laws today.

Question 53.
What do water resources require?
Answer:
The water resources require both collective action at the local level and appropriate laws and policies at the state and national level.

10th Class Social 5th Lesson Indian Rivers and Water Resources 2 Marks Important Questions and Answers

Question 1.
The Himalayan rivers are perennial, which means these rivers are filled with water throughout the year.
What are the two reasons that they are called perennial rivers?
Answer:

1. The Himalayan rivers are perennial rivers as a result of the melting of ice and glaciers.
2. During rainy season they depend on rainfall.

So they are filled with water throughout the year.

Question 2.
Observe the map and answer the following questions.
a) What is the River Ganga called in Bangladesh?
Answer:
River Padma.
b) On the banks of which River is Kolkata situated?
Answer:
River Hooghly. (Hugly)

Question 3.
Create two slogans on water conservation or the importance of water. (OR)
Write two slogans to bring awareness on saving of water in consumption.
Answer:
a) Save water – Save future.
b) Without water – there’s no future.
(Students can create a few of their own)

Question 4.
What were the conditions set by the Maharashtra government for the selection of villages under Adarsh Gram Yojana?
Answer:
The conditions set by the Maharashtra government for the selection of villages under the Adarsh Gram Yojana are

1. Kurhad bandi – ban of felling trees
2. Charai bandi – ban of free grazing
3. Nasbandi – family planning
4. Nashabandi – ban on liquor
5. Shramadan – voluntary physical labour.

Question 5.
Categories the drainage system based on its origin.
Answer:
On the basis of the origin, the drainage system in India is categorized into

Question 6.
Suggest measures to be taken to conserve water.
Answer:
Measures to conserve water:

1. Check dams
2. Percolation tanks
3. Loose boulder structures
4. Plantation

Question 7.
Give a few suggestions for the betterment of groundwater level in Telangana in the present situation.
Answer:

1. All people should maintain rainwater harvesting pits.
2. They should construct and maintain check dams. The government should take responsibility.
3. Continuous contour trenches are to be built up.
4. Silt is to be removed every year from the tanks.
5. Plantation should be taken up seriously.
6. Digging of deep borewells should be avoided.

Question 8.
Even in years of continuous drought, there was no drinking water shortage in Hiware Bazar.
What are the reasons for this?
Answer:

1. The main thing is the social control over groundwater extraction and no bore-wells usage for irrigation, no water-intensive crops like sugarcane.
2. Water for irrigation was taken only through dug wells.
3. They also worked out certain thumb rule type of things like if they get good rainfall, then they can take full rabi crop; if the rainfall is less, then they bring down the area under rabi crop etc.
4. They keep rainfall data meticulously and use it for crop planning and water use prioritization.

Question 9.
As a student, how do you save water in your house and in your school?
Answer:

1. Make it a classroom activity to check for leaks regularly.
2. Install rainwater tanks.
3. Fix any leaking taps, toilets.
4. Raise awareness of the importance of water.

Question 10.
Create a poster on water importance.
Answer:

WATER IS LIFE

Water has been important for people for thousands of years. Without water there would be no life on earth.
We use water in our houses for cooking, bathing and washing the dishes. Water is used to grow food. In many dry areas farmers must bring water to the fields through canals and expensive irrigation systems.

Industries and factories also use water. Fruits and vegetables must be cleaned before they can be processed and sold in supermarkets. Water is used for cooling in many areas, for example in steel production.

Many countries around the world use water to produce energy. Power stations burn coal which turns water into steam. Countries with many mountains and rivers use the power of water to produce electricity.

Water is important for our free time. People enjoy themselves at seaside resorts or on cruise trips.

Transportation was at first carried out on waterways. Ancient civilizations traded goods across the Mediterranean Sea. Today oil, coal, wheat and other products are transported on waterways.

Question 11.
Write about the drainage of India.
Answer:
The drainage of India has evolved and adjusted itself with the evolution of the three physiographic units:

1. the Himalayas
2. the Peninsular plateau and
3. the Indo- Gangetic plain. On the basis of its origin, the drainage system in India can be broadly divided into two categories,
   i) The Himalayan rivers and ii) The Peninsular rivers.

Question 12.
“Rivers of India play an important role in the lives of the Indian people” – Comment on it.
Answer:

1. The river system provides irrigation, potable water, cheap transportation, electricity and livelihoods for a large number of people all over the country and to rural areas.
2. This easily explains why nearly all the major cities of India are located by the banks of rivers.
3. Several major rivers along with their tributaries make up the river system of India.
4. So rivers of India play an important role in the lives of the Indian people.

10th Class Social 5th Lesson Indian Rivers and Water Resources 4 Marks Important Questions and Answers

Question 1.
In which place has the water level gone down in your area? What are the reasons for the reduction of water levels according to your opinion?
Answer:
The water level has gone down in many of our areas. The groundwater is useful for both domestic purpose and for agriculture. If groundwater is not available, there will be many problems.
My opinion is that because of modernization of agriculture motor pumps of high horsepower are being used. Very deep borewells cause for drawing out water from the ground. Water has become a source of business. Many multinational companies draw water and sell in the form of bottles. Water conservation is also a major issue and it is taken as a serious one.

Question 2.
Explain any four river systems of India in the prescribed table form.

Sl No.	Nameof the River	Origin or Birth place	Direction of Flow	Tributaries	Flow through which States

Answer:

Question 3.
Today underground water is the main source of water for people. When there is so much extraction it affects others in connected areas. It affects the stock of water that would be available for future generations. Therefore one can’t allow individual land owners to extract as much water as they wish from the land. There should be some restrictions.
Do you agree, with this? Write your opinion.
Answer:
Yes. I agree with this statement.

1. Water should be treated as a common pool resource.
2. There are no boundaries in the flowing water underground.
3. Land ownership should not be applied to underground water.
4. Drinking water should be the first priority as well as a human right.
5. Panchayat Raj Institutions must have control over the use of groundwater.

Question 4.
“The current laws about groundwater in many states are both outdated and inappropriate. They were developed at a time when groundwater was a marginal source of water. Today shallow and deep tubewells have the potential to draw a lot of water.”
Write your comment on the judicious way of using and equal distribution of groundwater and suggest few measures in this regard.
Answer:

1. Today underground water is the major source of water for people.
2. When there is so much extraction, it affects the stock of water that would be available to future generations.
3. Therefore the landowners cannot be allowed to extract as much as they wish from their land. There should be some restrictions.
4. These restrictions will be acceptable if we first delink the connection between ownership of land and water drawn through tube wells on the land.

Question 5.
“Usage of water without keeping in view about the future leads to non-availability of underground water for future generations.” Comment.
Answer:

1. Today groundwater is the major source of water for people.
2. When there is so much extraction, it affects others in connected areas.
3. It affects the stock of water that would be available for future generations.
4. So individual land owners should not be allowed to extract as much water as they wish.
5. There should be some restrictions.
6. The relation between the land ownership and the extraction of water should be delinked.
7. They only the restrictions will be implemented properly.
8. Groundwater should be treated as a common pool resource.

Question 6.
Read the following paragraph and write your opinion on it.
What is required are laws and rules to recognize that water is common flowing resource? Drinking water is the first priority as well as a human right and that Panchayat Raj institutions must have control over the use of groundwater.
Answer:
In my opinion.

1. Groundwater benefits a wide range of people and the environment.
2. But there are number of threats to the sustainability of this natural resource, which are compounded by a lack of understanding it.
3. Groundwater is often seen as a resource that can be drawn on when surface water is scarce.
4. Due to over use of groundwater the quality of water is deteriorating.
5. If the people drink that polluted water, they will get diseases.
6. Drinking water is the first priority as well as a human right.
7. So, the Panchayat Raj institution think about water is common flowing resource at the same time these institutions have control on groundwater for the sake of future generations and provide it equitable manner.
   Example: In Kerala, Perumatti grama panchayat, the Panchayat Raj institution give first priority to drinking water and next will give importance to Cocacola company. Here, the people’s health is most important.

Question 7.
Read the following paragraph and write your opinion on it.
Today, this is the major source of water for people. When there is so much extraction, it affects others in connected areas. It affects the stock of water that would be available for future generations. Therefore, one can’t allow individual landowners to extract as much water as they wish from their land. There should be some restrictions. These restrictions will be acceptable if we first delink the connection between ownership of land and water drawn from the underground system through tube-wells on the land.
Answer:

1. Today groundwater is the main source for people.
2. But excessive extraction of the groundwater is more effect to not only present people but also future generations.
3. But there are no appropriate laws to regulate the usage of the groundwater resources.
4. All the present laws were designed when the usage was minimum.
5. The owner of the land is not the owner of the groundwater beneath his land.
6. A link should be designed between the land ownership and control.
7. The government should control the individuals in using underground water resources.

Question 8.
Explain the use of water in the river basin of Tungabhadra.
Answer:

1. River water of Tungabhadra is shared by Karnataka, Telangana and the Andhra Pradesh States.
2. Approximately 80% of rural area people are dependent on agriculture with Tungabhadra water.
3. In some areas people constructed storage tanks based on Tunghabhadra water.
4. Surface flows by canals that carry water from dams built along Tungabhadra in other areas.
5. More land is brought under cultivation at the expense of tree cover.
6. There are 27 large industries and 2543 small industries are depend on Tungabhadra water.
7. It provides supply of drinking water to neighbour areas.
8. Improved standard of living for some.
9. Disputes also arised between Karnataka and Andhra on the base of availability of water.

Question 9.
Explain the Himalayan river systems.
Answer:

Himalayan River Systems

The Indus system, The Ganga system and the Brahmaputra system come under the Himalayan river systems:

1. The Indus System: The Indus originates in Kailash range near Manasarovar. It enters Indian territory in Jammu and Kashmir. The Ravi, the Jhelum, the Chenab, the Beas and the Sutlej are its tributaries.
2. The Ganga System: The Ganga is formed joining Bhagirathi with Alakananda which join at Devaprayag. It has large number of tributaries.
3. The Brahmaputra System: The Brahmaputra rises from Kailash range near Manasarovar. It covers Tibet, and joins Arunachal Pradesh in India. It has different names in different places and is known as the Brahmaputra. The Dibang and the Lohit are its tributaries.

Question 10.
Read the given paragraph and write your opinion.
Regulation is not easy. This is also because for some resources like water, electricity, oil, natural gas, etc. consumption by one person or a sector affects what is available for others. In fact, in a number of states, the answer to falling water tables has not been to address the issue itself. State governments have thus often chosen to increase power subsidies to make extraction of ever deeper layers of groundwater possible.
Answer:
The given paragraph says that the regulation of natural resources like water, natural gas, etc. is not easy. Gradually water table is decreasing. Governments increase power subsidies to make extraction of ever deeper layers of ground water possible.

My interpretation is that water, electricity, oil and natural gas are essential for all people. These are to be used in control. Whatever we use should be useful to the next coming genera¬tion. Natural resources are sustainable. They can be useful to all generations. Water is an essen¬tial commodity. It is the people who decide the future. For a few decades we have been observ¬ing that more groundwater is being pumped out. Sinking water is gradually decreasing. In forests also water is not available. So monkeys, leopards are coming to villages. Deforestation is increased. Quarrying is also increased. Clouds are coming but they are not giving rain. Temperature is increasing day by day. People should understand the need of the future and act accordingly. Per head consumption is increasing drastically. Water conservation is an essential one. Not only human beings, birds, animals, plants also depend on water. Water harvesting pits are promoted at every house. Water shed programs are to be taken up. Every drop of water should be caught perfectly and saved with proper proposals. Government concentrates on the conservation of water to make the next coming generation happy.

Question 11.
“India is heading towards water scarcity.” Trace the possible solutions to tackle this problem.
Answer:

1. Construction of multi purpose projects and canals.
2. Solving river water disputes quickly.
3. Inter-basin transfer of water.
4. Measures to raise the underground water table.
5. Rainwater harvesting.
6. Watershed development.
7. Avoiding pollution of water bodies.
8. Preventing the wastage of water.
9. Interlinking of Rivers.

Question 12.
Read the following paragraph and state your opinion on it.
Encroachment of public lands for cultivation is common. It results in more land being brought under cultivation at the expense of tree cover. Rampant felling of trees and mining activity is resulting in forest degradation, along with the destruction of the habitat of highly threatened flora and fauna. Inflows of groundwater depend on the tree cover in the catchment areas. Inadequate tree hover leads to water run-off as surface flow without getting a chance to recharge the underground system. Moreover, this also causes flash floods. If we wish to be fair to both the rainfed and canal irrigated regions, we must adopt a different plan for water conservation and a system of sharing water.
Answer:

1. In recent years public land is brought under cultivation at the expense of tree cover.
2. The felling of trees and other mining activities threatened flora and fauna.
3. The inadequate free cover leads to water run off.
4. There is less chance for recharging groundwater.
5. It causes flash floods.
6. The felling of trees threatened flora and fauna.
7. Hence we must be alert and adopt a different plan for water conservation.

Question 13.
Read the para and answer the following questions.
Let us see the dispute over water use between the Perumatty Grama Panchayat in Kerala and the Coca Cola Company. The Panchayat decided not to renew the license for extraction of water because of the lowering of the water table in neighbouring areas. There was also decreasing water quality to the extent that the local government primary health centre had concluded that the water was not fit for drinking. The issue was brought to the courts and is now pending in the Supreme Court as on January 2014. The two decisions given by the judges in Kerala gave two opposing views of groundwater regulation. The first judge found that groundwater is a public resource meant for all, and that the state has a duty to protect it against excessive exploitation. Additionally the judge made the link that drinking water is a priority. The second judge took a completely different perspective and asserted the primacy of landowners’ control over groundwater. These two contradictory decisions illustrate the confusion over our laws today.
Answer:

1. The para is an example of the confusion over our laws today.
2. The Coca Cola company was extracting more and more underground water.
3. This was reducing the groundwater levels and the water is getting polluted.
4. The issue was brought to the court.
5. Two judges gave contradicting judgments.
6. The first judge stated that the state has a duty to protect it against excessive
7. The second judge insisted the primacy of landowners’ control over groundwater.
8. Hence we can conclude that there should be some clarity regarding the laws relating to ground-water.
9. The laws are outdated and inappropriate.
10. There should not be any contradiction regarding public interest.

Question 14.
Read the following paragraph and write your comments.
During the fast two decades there has been an increasing trend in the number of small towns and industrial areas. This has made the competing demands for water more complex. While increased industrialization and growth of urban areas have improved standards of living for some, the same activities have caused pollution especially by industrial units.
Answer:

1. According to the given paragraph, it is clear that urbanization leads to water problems.
2. Another point is that some people are leading prosperous life whereas many poor people are facing the problems of pollution.
3. In my opinion, in this modern age urbanization has become mandatory.
4. People from villages are coming to cities and towns for different reasons.
5. Education for children, medical facilities and different livelihoods are the needs of the rural people.
6. As they come to cities and towns they face the problems of basic need like food, water, shelter and cloth.
7. In conclusion I don’t say that urbanization is not necessary but the problems of the poor migrants also should be considered.
8. At industries and working cites water facility is to be provided.
9. In all the areas protected water supply is necessary.

Question 15.
Read the following paragraph and write your comment on it.
Over the past few decades groundwater has become the main source, especially for domes¬tic use and agriculture. This tremendous increase in the use of groundwater has significant impact on water availability and access to it.
Answer:

1. According to this paragraph the groundwater level is the crucial one to all the people.
2. The groundwater is useful for both domestic purpose and for agriculture.
3. If groundwater is not available there will be many problems.
4. My opinion is that because of the modernization of agriculture motor pumps of high horsepower are being used.
5. Very deep bore wells cause for drawing out water from the ground.
6. Water has become a source of business many Multinational companies draw water and sell in the form of bottles.
7. Every individual should think about the importance of water as it is useful to all people.

Question 16.
Read the following paragraph and comment on it.
Current laws on groundwater use are inappropriate because the basic links between access to groundwater and land ownership on which these rules are based are flawed. Since groundwater has to be extracted from the land above, a link was established between land ownership and control.
Answer:

1. The given paragraph says that the current laws are not appropriate and there is no link between accesses to groundwater and land ownership.
2. Proper laws are to be made and implemented otherwise there will be a mass problem of water.
3. I would like to comment on this paragraph that current laws are not being implemented in a right way.
4. The government should have true spirit of implementation of laws. There are so many laws made in the time of the British rule.
5. After independence these would have been modified or changed according to the present needs or new laws according to the situations and necessities have to be made time to time. This was not done.
6. The government should take necessary action to bring in new laws and they should be implemented in a right way.

Question 17.
People are facing the problem of water scarcity in all the areas. It may be there in your locality also. Write a note on the condition of water scarcity that you recently observed.
Answer:

1. Scarcity of water has become a common problem everywhere.
2. People of all corners are facing the same problem.
3. They purchase even two glasses of water by paying twenty or twenty five rupees.
4. Human activities like deforestation, using plastic, cement and concrete roads are a few rea¬sons for the depletion of groundwater level.
5. Deforestation leads to low rainfall.
6. Rainwater is not percolated properly because of two reasons.
7. By constructing small check dams, it is better to store the water and so it could be useful to restore the groundwater.
8. Then it will be expected that drinking water is available.

Question 18.
Observe the map and answer the following questions.
a) Mention any two tributaries of river Ganga.
Answer:
Gandak, Ghagra, Gomati, Son, Betwa, Chambal, Yamuna are the tributaries of river Ganga. (Any two can be written)
b) River Brahmaputra joins a river before joining into Bay of Bengal. What is the name of the river?
Answer:
The river in which the Brahmaputra joins is the Ganga.
c) Two countries are sharing the water of the river Teesta. What are the two countries?
Answer:
India and Bangladesh.
d) Which river is called ‘Padma’ in Bangladesh?
Answer:
River Ganga.

Question 19.
Locate the following in the given map of India.

1. Brahmaputra river
2. Drainage area of Indus river
3. Nagarjuna Sagar Dam
4. The project on Sutlej river
   Answer: Bhakra Nangal
5. The river which is parallel to river Narmada.
   Answer: Tapti
6. The lake which in between Krishna and Godavari rivers.
   Answer: Kolleru
7. Locate Hiware Bazar.
8. Konkan Coast.
9. The Coast of Tamilnadu
   Answer: Coromandel
10. Capital of Madhya Pradesh.
    Answer: Bhopal

These AP 10th Class Biology Important Questions and Answers 10th Lesson Natural Resources will help students prepare well for the exams.

AP State Syllabus 10th Class Biology 10th Lesson Important Questions and Answers Natural Resources

10th Class Biology 10th Lesson Natural Resources 1 Mark Important Questions and Answers

Question 1.
Recently a new programme was launched in our state known as “Vanam – Manain”. Prepare any two slogans to promote the programme.
Answer:
a) Save forest, forest will save you.
b) Grow the plants and get the fresh air.

Question 2.
Suggest any two practices suitable to farmers with less water resources.
Answer:

1. Construction of percolation tanks (or) Soak pits
2. Irrigation techniques like drip irrigation and usage of sprinklers.

Question 3.
Why should we conserve forests? Give two reasons.
Answer:
a) Forests serve as lungs for the world. They purify the air and protect the earth from greenhouse effect and global warming,
b) Forests are rich habitats for plants

Question 4.
Ravi observed symbol on the plastic water bottle purchased by him. What does this symbol indicate? and animals.
Answer:
The symbol on the plastic bottle indicates that the bottle is made from recycled plastic and after its use it can be recycled.

Question 5.
Write any two suggestions for the conservation of biodiversity at your village.
Answer:

1. Protecting and preserving the natural habitats of birds and animals.
2. Replace the wood products with alternative sources.
3. Using Recycled products and following the 4’R Principle in day to day life.

Question 6.
Suggest any two activities to check soil erosion in your school.
Answer:

1. Observe the school ground after the rain.
2. Conduct a field project on soil erosion.

Question 7.
To create awareness on “Water conservation” in your locality, what slogan you will suggest?
Prepare two slogans on ‘Save Water’ propaganda.
Answer:
“Don’t Waste Water”.
“Save every drop”.
“Water is life”.

Question 8.
The symbol is there on the item you bought. What it instructs? (OR)
What does the given logo indicate? What does it mean?

Answer:
It is the Recycle logo. It indicates that the item we bought is prepared from recycled materials or the item can be recycled after use.

Question 9.
What happens if the forest area decreases rapidly?
Answer:
If the forest area decreases

1. It destroys wildlife habitat.
2. It increases soil erosion.
3. It releases green house gases into the atmosphere contributing to global warming.
4. It also harms people who relay on forest for their survival, hunting and gathering, harvesting forest products or using timber and firewood.

Question 10.
Write two activities which you are performing to save electricity.
(OR)
Write any two measures vou take in your home to reduce the consumption of electricity.
Answer:

1. We can reduce the consumption of electricity by putting off the fans and lights when there is no need.
2. We can use LED (Lighting Emitting Device) bulbs to save electricity.
3. To shut down laptops and computers when they are not in use.

Question 11.
Prepare two slogans on protecting non-renewable resources.
Answer:

1. Use Biofuel – Reduce Fossil Fuel.
2. Use alternative resources – Save the environment.

Question 12.
Write two examples for non-renewable resources.
Answer:
Examples for non-renewable resources are coal, petroleum and natural gas.

Question 13.
What is sustainable development? Is it needful for us?
Answer:
When we use the environment In ways that ensure we have resources for the future, It Is called sustainable development. It Is needed because development and conservation can coexist In harmony.

Question 14.
What are examples for natural resources?
Answer:
Examples for natural resources are water, soil, forests, flora, fauna, etc.

Question 15.
What are percolation tanks?
Answer:
Percolation tanks are normally earthen dams with masonry structures where water may overflow.

Question 16.
What are Kharif crops?
Answer:
Crops grown In the rainy season are termed as Kharif crops, e.g: Paddy, maize, millet and cotton crops.

Question 17.
What are Rabi crops?
Answer:
The crops that are grown only in winter season are generally called Rabi crops, e.g.: Wheat, Gram and Mustard.

Question 18.
What is the average fall of ground water level in Andhra Pradesh state during the period of 1998 – 2002?
Answer:
The average fall of ground water level In Andhra Pradesh state during the period of 1998 – 2002 Is 3 meters.

Question 19.
Which agency in villages of Warangal district helped in recharging wells that were being dried up?
Answer:
Centre for water solidarity (Secundrabad, T.S.) helped In recharging wells that were drying up In the villages.

Question 20.
Give examples for micro irrigation techniques.
Answer:
Drip irrigation, sprinklers are the examples for micro irrigation techniques.

Question 21.
Mow did the boundaries between the villages were fixed in ancient times?
Answer:
In ancient times village boundaries were decided upon a water shed (Land between water sources usually of two rivers or streams) basis fixed at the common point of the drainage system In between two villages by the expert farmers In the village.

Question 22.
Expand ICRISAT.
Answer:
International Crop Research Institute for Semi-Arid Tropics.

Question 23.
What is the other name for Sri Rama Sagar Project?
Answer:
Sri Rama Sagar Project also known as the Pochampadu project on the Godavari river,

Question 24.
What is the use qf planting Gliricidia on field bunds?
Answer:
Planting Gliricidia on field bunds help In strengthen them and make the soli nitrogen-rich.

Question 25.
What is the micro irrigation system that can reduce water consumption by 70%?
Answer:
Drip irrigation can reduce water consumption by 70%.

Question 26.
Who predicted that by 2025, 1.8 billion people will be living in countries or regions with absolute water scarcity ?
Answer:
The Food and Agriculture Organisation (FAO) of the united nations has predicted that by 2025, 1.8 billion people will be living in countries or regions with absolute water scarcity.

Question 27.
What happens if we use resources wisely?
Answer:
If resources are used wisely and efficiently they will last much longer. Through conservation people can reduce waste and manage natural resources wisely.

Question 28.
Give an example of country where restrictions on water usage were imposed.
Answer:
In Australia restrictions were imposed on activities like, watering lawns by using sprinkler systems, washing vehicles, using house pipes to clean paved areas, and refilling swimming pools.

Question 29.
Why are the natural resources used up quickly?
Answer:
The population of human beings has grown enormously in the past two centuries. Billions of people use up resources quickly as they eat food, build houses, produce goods and burn fuel for transportation and electricity.

Question 30.
What happens if we damage a forest resource?
Answer:
Harm to animals that may be forced to find new habitats. If we damage a forest resource indiscriminately the depletion of resources occur and we may have to face problem for water and timber in future.

Question 31.
What are the results of deforestation?
Answer:
Deforestation destroys wild life habitats and increases soil erosion and also releases green house gases into atmosphere, contributing to global warming.

Question 32.
How the people in China and Mexico recycle paper? (OR)
Give an example of recycling paper by the people. What is the use of recycling paper?
Answer:
People in China and Mexico reuse much of their waste paper, including writing paper, wrapping paper and card board.

Question 33.
How the soil is important for us ? How the soil is importane for us?
Answer:
Soil is vital to food production and also important to plants that grow in the wild.

Question 34.
What are the reasons for depletion of nutrients in soil?
Answer:
Poor farming methods, such as repeatedly planting the same type of crop in the same place cause depletion of nutrients in the soil.

Question 35.
What is biodiversity?
Answer:
Biodiversity is the variety of living things that populate the Earth.

Question 36.
How are people speeding up the loss of biodiversity?
Answer:
Through hunting, pollution, habitat destruction, people are speeding up the loss of biodiversity.

Question 37.
How many plant species are being used by us for medicines world wide?
Answer:
We use between 50,000 to 70,000 plant species for medicines world wide.

Question 38.
What is selective harvesting?
Answer:
The practice or removing individual plants or small groups of plants leaving other plants standing to anchor the soil is called selective harvesting.

Question 39.
How are fossil fuels produced?
Answer:
The fuels that are produced from the remains of ancient plants and animals are called fossil fuels. They include coal, petroleum and natural gas.

Question 40.
What are the alternate sources of energy?
Answer:
The alternate sources of energy are sun, wind and water.

Question 41.
What are the other products made from petroleum?
Answer:
Plastic, synthetic, rubber, fabrics like nylon, medicines, cosmetics, waxes, cleaning products, medical devices, etc., are the other products made from petroleum.

Question 42.
Which plant’s seeds are used for the production of bio-fuel?
Answer:
Seeds from the Jatropa Curcas plant are used for the production of bio-fuel.

Question 43.
How does the mining method, Mountain Top Removal mining (MTR) devastate the environment?
Answer:
The mining method Mountain Top Removal mining devastate the environment. They destroy soil, plants and animal habitats.

Question 44.
In which country car manufacturers recycle many raw materials used in making automobiles?
Answer:
In Japan car manufacturers recycle many raw materials used in making automobiles.

Question 45.
In which country nearly one third of the iron produced comes from recycled automobiles?
A. In the United States, nearly one-third of the iron produced comes from recycled automobiles.

Question 46.
What does the Indian tradition teach us?
Answer:
The Indian tradition teaches us that all forms of life – human, animal and plant are so closely inter linked that disturbance of one gives rise to imbalance in the other.

Question 47.
Expand IUCN.
Answer:
IUCN stands for International Union for the Conservation of Nature.

Question 48.
How is IUCN planning to protect wild life and habitats?
Answer:
IUCN monitors the status of endangered wild life, threatened national parks and preserves.

Question 49.
What are the four R’s to save the environment?
Answer:
Reduce, Reuse, Recycle, Recover are the four R’s to save the environment.

Question 50.
How did Amritha Devi and her daughters protest against the king’s order?
Answer:

1. Amritha Devi and her daughters, followed by villagers, who clung to trees in the forest surrounding their village and laid down their lives to save them.
2. They protested against the king’s order to collect wood for the construction of his palace.

Question 51.
Write a method of soil conservation.
Answer:
One soil conservating method is called contour strip cropping. Several crops such as corn, wheat and clover are planted to alternating strips across a slope or across the path of the prevailing wind.

Question 52.
What is the rate of extinction by the estimation of the scientists?
Answer:

1. Scientists estimate that the current rate of extinction is 1,000 times the natural rate through hunting, pollution, habitat destruction.
2. Based on various estimates of the number of species on Earth, we could be losing anywhere from 200 to 1,00,000 species each year.

Question 53.
What is the need to protect biodiversity?
Answer:
We need to protect biodiversity to ensure plentiful and varied food sources. Biodiversity is important for more than just food because many plant species are being used for medicines.

Question 54.
Mention two ways in which water harvesting can be undertaken?
Answer:
The two ways by which water harvesting can be undertaken are

1. Capturing run off water from, rooftops.
2. Capturing run off water from local catchments.

Question 55.
On the basis of the issues raised in the chapter management of natural resources, what changes you in corporate in your lifestyle in a move towards a sustainable use of our resources?
Answer:
I would incorporate the maximum of four R’s i.e., reduce, recycle, reuse and recover in my lifestyle in a move towards a sustainable use of our resources.

10th Class Biology 10th Lesson Natural Resources 2 Marks Important Questions and Answers

Question 1.
Rahul remarked that different human activities are responsible for global warming.
What might be the reasons for his statement?
Answer:

1. Deforestation.
2. Industrialisation and urbanization.
3. Conversion of agriculture lands into residential areas.
4. Home appliances like A/C, refrigerators, vehicle pollution.
5. Population explosion.

Question 2.
What steps do you take to improve natural resources?
Answer:

1. Motivate the people to conserve water.
2. Try to avoid wastage of water whenever possible.
3. Plantation in the vacant lands.
4. Educating the farmer regarding proper utilization of water for irrigation.
5. Encourage the people to recycle the water wherever possible.

Question 3.
Proper utilisation of natural resources is the way to show gratitude to our nation.
Can you support this statement? Give your argument.
Answer:

1. Natural resources of a nation influence its economical and social development.
2. Natural resources are freely available in nature and help in many activities and development of people.
3. The generation of natural resources take a lot of time.
4. They disappear by indiscriminate usage.
5. So proper utilization of natural resources is the way to show gratitude to our nation.

Question 4.
The humans are utilising natural resources indiscriminately. These resources are decreasing more rapidly. Guess what will be the consequences in future?
Answer:
Indiscriminate usage of natural resources causes the following consequences.

1. Reduction in rainfall
2. Drought will occur.
3. Atmospheric temperature becomes increase.
4. The rare species become extinct.

Question 5.
Write any four slogans on the conservation of natural resources.
Answer:
Slogans:

1. Waste water today – live in desert tomorrow
2. Practice eco-friendly methods.
3. Use natural resources judiciously.
4. Save nature – Save future.

Question 6.
There is an increase in the atmospheric temperature year by year. If it continues, guess and write what would be the consequences?
Answer:
If the temperature on earth increases, the consequences would be as follows.
a) All the glaciers and the frozen ice in the polar region start melting leading to rise in the sea water levels.
b) It results in the submergence of low lying coastal areas throughout the world. Millions of people of those areas would lost their homes.
c) Changes in rainfall patterns take place and it result in the occurance of droughts and decrease in crop production.
d) Global warming results in climate change which cause the breakout of climatic sensitive diseases like Malaria, Dengue, Diarrhoea, etc.

Question 7.
There is water scarcity in Ravi’s village during summer. He wants to conduct a rally to create awareness regarding conservation of water. Write any four slogans required to conduct this rally.
Answer:

1. Water is life.
2. Save water – Save a life.
3. Today’s rain water is tomorrow’s life saver.
4. No matter your occupation, water conservation is your obligation.

Question 8.
What steps you take to conserve the biofuels in your daily life?
Answer:

1. Development and usage of alternative energy resources in place of bio-fuels.
2. Minimise the usage of bio-fuels whenever possible.
3. Use public transport, ride by bicycle and walking regularly.
4. Use and purchase energy efficient appliances to save bio-fuels.

Question 9.
Why do we use fossil fuels judiciously?
Answer:

1. Fossil fuels were produced from the remains of ancient plants and animals.
2. They include coal, petroleum (oil) and natural gas.
3. We need to use fossil fuels judiciously because they are non – renewable resources.
4. We need to conserve fossil fuels so we don’t run out of them.
5. The pollution caused by them when burnt, to limit our fossil fuel use.
6. Future generations may not get these resources.
7. Balance in the nature will be disturbed.
8. Electricity production will be stopped.
9. Vehicles running with fossil fuels become useless.

Question 10.
Write two suggestions to create awareness on groundwater conservation.
Answer:

1. We need to adapt different methods to Improve the quality and increase the quantity of groundwater.
2. We should dig water harvesting pits for every house.
3. We should clean the silt, mud fill in tanks and ponds.
4. We should prohibit the establishment of borewells for extraction of groundwater for agricultural and Industrial use.
5. These measures will improve quality and quantity of groundwater.

Question 11.
What is the importance of 4R’s in achieving the goal of “Swachh Bharat”?
Answer:

1. Reduce the production of garbage.
2. Reuse the garbage for the production of manure and electricity.
3. Recycle the garbage by separating It as dry and wet garbage.
4. Recover the plants.

Question 12.
Suggest four measures to conserve fossil fuels.
Answer:
Measures to conserve fossil fuels:

1. Usage of alternatives to fossil fuel.
2. Minimise the usage of fossil fuel.
3. Walk, ride by bicycle and use public transportation whenever possible.
4. Purchase energy efficient appliances.
5. Turn off light and other electronics when you are not using them.

Question 13.
The indiscriminate digging of Borewells may result in what type of consequences in future?
Answer:

1. Due to over drilling of borewells and pulling out water by electric motors, the ground water level Is decreasing day by day.
2. It Is goes on without recharging, ground water becomes scarce.
3. It shows impact on agriculture and the productivity will decrease.
4. Fluorine levels In ground water will increase.
5. Sometimes, saline water may intrude Into the interior places of land and water becomes unfit for consumption.
6. Farmers have to drill the bore wells to more depths which Increase the losses for them.

Question 14.
Ramaiah made broad bed furrow around his field under employment guarantee scheme. Guess the reasons for if. If all the farmers of your village work together, will their water scarcity meet?
Answer:
The reason for Ramaiah making broad bed furrow around his field was, it is useful to conserve soil and water, fertilizer application weeding operations. It also conserves rain water.

The farmers are over coming the water scarcity by sharing water available in the village. They formed groups of farmer including large and small ones who would use the same water resource. Farmers were also motivated to use irrigation techniques like drip irrigation.

Question 15.
What are renewable sources and non-renewable resources?
Answer:
Renewable resources: Resources that can be replaced after they are used are called renewable resources.
Ex: Air, water and soil.
Non-renewable resources: Some other resources, cannot be replaced at all: Once they are used up they are gone forever and are called non renewable resources.
Ex: Coal, Petroleum, Natural gas (fossil fuels).

Question 16.
How do people waste natural resources?
Answer:

1. People often waste natural resources.
2. Animals are over hunted, forests are cleared, exposing land to wind and water damage.
3. Fertile soil is exhausted and lost to erosion because of poor farming practices.
4. Fuel supplies are depleted.
5. Water and air are polluted.
6. Water resources is indiscriminately used for crop growth.

Question 17.
How do people use the forest resources differently?
Answer:

1. The need to conserve resources often conflicts with other needs.
2. For some people, a forest area may be a good place to put a farm.
3. A timber company may want to harvest the area’s trees for construction materials.
4. A business company may want to build a factory or a shopping mall on the land.

Question 18.
What are die effects of deforestation?
Answer:

1. Deforestation destroys wild life habitats and increases soil erosion.
2. It also releases green house gases into the atmosphere, contributing to global warming,
3. Deforestation accounts for 15 per cent of the world’s green house gas emissions.
4. Deforestation also harms the people who rely on forests for their survival, hunting and gathering, harvesting forest products, or using the timber for firewood.

Question 19.
In your opinion What are the causes for soil erosion?
Answer:

1. Soil erosion is caused by poor farming methods such as repeatedly planting the same type of crop in the same place.
2. These methods deplete nutrients in the soil.
3. Soil erosion Is also caused by water and wind currents.
4. When farmers plough up and down hills, soil erosion occurs.
5. Overgrazing by cattle also causes soil erosion.
6. Natural floods causes the extensive damage to the top layer of the soil.

Question 20.
What is Biodiversity? Explain.
(OR)
What is the importance of biodiversity?
Answer:

1. Biodiversity is the variety of living things that populate the earth.
2. The products and benefits we get from nature rely on biodiversity.
3. We need to protect biodiversity to ensure plentiful and varied food sources.
4. Biodiversity is important for more than just food. For instance we use between 50,000 to 70,000 plant species for medicines world wide.

Question 21.
How can we use the fossil fuels carefully?
Answer:
We can use the fossil fuels carefully by taking the following measures.

1. Turn off lights and other electronics when we are not using them.
2. Purchase energy-efficient appliances.
3. Walk, ride a bicycle, if the distance is less.
4. Use public transportation whenever possible.
5. It is better to prefer public transport system like bus or train, instead of travel in personal vehicles.

Question 22.
Why the prices of aluminium and iron are expensive?
Answer:
Earth’s supply of raw material resources is in danger. Many mineral deposits that have been located and mapped have been depleted. As the ores for minerals like aluminium and iron become harder to find and extract, their prices go up.
This makes tools and machinery more expensive to purchase and operate.

Question 23.
What are the effects of mining?
Answer:

1. Many mining methods such as Mountain Top Removal mining (MTR) devastate the environment.
2. They destroy soil, plants and animal habitats.
3. Many mining methods also pollute water and air, as toxic chemicals leak into the surrounding ecosystem.

Question 24.
What did Smt. Indira Gandhi said, while launching the world conservation strategy in India on 6th March 1980?
Answer:
“The interest in conservation is not a sentimental one but the discovery of a truth well known to our ancient stages. The Indian tradition teaches us that all forms of life- human, animal and plant – are so closely inter-linked that disturbance in one gives rise to imbalance in the other” said by Smt. Indira Gandhi.

Question 25.
What are the steps taken by the government to conserve resources?
Answer:

1. Government enacts laws defining how land should be used and which areas should be set aside as parks and wild life preserves.
2. The government enforces laws designed to protect the environment from pollution, such as requiring factories to install pollution control devices and also provide incentives for conserving resources.

Question 26.
What is the necessity of sustainable management of natural resources? Out of the two methods reuse and recycle which one would you suggest to practice and why?
Answer:

1. Sustainable management of natural resources is necessary to Increase the over all life of natural resources specially non renewable resources and also to control the environmental pollution.
2. Both reuse and recycle are the good choice.
3. Reuse: If we reuse something then the cost of recycle will be saved.
4. Recycle: It is not necessary that each and everything can be reused, so after getting recycled the life of the resource will be enhanced.

Question 27.
“Burning fossil fuels is a cause of global warming”. Justify this statement?
Answer:

1. Fossil fuels are composed of carbon, hydrogen, nitrogen and sulphur.
2. When these are burnt they produce CO₂, H₂O, Oxides of Nitrogen and Sulphur.
3. Incomplete combustion of fossil fuels produces green house gases such as CO₂,
4. If huge amount of fossil fuels are burnt, It would produce high amount of CO₂ resulting intense global warming.

Question 28.
Can you suggest some changes in your school which would make it environment friendly?
Answer:
The changes that would make my school environment friendly are

1. Save energy by turning off lights that we are not using.
2. I will suggest to buy recycled paper for decoration and other purposes.
3. Use writing paper on both the sides.
4. Growing trees and plants all around the play ground.

Question 29.
What is the necessity of replenishment of forest? State four reasons.
Answer:
The replenishment of forest is necessary because of the following reasons.

1. It is used to conserve soil.
2. It provides shelter to wild animals.
3. It reduces atmospheric pollution.
4. It controls flood and increases frequency of rainfall.

10th Class Biology 10th Lesson Natural Resources 4 Marks Important Questions and Answers

Question 1.
Forest is renewable resource. But, each year, the Earth loses about 36 million acres of forest. In this type of situation, what suggestions do you give to save forests from turning into non-renewable resources ?
Answer:

1. Forests are the lungs of the world. So I will suggest the following measures to save forests from turning into non-renewable resources.
2. Sustainable forestry practices for ensuing resources into the future.
3. Low impact logging practices, harvesting with natural regeneration in mind. Prevention of removing all the high value trees or all the largest trees from the forests. Recycling methods should be adopted.
4. Replace wood products with alternative sources.
5. Preventing forest fires.
6. Implementing methods like agro forestry, social forestry crop rotation, green plantation, etc. are essential.

Question 2.
What are four R’s? Explain how they help to conserve the environment?
(OR)
Write about the 4 ‘R’s needed for the protection and conservation of environment.
Answer:
By pursuing the maximum of four R’s i.e., Reduce, Reuse, Recycle and Recover, we can save the environment in an effective way.

1. Reduce : It means to use less, I would save electricity by switching off unnecessary lights and fans, prefer walking or cycling than using a vechicle, turn off the engine of car at red light, repair leaky taps and would not waste food.
2. Recycle: It means to collect used things like plastic, paper, galss and metal items and recycle these materials to make required things instead of synthesising or extracting fresh plastic, paper, glass or metal.
3. Reuse: It refers to use things again and again. For example instead of throwing away used envelops, they can be used by pasting new labels.
4. Recover: We should implement ‘recover’ to prevent environmental threat. For example when we cut trees to construct industries or roads for transportation, it is important to grow trees in another areas.

Question 3.
What steps you would like to follow on your part to conserve bio-diversity?
Answer:

1. Biodiversity is the variety of living things that populate the earth.
2. To conserve biodiversity we should avoid hunting.
3. Sustainable forest conservation methods should be followed.
4. I will actively participate Vana Mahosthavam programmes.
5. I will educate and encourage people and make them participate in conservation programmes.
6. Create awareness programmes in and around school.
7. Writing slogans and also make some posters about conservation of biodiversity
8. Judicious use of electricity wherever possible.
9. Finding out of various alternative sources of energy.
10. Plant the saplings in the habitat.
11. Encouraging of social forestry.

Question 4.
Observe the pie diagram showing water resources available in our state for agriculture and answer the given questions.
A) Which water resource is using more for agriculture?
B) What are the consequences of excess utilization of underground water?
C) Which water resource should be utilized for agriculture?
D) What are the alternative ways to increase the underground water resources?

Answer:
A) Ground water.
B) Underground water table will be depleted and scarcity of drinking water will arise.
C)

1. Tanks should be constructed to harvest with rain water.
2. Projects should be constructed across the rivers to store water that can be utilized for agriculture.

D)

1. Construction of rain water storage structures on large scale.
2. Constructing soaking or percolation pits.
3. Contour field bunding.
4. Recharge of wells by building dykes or barriers in the nalla.
5. Plantation in waste lands.
6. Adapting micro irrigation techniques.
   (Any two points you can write)

Question 5.
Forests are renewable resource. Write four sentences supporting this.
(OR)
“Forest is a renewable resource”. Do you agree? Justify.
Answer:

1. Forests are rich habitat for plants and animals. Forests serve as lungs for the world and a bed of nutrients for new fife to prosper.
2. Forest’s pure air protects the earth from green house effect by removing carbon dioxide from the atmosphere and converts it into oxygen.
3. Many fruits, medicines, dyes, sandle wood and bamboo is obtained from forest by local people.
4. Forest provide employment to large number of people and also help in generating revenue.

Question 6.
Observe the above table and answer the following questions.

Village	Type of Farmer	Income per acre on Crops
		Paddy	Cotton	Mirchi	Maize
A	Small	7,500	9,300	5,200	5,000
	Large	26,700	38,000	16,700	12,900
B	Small	7,200	8,750	4,900	5,100
	Large	32,900	42,000	18,400	13,700′

1. Which crop is most suitable to cultivate for small farmer in both the villages?
Answer:
Cotton, paddy

2. If you are a large farmer, which crop do you select to cultivate?
Answer:
Cotton, paddy, mirchi

3. What similarities you have identified in village A and village B?
Answer:
Small and large fanners cultivated same type of crop in both villages. Large farmer gets more income per acre on crops than small farmer in both the villages.

4. Which is the lowest income crop ?
Answer:
Mirchi.

5. Is there any relationship between production of crops and income ? How ?
Answer:
Commercial crops are good for income. Income may or may not related to production of crop. It depends upon demand of the market.

Question 7.
Read the given information and answer the following questions.

A survey was conducted in two villages, Vanaparthy and Vaddicherla of Warangal district in Telangana State. The first with no scarcity and the second with scarce groundwater. Well census was carried out in the villages in order to get a complete picture of well irrigation and its status as well as availability of water. There are no alternative sources of supply as against wells in Vaddicherla, where there is an existing tank that has been converted into a percolation tank, so that the water situation is much better in Vanaparthy.

i) Why did they conduct survey?
Answer:
A compartive study on available water resources irigation method in the Vaddicharla and Wanaparthi of Warangal Dist of Telangana State.

ii) What are irrigation resources in Telangana State?
Answer:
Lakes, wells, canals and ground water etc…,

iii) In which village, do you suggest drip irrigation?
Answer:
Vaddicherla.

iv) Why the water situation is much better in Vanaparthy village compared to Vaddicherla?
Answer:
Existing tank has been converted into a percolation tank.

Question 8.
Observe the Pie diagram and answer the following questions.
i) Identify the fossil fuels from the above diagram.
Answer:
Coal, natural gas, oils are fossil fuels.

ii) Why wastes should be considered as primary energy source in future?
Answer:
The fossil fuels may be exhausted in future. So we may be considered that wastes are primary alternative energy resources.

iii) Why can’t we depend on fossil fuels forever?
Answer:
We can’t depend on fossil fuels forever because fossil fuels are non-renewable resources.

iv) What are the alternatives for fossil fuels?
Answer:
Solar energy, wind energy, tide energy, nuclear energy, energy from waste materials.

Question 9.
Explain the importance and implementation of community based interventions and farmer based interventions for water management.
Answer:
Community based interventions:

1. For water harvesting, there is an urgent need to construct earthen and masonry dams. They help us to store rain water during rainy seasons. They are help in increasing the ground water table.
2. Construction of percolation pits and field bunding are very helpful in the harvesting every rain drop.
3. Open dry wells near nalla canal were recharged by building dykes or barriers in the nalla and maintaining the run – off rain water. The ground water is recharged by these community based interventions.
   Farmer based interventions:
4. Broad Bed Furrow (BBF) land form and contour planting methods are very useful to conserve soil, water and fertilizer application and weeding operations.
5. Planting Gliricidia, a leguminous plant adapted to grow in dry areas on field bunds to strengthen them and make the soil nitrogen rich.
6. Farmers were encouraged to use water resource jointly and irrigate land using micro irrigation methods like sprinklers and drip irrigation.

Question 10.
Explain the farmer based and community based interventions to conserve soil and water resources.
Answer:

Water Management	Collected information
Farmer based water management	1. Farmer based water management implemented individual fields were Broad Bed Furrow (BBF) land form and Contour Planting to conserve in situ soil and water. 2. Use of tropiculator for planting, fertilizer appli­cation and weeding operations. Planting Gliricidia on field bunds to strengthen bunds conserve rain water and supply nitrogen rich organic matter for in situ application to crops. 3. Farmers will obtain 250 kg more pigeon pea and 50 kg more maize per hectare using broad bed furrows and micro irrigation techniques.
Community based water management	1. Fourteen water storage structures (one earthen and 13 masonry dams) with water storage capac­ity of 300 to 2000 m3 were to be constructed in Kothapally village of Rangareddy district. 2. More than 250 rain harvesting structures such as checkdams mini percolation pits, sunken pits and gully plugs were erected in watershed throughout the topo – sequence. 3. Farmers were encouraged for water sharing methods. They formed groups of farmers including large and small ones who would use the same water resource. 4. Farmers have to motivated to use irrigation techni- quies like drip irrigation, sprinklers, etc. 5. Construction of soak pits will help to tap rain water optimally should carry out as community effort.

Question 11.
“The humans who were developed by using the natural resources, today has become the reason for destroying them”. Explain analytically.
Answer:
“The humans who were developed by using the natural resources, today has become the reason for destroying them” – This statement is absolutely true.

1. Primitive man lived in forests and hills. He used the natural resources for his livelyhood. He worshipped nature and used them wisely for his development.
2. After his development, he becomes greedy and using the natural resources indiscriminately and held responsible for their destruction.
3. To meet the needs of growing population, industrialization, urbanization, and huge constructive activities, man utilised natural resources Indiscriminately. At the same time, he did not planned for their revival.
4. But now he realised the importance of natural resources and taken up steps for their conservation. The concept of “Sustainable development” is being implemented in natural resource management.
5. He focussed on development of alternatives for fossil fuels, conservation of water and soil at community level and farmer based interventions.
6. Now he is so keen on conserving forests, wild life and biodiversity.
7. He is so cautious in minimising the utilization of natural resources by following 4’R principle in the day to day life [R – Reduce, R – Reuse, R – Recycle, R – Recover]
8. Now, he is adopting micro-irrigation methods like sprinklers and drip Irrigation to minimise the water usage in low water available areas.
9. He is very interested in following eco-friendly techniques, natural farming methods, using biofertilizers, vermicompost and natural pest control methods in place of toxic chemical pesticides.

Question 12.
The wells and tanks in your village become dry. Ground water levels decreased. Assume the causes for this. Will there be no water scarcity if all the farmers of your village work collectively?
Answer:
Causes for decreasing ground water levels:

1. Varying monsoon behaviour in recent years, there is a pressure on ground water utilization.
2. Indiscriminate tapping of ground water in our village by too much drilling and construction of deep tube wells and bore wells have resulted in over exploitation and depletion of ground water resources.
3. There will be no water scarcity if all the farmers of our village work collectively. Farmers in our village were encouraged to use water resource jointly and irrigate land using micro irrigation techniques. By using micro irrigation techniques farmers in our village obtained more crop yield. Farmers in our village follow the micro irrigation method i.e. drip irrigation and can reduce water consumption by 70% in our village.

Question 13.
Whom do you meet to collect the information of the methods of farmer based, community based water management? Prepare information table to note down your observation.
Answer:
I will meet officials of International Crop Research Institute for Semi – Arid Tropics (ICRISAT) located at Hyderabad to collect information of the methods of farmer based and community based water management.
I also collect information from Central Research Institute for Dry Land Agriculture (CRIDA), National Remote Sensing Agency (NRSA), District Water Management Agency (DWMA) and M Venkatarangaiah Foundation (MVF) and NGO.
The information I gathered from these institutions is summarised below.
Information table:
For Information table See Q.No. 10 in 4 Marks.

Question 14.
Think that there is much scarcity of water for drinking and cultivation in your village. What advice do you give to prevent this?
(OR)
How do you overcome the problem of water scarcity in your village?
Answer:

1. Motivate the people to conserve water.
2. I will educate the people to avoid wastage of water whenever possible.
3. Construction of recharge pits in the house, school and in the open areas to increase the underground water level.
4. Planting trees wherever possible in the village particularly in the vacant lands.
5. Educate the farmers about the micro irrigation system like drip irrigation, sprin¬klers, etc.
6. Encourage the farmers to form groups to share available water among themselves.
7. Construction of percolation tanks in the low lying areas of the village.

Question 15.
What type of fossil fuels are used in your house? What measures do you take to conserve them?
Answer:
Fossil fuels are sources of energy for cooking, heating and burning in our households. Petrol and diesel are being used in our house for transport and running generators and water pumps.
Measures to be taken to conserve fossil fuels in my house :

1. I will put the food material to be cooked on the stove only after arranging all the things which are necessary for cooking.
2. By using pressure cookers 20% gas on rice and 41.5% on meat would be saved when compared to Other cooking means.
3. We must reduce the flame as soon as the boiling process starts in a pressure cooker. This process saves nearly 35% of fuel.
4. I will soak the food material before cooking. It saves 22% of fuel.
5. I will cook food in broad and low depth vessel.
6. I will keep lid on the cooking vessel. If not, it takes more time to cook.
7. For short distances to travel I will go by walk to save fuel for longer distance. I use public transport.
8. Encourage people to use solar water heater and solar cooker.

These AP 10th Class Social Studies Important Questions 14th Lesson The World Between Wars 1900-1950 Part II will help students prepare well for the exams.

AP State Syllabus 10th Class Social 14th Lesson Important Questions and Answers The World Between Wars 1900-1950 Part II

10th Class Social 14th Lesson The World Between Wars 1900-1950 Part II 1 Mark Important Questions and Answers

Question 1.
What does the term “Great Depression” signify?
Answer:

1. There was a worldwide economic decline triggered by a decline in demand and fall in prices. It was called “Great Depression”.
2. The Great Depression began around the end of 1929 and lasted almost till 1939.

Question 2.
Read the following map and answer the question.
Name any one country that shared land boundary with India and not under the control of Japan.
Answer:
Nepal, Tibet, Bhutan.

Question 3.
What was your opinion on Hitler’s treatment of the Jews in Germany?
Answer:
The treatment of Hitler towards Jews is very cruel and unjust.

Question 4.
Mention the important aspects of “New Deal”.
Answer:

1. Relief to the victims of depression.
2. Reform of financial institutions.
3. Steps to ensure economic recovery.

Question 5.
Write any two consequences of economic depression.
Answer:

1. Decline in demand and fall in prices.
2. Massive unemployment.
3. Decline of real incomes of ordinary people.

Question 6.
Write any two economic reforms of Hitler.
Answer:
Hitler’s Economic Policies:

1. Hitler banned all strikes.
2. He reduced tax burden on people.
3. He established war industries.
4. He created employment opportunities.

Question 7.
Write about collective farming.
Answer:

1. In U.S.S.R all small and large farmers were forced to join collective farms.
2. These farms were united and mechanised farming was introduced and the produce was divided among the members.

Question 8.
How did Hitler get all powers to sideline Parliament?
Answer:
Hitler got all powers to sideline parliament by passing the Enabling Act.

Question 9.
What was the intention of the Communist Party of India for helping Britain during the Second World War?
Answer:
The Communist Party of India helped Britain during the Second World War as the Nazis attacked on the soviet union. Intentionally the communists helped Britain.

Question 10.
What was the ‘New Deal Policy’ of Franklin D. Roosevelt?
Answer:
Relief to the victims of depression.
Reform of financial institutions and steps to ensure Economic Recovery by undertaking large public works.

Question 11.
Who was the leader of Bolsheviks in Russia?
Answer:
Lenin was the leader of Bolsheviks in Russia.

Question 12.
What was the major incidence occurred in 1924 in Russia?
Answer:
Union of Soviet Socialistic Republic was established.

Question 13.
Who became the leader of Russia after Lenin in 1924?
Answer:
Stalin.

Question 14.
Enlist Indians that were inspired by communism.
Answer:
M.N. Roy, Tagore and Nehru.

Question 15.
Name the book written on the violation against the opposition in Russia and who wrote it.
Answer:
George Orwell wrote his famous satire “Animal farm” to highlight how the ideals of Russian Revolution were compromised in USSR.

Question 16.
What were the famous “3 Rs” of New Deal Policy?
Answer:
The famous “three Rs” of New Deal are …

1. Relief to the victims of depression.
2. Reform of financial institutions.
3. Recovery of the economy.

Question 17.
What happened to Germany after World War – II?
Answer:
Eventually, Germany was divided into

1. German Democratic Republic of Germany (GDR).
2. Federal Republic of Germany (FRG).

Question 18.
Where were the Nazi generals put to trial?
Answer:
The leaders and Nazi generals were captured and put to trial in the famous “Nuremberg trials.”

Question 19.
Name the organization formed after World War – II to establish peace.
Answer:
United Nations Organization.

Question 20.
Enlist the countries that got independence by 1950.
Answer:
India,. China, Indonesia, Vietnam, Egypt, Nigeria, etc.

Question 21.
What were the super powers emerged after 1945?
Answer:
The USA and the USSR.

Question 22.
What was “Socialistic camp”?
Answer:
Eastern Europe and China together came to be known as “the Socialistic camp.”

Question 23.
Why did the common people not want the war?
Answer:
Fatigued by military reserves and upset at economic shortages, the common people did not want the war.

Question 24.
Who led Bolsheviks?
Answer:
Vladimir Lenin led the Bolsheviks.

Question 25.
Why could full peace not return to Russia after October Revolution?
Answer:
Full peace could not return to Russia, as the liberals decided to continue the war to preserve the honour of their land.

Question 26.
Expand the USSR.
Answer:
The Union of Soviet Socialist Republics.

Question 27.
When did the Great Depression begin?
Answer:
The Great Depression began around the end of 1929 and lasted almost till 1939 when the Second World War began.

Question 28.
Who was the President during the Depression?
Answer:
Franklin Delano Roosevelt.

Question 29.
What was the ‘New Deal’?
Answer:
It was a programme created by the US to help the Americans and the economy.

Question 30.
What were ‘Three Rs’?
Answer:
The Three Rs are:

1. Belief to the victims of Depression.
2. Reform of financial institutions and
3. Steps to ensure economic Recovery.

Question 31.
What else was introduced in the US?
Answer:
The Social Security system was introduced.

Question 32.
What is meant by Social Security system?
Answer:
It is a permanent system of universal retirement pensions, unemployment insurance, and welfare benefits for handicapped and needy children in families without father present.

Question 33.
Why did Germany face severe crises of the war?
Answer:
German economy faced severe crises after the war as it was saddled with the burden of paying war damages, etc.

Question 34.
Which act of the German government resulted in unheard of inflation?
Answer:
The German government began to print currency notes on a large scale and this resulted in unheard of inflation.

Question 35.
How did Hitler mobilise his supporters?
Answer:

1. Hitler mobilized his supporters on the promise of establishing the racial supremacy of Aryan Germans over the world and by targeting minority communities like Jews as the main cause of all problems.
2. He also guaranteed employment to people.

Question 36.
How did Hitler attack communism and capitalism?
Answer:
Hitler attacked communism and capitalism terming both of them as Jewish conspiracies and promised to build a strong state which would counter both.

Question 37.
How did he appeal to the middle class?
Answer:
Hitler appealed especially to the middle class which felt threatened by capitalism and the Great Depression and at the the same time was opposed to working-class movement led by the Communists and Socialists.

Question 38.
Name the security forces in Germany.
Answer:
Regular police in a green uniform and the SA or the Storm Troopers, Gestapo (secret state police), the SS (the protection squads), criminal police and the Security Service (SD).

Question 39.
What was Auschwitz?
Answer:
Auschwitz was a killing centre.

Question 40.
Why were Soviet forces welcomed all over Eastern Europe?
Answer:
Soviet forces were welcomed all over Eastern Europe as liberators from the hated Nazi rule and eventually captured Berlin, the capital of Germany.

Question 41.
What happened to Hitler and his close associates?
Answer:
Hitler and his close associates committed suicide to avoid being captured and tried.

Question 42.
Who sentenced the Nazis?
Answer:
The Nuremberg Tribunal sentenced only eleven leading Nazis to death.

Question 43.
What were the two super powers?
Answer:
The USA and the USSR.

Question 44.
What did Hitler promise?
Answer:

1. Hitler promised employment for those looking for work and a secure future for the youth.
2. He promised to weed out all foreign influences and resist all foreign ‘conspiracies’ against Germany.

Question 45.
Who laid way for planned economic development in Russia?
Answer:
Stalin in 1928.

Question 46.
What were the policies of Stalin?
Answer:
Stalin followed a twin policy of rapid industrialization and collectivization of agriculture.

Question 47.
Name Indian Leaders who were inspired by the Russian Revolution.
Answer:
M.N. Roy, Tagore and Nehru were inspired by the Russian Revolution.

Question 48.
What does the book “Animal Form” mention about?
Answer:
The book highlighted, how the ideals of the Russian Revolution were compromised in USSR.

Question 49.
What was the Enabling Act?
Answer:
The Act was passed in 1933. This act established a dictatorship in Germany.

Question 50.
Who was the famous economist of Hitler?
Answer:
Hjalmar Schacht.

Question 51.
Expand GDR and FDR.
Answer:
G.D.R – German Democratic Republic.
F.D.R – Federal Republic of Germany.

Question 52.
What happened to Germany after World War – II?
Answer:
Germany was divided into two portions.

1. The Eastern Part – GDR.
2. The Western Part – FDR.

Question 53.
Which countries came under “the socialist camp”?
Answer:
Russia along with the Eastern European countries and China came under the socialistic camp.

10th Class Social 14th Lesson The World Between Wars 1900-1950 Part II 2 Marks Important Questions and Answers

Question 1.
Read the following paragraph and answer the question.

“In fact, the second World War helped USA grow out of its economic misery caused by the Great Depression. Far from the theatres of war, the industries and agriculture of USA prospered and achieved full employment and high productivity. In Harry Truman’s words, “We have emerged from this war as the most powerful nation in the world.”

How do you think the Second World War helped USA grow out of its economic misery from the Great Depression? Write your comment.
Answer:
The Great Depression began around the end of 1929 and lasted almost till 1939 when the World War-II began. There was a sudden fall in the American stock market.

This effected almost all the nations in the world. Roosevelt, the US President, announced ‘The New Deal which promised Relief to the victims of Depression. However, the real break came from the outbreak of war when state expenditure on armies and armaments suddenly increased giving a big boost to factory production and demand for farm produce. Thus the Second World War helped USA grow out of its economic misery from the Great Depression.

Question 2.
Observe the given timeline chart and answer the following questions.

a) How do you think the victory on Auschwitz and liberation by the Soviet Union led to an easy success for the Allied nations?
Answer:
After the liberation of Auschwitz the Allied got victory in Europe. So I can say so.

b) What were the main incidents which occurred in 1941 in world’s history?
Answer:

1. Germany invaded the USSR.
2. Mass murder of the Jews begins.
3. The United States joins the Second World War.

Question 3.
Observe the given map and answer the questions:
a) What is Dutch East India called now?
Answer:
Indonesia

b) Which Chinese region was under the control of Japan?
Answer:
Manchuria

Question 4.
Write any two effects of great depression.
Answer:

1. Increase in unemployment.
2. Fall in prices.
3. Closure of industries.
4. Decrease in the purchasing capacity of the people.

Question 5.
Read the below paragraph.

“This earth is not allotted to anyone nor is it presented to anyone as a gift. It is awarded by providence to people who in their hearts have the courage to conquer it, the strength to preserve it, and the industry to put it to the plough. A vigorous nation will always find ways pf adapting its territory to its population size.”

Do you think world should belong to those who have power and strength alone – Comment.
Answer:

1. No. I don’t think like that.
2. The world belongs to all. All are equal by birth.

Question 6.
“Constitution is a living and changing document.” Would you agree with it? Justify it.
Answer:

1. Yes, I agree with it.
2. Our constitutional makers are aware that laws will have to be amended from time to time. So they provided an opportunity to amend laws.

Question 7.
Observe the Map and answer the questions given below:

1. Name any two countries which were not under the control of Japan.
Answer:
India, Nepal and Tibet.

2. Dutch East Indies was the former name of which country?
Answer:
Indonesia.

Question 8.
What will be the consequences of the World War that may happen after the Second World War?
Answer:
The consequences of the World War that may happen after the Second World War are

1. Huge loss of life on the earth
2. Destruction of properties
3. Increase of environmental damage
4. The existence of life becomes difficult

Question 9.
What were the changes brought about by Russian revolution of 1917 in the Russian Society?
Answer:

1. The immediate change was the elimination of the democratic provisional councils called Soviets in various larger cities.
2. Under Bolshevik rule Russia got out of World War-II.
3. A Socialist system was imposed on the country which all but the smallest businesses were taken over by the government.
4. Land was redistributed to peasant farmers and food distribution was temporarily improved.
5. Soon though, many people became disenchanted with the Bolsheviks and the Russian Civil war broke out in 1918 and lasted until 1920.

Question 10
Observe the map and answer the questions.

1. Mention any two countries that were NOT under Japanese control.
Answer:
India, Tibet, Nepal, Mongolia, U.S.S.R. (any two)

2. Which part of the Ocean did Japan dominant in 1942?
Answer:
North Part of Pacific Ocean.

Question 11.
Read the following paragraph and write your opinion on it.

“With this began a great experiment of building a country without exploiters like feudal lords, Kings or capitalists. The USSR tried to build a society that was industrialized and modern and yet did not have inequality or exclusion of people on basis of birth, gender, language, etc.”

Answer:

1. The Soviets under the leadership of Bolsheviks seized power from the provisional government in 1917.
2. Peace could not be established as civil war lasted from 1918-20.
3. Finally the USSR was established in 1924.
4. This was an experiment as there was no place for feudal lords, kings or capitalists.
5. The USSR tried to establish a society where there was no scope for inequality or exploitation on the basis of birth, gender, language, etc.
6. Socialism was established and gave a big’ blow to the capitalistic world.

Question 12.
Observe the map and answer the following questions.

1. Mention any two countries which are not under the control of Japan.
Answer:
India and China are not under the control of Japan.

2. Mention any two places which are under f ‘ the control of Japan and lying on its western side.
Answer:
Korea and Manchuria.

Question 13.
What do you know about Tsarist Russia?
Answer:
Tsarist Russia was vast landmass spread over two continents and making it a Euro Asian Power. It had the third-largest population in the world, viz. 156 million, after China and India. It comprised of several nations like the Russia, Ukraine, Uzbekistan, .’Kazakhstan, Tajikistan, Turkomania, etc.

Question 14.
What was the first Russian revolution of 1917?
Answer:
On March 8th 1917, around 10,000 women of the capital, St Petersburg, took out a procession demanding ‘Peace and Bread’. Workers joined them in this protest. Unnerved at the protest in the capital, Tsar Nicholas II ordered the army to suppress the demon¬strators, even by firing at them. Instead, the soldiers joined the demonstrators. In just two days, the situation went so much out of hand that the Tsar abdicated and non-aristocratic Russians made a Provisional government. This was the first Russian revolution of 1917 and it was called the March Revolution.

Question 15.
“The October Revolution was not spontaneous” – Why?
Answer:
A bigger revolution was made later in October 1917 and it was not spontaneous. The liberals and aristocrats, who ruled Russia after the abdication of the Tsar, decided to continue the War to preserve the honor of the fatherland. Fatigued by military reverses and upset at economic shortages, the common people did not want the War. They began organizing themselves in councils which were called Soviets. Such Soviets of soldiers, industrial workers, and also people in rural areas were the expression of com-mon people’s power which was channelized by a group of Russian Communist party called Bolsheviks.

Question 16.
Why were Bolsheviks able to win the confidence of the Soviets?
Answer:
Bolsheviks were able to win the confidence of the Soviets because they took up the demand for immediate and unconditional peace, nationalization of all land and its redistribution to the peasants and control over prices and nationalization of all factories and banks.

Question 17.
What effect did the war have, on the industry of Russia?
Answer:
Russian industries were very few numbers and the country was cut off from other suppliers of industrial goods by German control of the Baltic sea. Industrial equipment disintegrated more rapidly in Russia than elsewhere in Europe. By 1916 railway, lines began to breakdown. Able-bodied men were called up to the war. As a result, there were labour shortages and small workshops producing essential commodities were shut down.

Question 18.
Discuss briefly the Five-Year Plans.
Answer:

1. A process of centralized planning was introduced by Stalin in 1928. Officials assessed how the economy could work and set targets for a five-year period, on this basis they made five-year plans.
2. The government fixed all prices to pro-mote industrial growth during the first two plans. (1927-32, 1933 – 38)
3. Centralised planning led to economic growth.

Question 19.
Appreciate the role of Lenin in the Revolu¬tion and his economic policy.
Answer:

1. Vladimir Lenin played an important role in the Russian Revolution of 1917.
2. He led the revolutionaries after the fall of the war.
3. The Bolshevik party put forward clear policies to end the war.
4. He transferred land to the peasants and advance the slogan ‘All power to the Soviets’.
5. These were the real objectives of the Russian Revolution and he fulfilled them. So, Lenin’s name has become inseparable from the Russian Revolution.

Question 20.
Write any two conditions which led to the Russian civil war in 1918-1920.
Answer:

1. The Russian army began to break up after the Bolsheviks ordered land redistribution. Soldiers who were mostly peasants wished to go home for the land and desert.
2. Supporters of private property among ‘Whites’ took harsh steps with peasants who had seized land.

Question 21.
How can you say that the experience of the USSR inspired people all over the world including India?
Answer:
The experience of the USSR inspired people all over the world who were committed to the ideals of equality and national liberation. A large number of them now became communists and tried for a communist revolution in their countries. Many of them like MN Roy, Tagore and Nehru were inspired by it even though they did not agree with many aspects of communism like suppression of opposition political parties.

Question 22.
Describe what happened to Germany after its defeat in the First World War.
Answer:

1. World War -1, ended with the Allies defeating Germany and the Central Powers in November 1918.
2. The Peace Treaty of Versailles with the Allies was a harsh and humiliating treaty.
3. Germany lost its overseas colonies, a tenth of its population, 13 percent of its territories, 75 percent of its iron and 26 percent of its coal to France, Poland, Denmark and Lithuania.
4. The Allied Powers demilitarised Germany to weaken its power. Germany was forced to pay compensation amounting to 6 billion.

Question 23.
Explain the role of women in Nazi Germany.
Answer:

1. According to Hitler’s ideology, women were radically different from men.
2. The democratic idea of equal rights for men and women was wrong and would destroy society.
3. While boys were taught to be aggressive, masculine and steel-hearted, girls were told that they bad to become good mothers and rear pure-blooded Aryan children.

Question 24.
Explain the rallies of Nazis.
Answer:
Hitler devised a new style of politics. He understood the significance of rituals and spectacle in mass mobilization. Nazis held massive rallies and public meetings to demonstrate the support for Hitler and instill a sense of unity among the people. The Red banners with the Swastika, the Nazi salute, and the ritualized rounds of applause after the speeches were all part of this spectacle of power.

Question 25.
Write about the Enabling Act.
Answer:
On 3 March 1933, the famous Enabling Act was passed. This Act established a dictatorship in Germany. It gave Hitler all powers to sideline Parliament and rule by decree. All political parties and trade unions were banned except for the Nazi Party and its affiliates. The state established complete control over the economy, media, army and judiciary.

Question 26.
Explain the condition of the people of Germany after the famous Enabling Act passed.
Answer:
People could now be detained in Gestapo torture chambers, rounded up and sent to concentration camps, deported at will or arrested without any legal procedures. The police forces acquired powers to rule with impunity.
These powers were used to arrest and torture millions of political activists, trade unionists and people of minority communities and build a state of unprecedented horror and fear.

Question 27.
What happened in the far east with the bombing of Hiroshima and Nagasaki?
Answer:
In the far east with the bombing of Hiroshima and Nagasaki Japan surrendered to the USA. US armies occupied Japan but keeping in the sentiments of Japanese allowed the Japanese Emperor to continue. But it built a Constitutional Monarchy like in England. Japan was to be ruled by the elected government responsible to the Parliament (DIET).

Question 28.
Name the Indian leaders inspired by the USSR Communist regime.
Answer:

1. The experience of the USSR inspired people all over the world who were committed to the ideals of equality and national liberation.
2. Many of them like Manavendra Nath Roy, Rabindranath Tagore, and Jawaharlal Nehru were inspired by it even though they did not agree with many aspects of communism like suppression of opposition political parties, etc.

Question 29.
How was the economic revival planned after World War II?
Answer:

1. There were many economies that collapsed after World War II.
2. The USA came up with the Marshall Plan to fund the economic revival of West European countries.
3. The USSR came up with a package for the revival of East European countries.

10th Class Social 14th Lesson The World Between Wars 1900-1950 Part II 4 Marks Important Questions and Answers

Question 1.
Write a short note on the measures taken by the USSR under the great depression.
Answer:

1. USSR was not integrated with the international market.
2. It had a planned economy.
3. The state decided what and how much has to be produced.
4. This enabled them to maintain a balance between demand and supply.

Question 2.
A) Locate and Label any four of the permanent members of United Nations Security Council on the World map given.
Point out the following countries on the World map given.
B) 1) Portugal 2) Nigeria S) Chile 4) Japan
Answer:
Question 3.
Explain the rise of Nazism in Germany.
Answer:

1. German economy was the worst hit by the Great Depression.
2. This economic crisis created deep anxieties and fears in people.
3. Hitler and his Nazi party used this situation in an intelligent manner.
4. Hitler, by his words and passion, moved the people.
5. He promised them to construct a strong Germany in all aspects.
6. He devised a new style of politics and attracted people.
7. As a result of this, the Nazi Party has become the largest party by 1932.
8. By passing the Enabling Act in 1933, Hitler became the dictator of Germany. Nazi government had become most powerful.

Question 4.
Answer the questions with the help of Time-line chart.

1. What was the immediate cause for the Second World War?
Answer:
Invasion of Poland by Germany.

2. When did the United States enter into the World War – II?
Answer:
Dec. 8, 1941

3. The Weimar Republic belongs to which country ?
Answer:
Germany

4. Write any two important incidents occurred in 1941.
Answer:
Germany invades the USSR Mass murder of the Jews begins The United States joins Second World War

Question 5.
Observe the graph and answer the questions given below:

1. Which was the first country that established the socialist government in the world?
Answer:
Russia (OR) USSR.

2. Why did the Civil war occur in Russia?
Answer:
Civil war was broke out between Bolshevik group and White army for establishment of Socialism and political monarchism, ecomonic capitalism. Bolsheviks were favour to Socialism and White group was favour to Economic capitalism.

3. What were the Russian emperors called?
Answer:
Tzars.

4. Name the international organization which was formed to promote socialist ideology.
Answer:
Formation of Comintern (Third international at Moscow in 1919).

Question 6.
Russian revolution brought in many changes in their society. What were they? And what challenges did they face?
Answer:
Changes in the Russian Society:

1. The immediate change was the elimination of the democratic provisional councils called Sovi¬ets in various larger cities.
2. Under Bolshevik rule Russia got out of World War – II.
3. A Socialist system was imposed on the country which all but the smallest businesses were taken over by the government.
4. Land was redistributed to peasant farmers and food distribution was temporarily improved.
5. Soon though, many people became disenchanted with the Bolsheviks and the Russian Civil war broke out in 1918 and lasted until 1920.

Challenges they faced:

1. Famines
2. Resistances
3. Low standards of living
4. The Great Depression
5. Unemployment
6. Lack of educational facilities
7. Cheap public health care, etc.

Question 7.
What were the agricultural reforms of Joseph Stalin in the USSR?
Answer:

1. After the death of Lenin in 1924 Stalin emerged as the leader of the Communist Party.
2. The USSR began a programme of planned economic development with its Five Year Plans in 1928.
3. This pursued a twin policy of rapid industrialization and collectivization of agriculture.
4. The USSR under the leadership of Joseph Stalin tried to end small peasant production by forcing all small and large farmers to surrender their lands and join “Collective Farms” and share the products.
5. Farmers worked together and the produce was divided among the members of the farms.
6. After an initial period of decline, agricultural production soon rose and helped the USSR to also build its industries on an unprecedented scale.
7. All industries were owned by the state which did not allow a free-market system.
8. An extended schooling system developed, and arrangements were made for factory workers and peasants to enter universities.

Question 8.
What are the impacts of the great economic depression in the USA?
Answer:
Impacts of the great economic depression in the USA:

1. The Great Depression began around the end of 1929 and lasted almost till 1939 when the Second World War began.
2. In this period decline in demand and fall in prices.
3. The decline in demand led to closure of factory production which in turn meant further de-cline in the purchasing power of people.
4. It initially began with a stock market collapse in the U.S.A., but before long affected almost every country.
5. As many as 25% Americans were unemployed.
6. This in turn caused a collapse of prices (up to 60%) for agricultural produce causing pauperisation of millions of farmers and stopping of cultivation.
7. It had devastating social consequences sharply increasing poverty, desolation, homelessness, etc.
8. F.D. Roosvelt who became the President of the US announced “the New Deal” policy to re-cover America from Great Depression.

Question 9.
What are the consequences of the World Wars?
Answer:
The World Wars had a long-lasting impact on the politics, society and economy of the world.
These can be enumerated as follows:

1. Enormous human cost: The first consequence of the wars was widespread deaths and injuries. Many persons who were under forty years of age died.
2. Democratic principles asserted : The two wars also brought home the dangers of having un-democratic governments and greatly strengthened the case for democratisation of power.
3. New balance of power: With World War I the German, Austro-Hungarian, Russian and Turk-ish empires came to an end. When World War II came to an end, the map of the world changed yet again as ex-colonies rose to become independent nations.
4. New international organisations After World War I, the League of Nations was formed to resolve disputes peacefully and the United Nations Organisation (UNO) was formed after World War II.
5. Enfranchisement of women : After a long struggle for political right like right to vote – British women got these rights in 1918. With men away in the battle fields, more women had to work in factories, shops, offices, voluntary services, hospitals and schools. Beginning with the confidence of being bread-winners, women began raising their voice for equality in all walks of life.

Question 10.
Read the following paragraph and write your interpretation.
“USSR, started a great experiment of building a country without exploiters like feudal lords, kings or capitalists. The USSR tried to build a society that was industrialized and modern and yet didn’t have inequality or exclusion of people on the basis of birth, gender, language, etc.”
Answer:

1. The given paragraph says that USSR has established a country with equality.
2. There are no exploiters, no dominants and no sufferers.
3. Though if followed industrialisation and modern technology and updated life, it didn’t have no inequality in any form.
4. It is the real spirit of socialism.
5. A country with equality and modern development is never expected in any country but it happened in USSR at that time.
6. In any country, we can see some sort of discrimination.
7. In some countries, discrimination is seen in the form of colour, i.e. the Blacks and the Whites.
8. In our country, some castes are treated as high castes and some other castes as low.
9. Boys are sent to higher education whereas the girls are not sent because of various reasons like safety and security.
10. Many countries have mentioned in the preamble of their constitutions that they give impor¬tance to equality and there will be no discrimination in any form.
11. In conclusion, I would say that every country should maintain equality.
12. The downtrodden should be uplifted.
13. A country with equal treatment is always an ideal one to all the nations.

Question 11.
Read the following paragraph and write your interpretation.
“The Nazi’s police powers were used to arrest and torture millions of political activists, trade unionists and people of minority communities, especially the Jews. They did all this to build a state of horror and fear”.
Answer:

1. The given paragraph conveys about the cruel policy of the Nazi soldiers.
2. Hitler arrested and tortured millions of German political leaders and activists, trade union leaders.
3. Minorities were also targeted.
4. This situation created a horrible state under the leadership of Hitler in Germany.
5. When Hitler won the elections of 1932 he brought the Enabling Act and many special forces like Gestapo, protection squads, security services besides different troopers.
6. These forces worked brutally and created horror and fear among the people.
7. Hitler did not allow any political party or trade union to work out.
8. He instructed all the people to follow the Nazis.
9. There was no peace.
10. He treated the Jewish people as his enemies.
11. Everyone criticized Hitler mainly because of his cruel treatment with the Jewish people.
12. The whole Germany was horrified of his activities.
13. In conclusion, I feel that Hitler’s activities are unlawful and undemocratic.
14. Nowadays all the countries are moving towards democratic governments.
15. All the countries should concentrate on literacy rate and so various programmes are to be taken up and implement strictly.
16. So that there will be no scope for such situation in any country.

Question 12.
What are the situations that led to strengthening Nazism in Germany?
Answer:
The situations that led to strengthening Nazim in Germany:

1. The burden of paying war-damages.
2. Inflation increased.
3. The economy was worst hit by depression.
4. Unemployment increased.
5. Savings of the people diminished.
6. Small businessmen were ruined.
7. Big businessmen were in a crisis.
8. Organized workers could manage to survive.
9. Peasants were affected by fall in agricultural prices.
10. Women were unable to feed their children.
11. No stable rule.

Question 13.
Observe the following table and write a paragraph analysing it.

Answer:
Annual National Defence Expenditure

1. The table shows that the annual defence expenditure of great countries Britain and Germany has been increasing since 1933.
2. In the year of 1939, the expenditure increases because of the armament race, protection from enemies why because already they tasted the World War -1.
3. The government of these countries also helped to them to spend more money on defence. Ag-gressive nationalism also created proud of their country and desire of superiority in the world and also responsible to more expenditure on defence.
4. Million dollars spend for defence only during the period of 1933 to 1939.
5. At present some countries also spend more money on defence because of enemies. If every country realise and maintain friendly relations with other countries, and they spend million dollars for peace and development of poor people, automatically the world peace will de¬velop and every person live with without fear of war and tension in the world.

Question 14.
Observe the following Bar-graph and analyse it.
Answer:

1. The given bar graph is about the Explosive Production of two developed industrialised countries of West, i.e. Britain and Germany during World War-1.
2. Both countries belonged to two enemy groups or blocks.
3. In 1914 the explosive production of Britain and Germany is 4 tonnes and 8 tonnes respectively.
4. From that year onwards the production increased on a large scale in both the countries.
5. The difference is that the explosive production is less for Britain when compared to Germany in 1914.
6. But this situation reversed in 1917. The explosive production of Britain increased by over 45 times, i.e. from 4 tonnes to 184 tonnes during the years from 1914 to 1917 whereas the production of Germany increased by approximately 18 times, i.e. from 8 tonnes to 140 tonnes for the same period.

Question 15.
Explain briefly about the consequences of the World Wars.
Answer:
The World Wars had a long-lasting impact on the politics, society and economy of the world.
These can be enumerated as follows:

1. Enormous human cost: The first consequence of the wars was widespread deaths and injuries. Many persons who were under forty years of age died.
2. Democratic principles asserted: The two wars also brought home the dangers of having un-democratic governments and greatly strengthened the case for democratisation of power.
3. New balance of power: With World War I the German, Austro-Hungarian, Russian and Turkish empires came to an end. When World War II came to an end, the map of the world changed yet again as ex-colonies rose to become independent nations.
4. New international organisations: After World War I, the League of Nations was formed to resolve disputes peacefully and the United Nations Organisation (UNO) was formed after World War II.
5. Enfranchisement of women: After a Jong struggle for political right like right to vote – British women got these rights in 1918. With men away in the battle fields, more women had to work in factories, shops, offices, voluntary services, hospitals and schools. Beginning with the confidence of being bread-winners, women began raising their voice for equality in all walks of life.

Question 16.
Observe the poster and answer the questions.
a) Which country issued this poster?
b) What was the purpose of this poster?
c) What does the Swastika in the poster stand for?
d) During which war was this poster was published?
Answer:
a) U.S.A issued this poster.
b) War bonds were offered by the U.S.A. Government for purchase by the public to fulfill the military operations and other expenditure in times of war.
c) The three young children, apprehensive and fearful, as they are enveloped by the large dark arm of swastika shadow.
(OR)
Simply, Germany is going to occupy the U.S.A also.
d) This war bonds poster was published during the time of second World War.

Question 17.
Describe the course of Russian Socialist Revolution.
Answer:

1. Russian socialist revolution in 1917 took place in two phases – March 1917 and November 1917.
2. 10,000 women took procession demanding ‘Peace and Bread’ and supported by many later.
3. In just two days Tsar Nicolas II abdicated throne and provisional government was set up in search 1917.
4. It wished to continue the war and economic shortage was not addressed.
5. Soviets (the councils of peasants, workers and soldiers) were organised by Bolshevik leader Lenin.
6. They seized political power from provisional government.
7. They took steps to end the war and redistributed land.
8. They made control over prices and nationalized industries, banks, etc.
9. They suppressed the long-drawn civil wars.
10. By 1924, the USSR – Union of Soviet Socialist Republics was formed.

Question 18.
Give an estimate of the world at the end of first half of the 20th century.
Answer:

1. The first half of the 20th century ended with the nightmare of Hiroshima and Nagasaki and with the hopes generated by the founding of the UNO.
2. The Second World War ended with the ending of large colonial empires of Britain, France, Japan, Italy and Germany.
3. By 1950, countries like India, China, Indonesia, Vietnam, Egypt, Nigeria etc. became independent.
4. Britain which was the most powerful country now became a secondary power.
5. Two new superpowers emerged on the World scene : the USSR and the USA.
6. The USSR, which bore the main burnt of Hitler’s war and faced enormous destruction, gradually rebuilt its economy.
7. Its victory however, greatly enhanced its prestige in the world and it was now joined by the entire Eastern Europe and China to form a large ‘Socialist Camp’.

Question 19.
Observe the timeline chart and answer the following questions.

1. When and how were the foundation for socialism laid?
Answer:
The foundations for socialism were laid between 1850¬1880 due to debates over socialism.

2. How many revolutions took place in Russia?
Answer:

1. Revolution of 1905 .
2. The February Revolution of 1917 and the October revolution of 1917.

3. Did the peace establish in Russia after 1917?
Answer:
No, civil war broke out between 1918-20.

4. What do you mean by collectivization?
Answer:
The land was collected and farmer worked together and shared the produce. This was collectivization.

Question 20.
Locate the following points in the world map.

1. St. Petersberg
2. Moscow
3. Kyrgyzstan
4. Ukraine
5. Uzbekistan
6. Tajikistan
7. Kazakistan
8. Turkomania

Answer:

Question 21.
Observe the following map.

Answer the following questions after reading the map.

1. Which neighbouring country of India was occupied by Japan?
Answer:
The neighbouring country of India that was occupied by Japan was Burma.

2. What is Dutch East India called now ?
Answer:
Dutch East India is now called ‘Indonesia’.

3. Most of the area under control of Japan is a part of which ocean?
Answer:
Most of the area under the control of Japan is a part of Pacific Ocean.

4. Which Chinese region was under the control of Japan ?
Answer:
Manchuria was the Chinese region that was under the control of Japan.

5. Was Mongolia under the control of Japan in 1942?
Answer:
No. It was not under the control of Japan in 1942.

Question 22.
Locate the following in the given map of World.

1. Stalingrad

2. In 1939 Germany attacked on this country
Answer:
Poland

3. St. Petersberg

4. This country faced more destruction due to releasing atom bombs by America
Answer:
Japan

5. Capital of Poland
Answer:
Warsaw

6. Capital of Austria
Answer:
Vienna

7. Corsica Island

These AP 10th Class Social Studies Important Questions 12th Lesson Sustainable Development with Equity will help students prepare well for the exams.

AP State Syllabus 10th Class Social 12th Lesson Important Questions and Answers Sustainable Development with Equity

10th Class Social 12th Lesson Sustainable Development with Equity 1 Mark Important Questions and Answers

Question 1.
1. How does the Green Revolution lead to an increase in food grains?
Answer:

1. Use of high yielding varieties.
2. Improvement of irrigational facilities.
3. Use of new methods of cultivation.
4. Use of pesticides and fertilisers.

Question 2.
What is the main theme of Rachel Carson’s book ‘Silent Spring’?
Answer:
The impact on birds and human beings of spraying DDT for mosquito control.

Question 3.
What is the aim of Chipko movement?
Answer:
The main aim of Chipko Movement is to protect forests.

Question 4.
Write any two slogans on the environmental protection.
Answer:

1. Save the environment, save life.
2. Save the nature to save the future.
3. Go green and eliminate the global warming.

Question 5.
Write one main characteristic of organic farming.
Answer:
In organic farming the farmers use local resources including on-farm biological processes. Pest predators available them. Micro-organisms which make nutrients more accessible to the plants. Chemical fertilizers and pesticides are not used only for animal manure.

Question 6.
What is HDI as a measure of development?
Answer:
As a measure of development, HDI is an improvement over GDP and per capita income.

Question 7.
Which expands the meaning of development?
Answer:
HDI expands the meaning of development to include social indicators of education and health.

Question 8.
Which are central to the production process?
Answer:
Many naturally existing substances like land, water, minerals and ores, products from trees and animals are central to the production
process.

Question 9.
What does the overuse of ground water imply?
Answer:
Over use of ground water implies that the stock of groundwater is being depleted. Very rapidly the ground water has been falling to lower and lower levels.

Question 10.
Which are central to modern development?
Answer:
Irrigation and power have been produced and both are central to modern development.

Question 11.
What is called NBA?
A. The resistance to Sardar Sarovar and other
dams with similar consequences in the Narmada valley has taken the form of a social movement. It is called Narmada Bachao Andolan (NBA).

Question 12.
“It is unjust to ask the poor people”
What is it?
Answer:
We have several thousands of communities living off the environment. To destroy the environment means to destroy these communities. It is unjust to ask poor people to bear the cost of development.

Question 13.
Which governments banned chemical fertilizers and pesticides?
Answer:
The Sikkim government and Uttarakhand government.

Question 14.
When did the Chipko movement start and where?
Answer:
The Chipko movement started in the early 1970s in the Garhwal Himalayas of Uttarakhand.

Question 15.
Expand HDI.
Answer:
Human Development Index.

Question 16.
What is meant by “Water Recharge”?
Answer:
Water Recharge means the percolation of water into the ground to be extracted.

Question 17.
Write about Chipko Andolan?
Answer:
Chipko means embrace the villagers hugged the trees saving them interposing their bodies between them and the contractor’s axes.

Question 18.
What are the natural resources to use in production?
Answer:
Natural resources used in production are land, water, and minerals, forests, etc.

Question 19.
What is meant by sustainable development?
Answer:
Sustainable development is a development that meets the needs of the present without compromising the ability of future generations to meet their own needs.

Question 20.
What are the activities to take up through an alternative Public Distribution System?
Answer:
Alternate PDS advocates the practice of millets, establishment of community grain bank, issue of cards and ensuring food security in the village.

10th Class Social 12th Lesson Sustainable Development with Equity 2 Marks Important Questions and Answers

Question 1.
Observe the table which shows the growth in the extraction of some key-minerals in India.
Answer:
Extraction of minerals in a thousand Tonnes

Minerals	1997-1998	2008-2009
Bauxite	6,108	15,250
Coal	2,97,000	4,93,000
Iron ore	75,723	2,25,544
Chromite	1,515	3,976

After your observation, what do you think about the environmental loss of such rapid growth of mining.

1. Ground water pollution would increase.
2. Temperatures would increase.
3. Air pollution would increase near the mining areas.
4. Water storage capacity would decrease due to soil erosion.
5. Extreme burning of coal leads to ozone depletion.
6. Accidents may occur due to heavy mining.
7. People may face natural calamities like earthquakes.

Question 2.
What is meant by sustainable development?
Answer:
Sustainable development is a development that meets the needs of the present without compromising the ability of future generations to meet their own needs. In other words, a better quality of life for everyone – now and for generations to come.

Question 3.
How does organic farming promote bio-diversity?
Answer:

1. Chemical fertilizers and pesticides are not used in organic farming.
2. Only echo friendly farming techniques are used.
3. Methods like crop rotation, using compost and use of Local resources are used.
4. Number of crops are produced in farms instead of one or two crops.

Question 4.
Write two slogans on enlightening people regarding “environment protection”.
Answer:
Slogans on Environment Protection.

1. Grow plants – Get oxygen
2. Avoid plastic bags – Promote cotton bags.

Question 5.
What are the aspects taken as indicators to measure Human Development?
Answer:
Indicators of development:

1. Per capita income
2. Literacy rate
3. Average years of schooling
4. Expected years of schooling
5. Life expectancy at birth
6. Health status
7. Employment status
8. Equal distribution

Question 6.
Create two slogans to prevent Global warming.
Answer:

1. All be nice – Save the ice
2. Global warming – Not charming
3. Protect Mother Earth – It protects all

Question 7.
Identify the importance of the environment in the development of a nation.
Answer:
The development has to be achieved at any cost. Growth in GDP and modern industrial development are necessary, it is argued, for raising the living standards of people and reducing poverty. Since modern industrial and agricultural development are intensive in use of natural resources including energy, depletion of resources and pollution of the environment is to be expected. It is a sacrifice that has to be borne for higher growth. Once high economic growth and prosperity is achieved, pollution and environmental degradation can be handled. One can spend money and clean up the air and rivers, drink bottled water and build cars that are fuel efficient. After all this is the route the developed countries have taken.

Question 8.
Prepare a pamphlet on the importance of ‘Sustainable Development’.
Answer:

Importance of Sustainable Development

The development which meets the needs of the present people without compromising the ability of future generations to meet their own needs is called sustainable development. Better quality of life is necessary not only for us but for the next coming generations also. The present concept of development is not like this.

The present scenario is quite adversary. There is no such feeling of future generations and their needs. All generations have the right on utilizing the natural resources like water, air and soil and so on. If we do not consider this, how the next generations survive that everyone should think of.

To what extent the natural resources we need to that extent only we should use. This concept is to be spread among the people.

Government should take up awareness programmes on this issue. Stringent actions should be initiated against who violate the eco laws and acts. In some areas multinational companies have taken up the lands and pumping out the water and selling them. How does the government give permission to such companies which lead to fall down of ground water level? Government should think about this and take action to make sustainable development a real concept.

Question 9.
Why is it necessary to focus on sustainable development now a days?
Answer:
Focus on sustainable development nowadays is compulsory to meet the needs of the present as well as future generations. We have to provide better quality of life for everyone. Conservation of fertility of soil is also essential for future crops. Factory emissions are to be prevented to make the air and water pure.

Question 10.
Differentiate between the environment’s ‘Source function’ and ‘Sink function’.
Answer:
Differences between the Environment’s source function and Sink function.

Source function	Sink function
1. The sectors of the economy are dependent on natural resources in various degrees.	1. It is (environment) to absorb and render harmless the waste and pollution from various activities.
2. The potential of an environment to provide these resources is referred to as an environment’s source function.	2. Unwanted byproducts of production and consumption say exhaust gases from combustion, water used to clean products, discarded packaging and goods no longer wanted are absorbed by the environment.

Question 11.
How is environmental protection linked with our lifestyle?
Answer:
Our life style is linked with environment protection. We should be habituated to use organic productions. We should avoid plastic. Use renewable energy sources. Reducing quarrying and deforestation to zero. Industrial waste should be disposed in a proper manner. Public transport with compressed Natural Gas is to be encouraged. Radiating devices are to be minimized.

Question 12.
On what does the primary sector depend?
Answer:
In primary sector activities – agriculture, mining, quarrying – and in the manufacturing and energy sector, production is hugely dependent on natural resources. The other sectors of the economy too are dependent on natural resources in various degrees.

Question 13.
What is environment’s source function?
Answer:
The potential of an environment to provide these resources is referred to as an “environment’s source function”. This function is depleted as resources are consumed or pollution contaminates the resources.

Question 14.
What is another function that the environment provides?
Answer:
There is another function that the environment provides. It is to absorb and render harmless the waste and pollution from various activities. Unwanted by-products of production and consumption say exhaust gases from combustion, water used to clean products, discarded packaging and goods no longer wanted are absorbed by the environment. This is as important as the source function.

Question 15.
What does the ‘sink function’ describe?
Answer:
The “sink function” describes an environment’s ability to absorb and render harmless waste and pollution. When waste output exceeds the limit of the sink function, long-term damage to the environment occurs.

Question 16.
What happened in the past fifty years?
Answer:
In the past fifty years of economic development, both these functions of the environment have been overused. This has been said to affect the carrying capacity of the environment, i.e., the capacity of the environment to support economic production and consumption in the future.

Question 17.
What is modern development for people who have been displaced? Why?
Answer:
For people who have been displaced modern development has been unjust and destructive. Because they have lost access to their greater resource, the local environment. Without the local environment, their lives would be reduced to nothing.

Question 18.
How are environmental movements?
Answer:
While each of these movements has slightly different contexts, they are essentially demanding the rights of the local communities over the environment. Chipko movement acted to prevent the cutting of trees and reclaim their traditional forest rights that were threatened by contractors. Narmada Bachao Andolan has stood for the rights of the people over land, forests and river.

Question 19.
What is the impact on the environment that the use of pesticides and chemicals?
Answer:

1. The excessive use of pesticides and chemical fertilizer exhibit a negative impact on society.
2. Environment cannot absorb harmful substances than a limit.
3. When waste output exceeds the limit the sink function limit, danger occurs to the environment.
4. It pressures on environment’s ability to provide different resources for production.

Question 20.
Is it correct to take HDI (Human Development Index) as a measure of development?
Answer:

1. As a measure of development HDI is an improvement over GDP and per capita income.
2. The idea of development hardly limited to production of goods and services.
3. Rapid expansion of production and income coexist with malnutrition and lack of education and health.
4. HDI expands the meaning of development to include social indicators of health and education.

Question 21.
A high % workforce in low-paid employment, an increase in GDP and the enormous variety of goods and services being produced can benefit only a select groups. Read this and interpretate?
Answer:

1. In India 90% of workforce is in the unorganized sector, where the conditions of working are not encouraging at all.
2. Incomes of both self employed and wage workers in unorganized sectors are generally low and at times pitiably so.
3. With, such a high percentage of the workforce is low paid employment, an increase in GDP and the enormous variety of goods and services being produced can benefit only to select groups.

Question 22.
Construction of big dams “leads to environmental problems”. Read this and interpretate.
Answer:

1. They disrupt the lives and livelihoods of lakhs of people.
2. Many people lose their access to local environment.
3. Many people drop from a state of self – sufficiency to scarcity.
4. They were at times made to depend on external forces.
5. Many lose their needs without access to the environment.
6. Rich biodiversity and treasure of knowledge is lost which comes traditionally.

10th Class Social 12th Lesson Sustainable Development with Equity 4 Marks Important Questions and Answers

Question 1.
How does the lifestyle of people influence the environment? What are your suggestions to protect the environment ?
Answer:
Influence:

1. There is a strong bondage between the lifestyle of human kingdom and environment.
2. Environment fulfills many of our needs.
3. There are various ways in which our lifestyles of people influence the environment.
4. The people of a region lives according to their environment. Their traditions, cultures, festivals, etc. are based on their environment.

My Suggestions:

1. Natural resources should be used limitedly.
2. Forests should not be cut down. We should take care of them.
3. Industrial wastes should be recycled.
4. The establishment of industries which release more pollution should be restricted.
5. People should be enriched with the knowledge of environment.

Question 2.
Observe the following Graph diagram.
Write a brief note on the inequality in India based on the graph.
Answer:

1. 3 million households with annual income above Rs. 17 lakh are classified as rich.
2. 31 million households with annual income between Rs. 3.4 to Rs. 17 lakh are classified as middle class.
3. 71 million households income is between Rs. 1.5 to Rs. 3.4 lakh classified as aspirers.
4. 135 million lakhs classified as deprived.
5. In our country, more than 90% of the people are in unorganised sector.
6. It clearly says that the rich are becoming more rich, whereas the poor remain poor.
7. There is inequality in holding wealth as well as opportunities.
8. Wide inequalities in incomes and opportunities across people cannot be the basis for a just society.

Question 3.
Read the text given below and write your opinion.

It is also important to realize that not only do people lose out as they are removed from their local environments, equally, the environment is denuded of Its rich biodlverslty as the traditional knowledge is lost along with the people.

Answer:

The largest of the dams constructed is the Sardar Sarovar, which floods more than 37,000 hectares of forest and agricultural land, displacing more than half a million people and destroying some of India’s most fertile land. The project has devastated human lives and bio-diversity by inundating thousands of acres of forest and agricultural land. A disproportionate number of those being displaced are Adivasi’s and Dalits.

Access to the environment serves a large number of their needs which otherwise they would have to pay for.
As they lose access to environment either because of displacement, or because the environment is destroyed and polluted, the poor are the greatest sufferers. The question of environment and sustainability is intimately connected to the issue of equity.

Question 4.
Write a letter to your district collector on the problems of environment in your area.
Answer:

Anandnagar Colony,
Visakhapatnam,
Date: xxxxxxxxx.

To,
The District Collector,
Visakhapatnam District,
Visakhapatnam.

Respected Sir,

I am Srinivasa Rao, the resident of Gajuwaka. I would like to bring a few lines to your notice about problems of environment in our local area.

In our locality the migrant number is increasing. They are coming to city because of their needs and problems but it leads to new problems here. Water supply, sewage and other waste disposal, transportation and pollution problems are arising. There are plastic covers on the roads everywhere. Many animals on the roads eat those covers and die. As the garbage is increasing and it is not properly cleaned, unbearable stench is spread. There may be a scope for different diseases.

I request you to take proper effective measures wherever polluted industries are there and they should be shut down and minimise polluted plying vehicles and reduce the release of greenhouse gases.

Yours faithfully,
…………………………
…………………………

Question 5.
Study the table given below and answer the questions.
Growth in Extraction of Some Key Minerals in India (in thousand tonnes)

a) What do the particulars of above table tell about?
Answer:
Growth in extraction of some key minerals in India

b) In comparison to other minerals, which one is not being extracted more than double in 2008-09?
Answer:
Coal is not being extracted more than double in 2008 – 09.

c) What might be the reasons for increase in mining?
Answer:

1. Number of industries increased.
2. Using machinery in mining.
3. Consumption of minerals increase.
4. Greed of human beings.

d) What do you think would be the environmental and human costs of such rapid growth in mining?
Answer:

1. Sustainability of minerals
2. Diversion in the direction of river flow
3. Causes for floods.
4. Extinction of forest cover.

Question 6.
Read the following paragraph and write your opinion on it.
We are already experiencing the negative consequences of rapid economic growth on several fronts – the problem of groundwater and pesticides being two stark examples. We have several thousands of communities living off the environment. To destroy the environment means to destroy these communities.

1. The idea of development has been contested through problems of environment.
2. The groundwater levels fell rapidly and groundwater recharge is also not to the expected level.
3. Fertilizers made the soil less fertile and ever increasing costs to farmers.
4. Industrialisation has resulted in a world where natural resources are threatened.

My Opinion: Always we should be able to integrate enviromental concerns with the idea of progress, along with issues of equity and justice. We have to find an environmentally sustainable pathway out of poverty.

Question 7.
Read the paragraph, understand and write your opinion on it.

While industrialisation has brought a lot of material comforts, at least to some, it has resulted in a world where natural resources are threatened and now even the climate is being disrupted. This pattern of growth clearly cannot continue.

Answer:
Opinion on Paragraph :

1. Industrialisation in the world has brought a lot of material comforts for humans to lead a happy life.
2. Man has invented from small pin to big plane with these metals obtained by mining.
3. But at the same time the minerals are reducing in their quantity because man’s short sighted ness.
4. As a result of man’s greediness the natural resources such as metals and fossil fuels are declin-ing and threatening our planet to fell in danger.
5. Because of over use of these resources, climatic changes are going on with the depletion of ozone layer damage and environment degradation.

I conclude that this type of growth does not create sustainable development to the planet and further it becomes unjustifiable in degrading our environment.

Question 8.
How would the rapid extraction of natural resources effect the future development prospects?
Explain.
Answer:

1. Yes, I agree with this statement.
2. We are extracting minerals and natural resources rapidly.
3. Modern industrial development and agricultural development are intensive in use of minerals and natural resources.
4. If this extraction goes on like this, the mineral deposits and natural resources will be depleted.
5. The extent of our current use of minerals and natural resources is such that the chances of future generations to have access to their fair share of scarce resources are endangered.
6. Moreover, the consequences in terms of impacts on the environment may induce serious damages that go beyond the carrying capacity of the environment.

Question 9.
Read the following paragraph and interpret in your own words.

Recent data on the status of groundwater resources in India suggests that the groundwater is under serious threat of overuse in many parts of the country. Nearly one-third of the country is pumping out more groundwater than what goes in as recharge. About 300 districts have reported a water level decline of over 4 meters during the past 20 years, which points to an alarming rate of extraction.

Answer:

1. According to this paragraph the groundwater resources are decreasing as we are overusing it.
2. Maximum of water is pumped out from deep layers.
3. Recharging is less and pumping is more.
4. In future it will become a major problem to all people.
5. The rate of extraction of water is dangerous for our existence.
6. Extraction of groundwater doesn’t affect the particular area where the extraction is going on but it affects all surrounding areas also.
7. The depth of the bore wells is increasing day by day.
8. There should be a change in the human attitude.
9. Our behavior should be environment friendly.
10. We should not over use ground water.
11. Deep wells should be discouraged.
12. Plastic usage should be prohibited.
13. The government should take stringent action against the people who do not follow these conditions.

Question 10.
Read the following paragraph and interpret in your own words.

This pattern of development is in direct contrast to what sustainable development stands for Sustainable development is development that meets the needs of the present without compromising the ability of future generations to meet their own needs. In other words, a better quality of life for everyone-now and for generations to come.

Answer:

1. According to the paragraph given, the development which meets the needs of the present people without compromising the ability of future generations to meet their own needs is called sustainable development.
2. Better quality of life is necessary not only for us but for the next coming generations also. The present concept of development is not like this.
3. The present scenario is quite adversary to the paragraph. There is no such feeling of future
   generations and their needs.
4. All generations have the right on utilizing the natural resources like water, air and soil and so on.
5. The government should take up awareness programmes on this issue.
6. Stringent actions should be initiated against who violate the eco laws and acts.
7. The government should think about this take action to make sustainable development a real concept.

Question 11.
Read the following paragraph and write your opinion.

For most rural communities, the link between the environment and the lives of the people is very strong. Access to the environment serves a large number of their needs (like food, firewood, fodder, economically valuable articles, etc.) which otherwise they would have to pay for. As they lose this access to environment either because of displacement, or the environment is destroyed and polluted, the poor are the greatest losers. The question of environment and sustainability is intimately connected to the issue of equity.

Answer:

1. According to the paragraph given here, the rural people are attached with environment for their food and other commodities.
2. When there is a displacement they don’t have this facility of getting commodities.
3. These poor people suffer a lot when the environment is destroyed and polluted.
4. My opinion on this paragraph is that many a time it is happening in many places.
5. When displacement takes place, the forest dwellers have to face many problems.
6. They don’t have sufficient food and land for cultivation.
7. They don’t get loans as they are new to the money lenders of that place.
8. The government should think about the troubles of these people when they are asked to move from their living places.
9. I am not opposing to construct dams and projects but the displacement should not lead to troubles.
10. Alternate arrangements should be made keeping their problems in mind.

Question 12.
Locate the following points in the Indian map provided.

1. Mumbai
2. Hyderabad
3. Madhya Pradesh
4. Gujarat
5. Tamil Nadu
6. Kerala
7. Punjab
8. Uttar Pradesh
9. River Narmada
10. Sardar Sarovar Project
11. Andhra Pradesh
12. Delhi.

Answer: