TS 6th Class Science Important Questions 5th Lesson Materials and Things

These TS 6th Class Science Important Questions 5th Lesson Materials and Things will help the students to improve their time and approach.

TS 6th Class Science Important Questions 5th Lesson Materials and Things

Question 1.
List out some of the objects from your house which would break and would not broke?
Answer:
Objects that would break : Cup, glass, earthern pots, mirror, plastic chair etc.,
Objects that would not break : Stainless steel glass, steel, plate, iron chair,door, cylinder, cooking vessel etc.

Question 2.
Based on light penetration through the material how many types of materials are there? Give examples for each type that are used in our daily life. (Or) Give examples for
a. Transparent
b. Opaque
c. Translucent
Answer:
a. Transparent: The material through which we can easily see the objects are said to be transparent.
Eg : Glass, water, polythene paper.

b. Opaque: The material through which we cannot see the objects are said to be opaque.
Eg: Wood, steel, card board.

c. Translucent: The material through which we can see the objects but not very clearly are said to be translucent.
Eg : Oil paper, tracing paper.

Question 3.
What are soluble and Insoluble substances? Give examples.
Answer:
a. Soluble substances : Certain materials dissolve when mixed with water.
These are said to be soluble substances. Eg: Sugar, salt etc.

b. Insoluble substances : The materials that do not dissolve in water are said to be insoluble substances. Eg: Coconut oil, kerosene etc.

Question 4.
Give four examples each for the substances which sink and float on water.
Answer:
Substances that sink in water : Stone, iron, nail
Substances that float on water : Wood, plastic etc.

Question 5.
Mention any two materials which can dissolve in water.
Answer:
Salt, sugar, chalk powder etc.

Question 6.
Explain solid, liquid and gaseous states with examples.
Answer:

• Solids : Those materials which do not change shape are called solids. Eg: Wood, rock, brick etc.
• Liquids : The materials which change shape are called liquids. Eg : Water, oil, kerosene etc.
• Gases: The materials which change shape and volume are called gases. Eg: Air

Question 7.
List out the following things as transparent, opaque and translucent materials.
(wood, oily paper, glass, steel mirror, plastic)
Answer:

Transparent	Opaque	Translucent
Glass	Wood Steel mirror Plastic	Oily paper

Question 8.
(Water, gold, kerosene, diamond, petrol, alcohol, wood, iron)
Classify the above substances basing on the state of matter.
Answer:
Solids : Gold, diamond, wood, iron
Liquids : Water, kerosene, petrol, alcohol

Question 9.
Write the difference between transparent substances and opaque substances. Give suitable examples for both.
Answer:

Transparent substance	Opaque substance
The substance through which we can see is transparent substance. Eg: Glass, polythene cover etc.	The substance through which we cannot see is opaque substance. Eg: Stone, book, wall

Question 10.
Classify the following objects into transparent and opaque.
Glass, plate, book, iron scale, car mirror, steel plate, spectacles, wooden piece.
Answer:
Transparent substances : Glass, spectacles.
Opaque substances: Plate, book, iron scale, car mirror, steel plate, wooden piece.

Question 11.
What are the things made by wood in your home ? Mention their usage.
Answer:
Things made up of wood:

• Chair, door, windows, table etc.
• Chairs are used for sitting.
• Table is used for keeping books and things, windows and doors are used for ventilation and protecting houses.

Question 12.
Can you make a cricket ball with mud or glass?
Answer:
We cannot make a cricket ball with mud or glass because cricket ball is made up of hard and strong material that withstand hard hitting shots. Mud loses soil particles. It can become much hard even though it is dried. Glass easily breaks.

Question 13.
Why do some substances float on the water and some sink in the water? Give example.
Answer:
Substances which have lesser densities compared to the density of water float on water.
Eg: Wood, cork, plastic etc.
Substances which are more denser than water sink in water.
Eg: iron, stone etc.

Question 14.
Deepika made the tomato sink in water, which actually floats on the surface. Imagine how it became possible to her.
Answer:
Deepika made the tomato more denser than its original density. She might have attached another object to tomato to increase its weight and density. Therefore tomato sinks in the water.

Question 15.
List out some Important things from your home. Ask your parents or friends from which material each object may possibly be made of and tabulate them.
Answer:
Aim of the project : To list out the things from my home and the materials with which they are made of.

S.No.	Object	Material
1.	Door	Wood, metal, rubber, paint
2.	Towel	Cotton thread
3.	Bicycle	Iron (metal), plastic fibres, paint
4.	Knife	Steel (metal), wooden handle
5.	Mirror	Glass, plastic frame, paint
6.	Shoes	Leather or synthetic material
7.	Water bottle	Plastic fibre, colour paints
8.	Pot	Clay

Question 16.
Name as many things/objects as you can make using the materials given below and tabulate them.
1. Metal
2. Plastic
3. Glass
4. Wood
5. Cotton
6. Leather
7. Ceramic
8. Rock
Answer:

S.No.	Material	Things / Objects
1.	Metal	Utensils, tools, cupboards, chairs etc.
2.	Plastic	Bags, jars, chairs, boxes, dolls etc.
3.	Glass	Mirrors, windows, spectacles, kitchen items etc.
4.	Wood	Table, chair, windows, door, cots etc.
5.	Cotton	Cloth, ropes, screens etc.
6.	Leather	Shoes, hand bags, coats, purse etc.
7.	Ceramic	Cup, plates, saucers, jars, pots etc.
8.	Rock	Idols, grinders, rollers, replicas etc.

Question 17.
Prepare a list of objects around you and find which of them are transparent and which are opaque. Write them in table.
Answer:
I listed out the following objects from our surroundings. They are :

• Glass jar
• Steel glass
• Water with glass bottle
• Exam pad
• Wood
• Note book
• Polythene cover.

Question 18.
Ask your friends about the names of some objects. List out them.
Classify them into solids, liquids and gases. Make the table.
Answer:
Collected objects : Stone, milk, smoke, water, oil, chalk piece, pen box, cool drink, seeds, kerosene, air in the balloon, book, lemon juice, cv linier gas. white fumes of candle.

S.No.	Objects	Transparent or Opaque
1.	Glass jar	Transparent
2.	Steel glass	Opaque
3.	Water with glass bottle	Transparent
4.	Exam pad	Opaque
5.	Wood	Opaque
6.	Note book	Opaque
7.	Polythene cover	Transparent

Question 18.
Ask your friends about the names of some objects. List out them. Classify them into solids, liquids and gases. Make the table.
Answer:
Collected objects : Stone, milk, smoke, water, oil, chalk piece, pen box, cool drink, seeds, kerosene, air in the balloon, book, lemon juice, cylinder gas, white fumes of candle.

S.No.	Solids	Liquids	Gases
1.	Stone	Milk	Smoke
2.	Check piece	Water	Air in the balloon
3.	Pen	Oil	Cylinder gas
4.	Box	Cool drink	Fumes of candle
5.	Seeds	Kerosene
6.	Book	Lemon juice

Question 19.
Read the following items. Predict which of them sink or float in water.
Then try to test whether your predictions are correct or wrong by dropping them in a beaker of water. Find and record your observation.
1. tomato
2. brinjal
3. potato
4. iron nail
5. sponge
6. wood
7. stone
8. leaf
9. chalk piece
10. paper.
Answer:
Aim :- To test the given items whether they float or sink in the water.
Procedure :-

Prediction	Object
Sinks Floats	Iron nail, wood, stone, chalk piece Tomato, brinjal, potato, sponge, leaf, paper.

S.no	Object	Prediction	Finding
1.	Tomato	Floats	Floats on the water surface
2.	Brinjal	Floats	Floats
3.	Potato	Floats	Sinks in the water
4.	Iron nail	Sinks	Sinks in the water
5.	Sponge	Floats	At first it floats, after absorbing water it sinks
6.	Wood	Sinks	Floats on the water
7.	Stone	Sinks	Sinks in the water
8.	Leaf	Floats	Floats on the water
9.	Chalk piece	Sinks	Sinks in the water
10.	Paper	Floats	Floats

Question 20
Observe the solubility of the following substances.
Do the experiment. Tabulate the results.
a. sugar
b. salt
c. sand
d. saw dust.
Answer:
Aim :- To observe the solubility of the given substances.
Requirements :- Four glasses full of water, sugar, salt, sand, sawdust.

Procedure :-

• I brought four small glasses and placed them on the table. They are filled with fresh water.
• Then I took small quantities of sugar, salt, sand and saw dust. They are added to the four glasses respectively.
• They are kept on the table undisturbed for half an hour.

Observation :- is observed that all the materials in four glasses are not completely soluble in water. The observations are given below.

S.No.	Material added	Dissolves (Yes/No)
1.	Sugar	Yes
2.	Salt	Yes
3.	Sand	No
4.	Saw dust	No

Question 21.
Write down what do you observe in the activity on ‘soluble or insoluble in water’ using the following objects in your school laboratory?
Answer:

a. Sugar added to water	Soluble
b. Sand added to water	Insoluble
c. Saw dust added to water	Insoluble
d. Chalk powder added to water	Soluble
e. Kerosene added to water	Insoluble
f. Lemon juice added to water	Soluble
g. Salt added to water	Soluble
h. Oil added to water	Insoluble

Question 22.
Sugar, salt, saw dust, sand, sponge, iron nail etc.
In the above list we observe that certain materials are soluble or insoubIe, float or sink in water.
Now answer the following questions

i. Which materials are insoluble?
Answer: Saw dust, sponge, iron nail

ii. Which materials are soluble in water?
Answer: Sugar, salt

iii. What happens when sponge and saw dust are kept in water?
Answer: Sponge and saw dust absorbs and water slowly sink.

iv. Give examples to materials which sink in water.
Answer: Stone, iron nail

Question 23.
Describe the experiment that you conducted for knowing semi transparency.
Answer:

• A sheet of white paper is taken.
• A trial is made to see a lighted bulb through it. But nothing is seen.
• Then a few drops of oil is poured on that sheet.
• Once again the trial is made to see the lighted bulb through oil applied paper.
• Bulb is seen through the oil paper, but not very clearly.
• These substances are called translucent substances.

Question 24.
Write your observations you made by doing the following activities.

• Mix chalk powder in water.
• Place a piece of candle in water.
• Add some oil drops to a beaker or water.
• Drop an egg in a beaker of salt water.

Answer:
It is observed that all the materials are not completely soluble.

Question 25.
Observe your surroundings. Classify the solids, liquids and gases. Write in a tabular form.
Answer:

S.No.	Objects	Transparent or Opaque
1.	Glass jar	Transparent
2.	Steel glass	Opaque
3.	Water with glass bottle	Transparent
4.	Exam pad	Opaque
5.	Wood	Opaque
6.	Note book	Opaque
7.	Polythene cover	Transparent

Question 26.
Observe the table and write answers to given below questions.
Answer:

Object	Materials required for preparation
Door Cycle Knife Mirror	Wood, Paint, Metal, Rubber Iron, Rubber, Paint Iron, Wood Wood, Glass, Metal, Paint

Now answer the following questions.
i. What objects require paint?
Answer: Door, cycle, mirror

ii. Mention two objects which are made by same material.
Answer: Door, mirror, knife etc.

iii. Choose any one object mentioned in the given table and write necessary materials used for them.
Answer: Cycle requires iron, rubber and plastic.

iv. In the given table wherever we mentioned the name metal, write what type of metal it is.
Answer: Aluminium or non rusting materials.

Question 27.
Answer the following questions.

S. No.	Item	Sinks in water	Floats in water
1.	Plastic toy	–	✓
2.	Iron nail	–	–
3.	Wood	–	–
4.	Stone	✓	–

i. Why do plastic toy and wood float on water?
Answer:
The density of toy and wood are less than that of water. That is why they float on water.

ii. Some items float on water even though they have weight. How is it possible?
Answer:
Even though the objects are heavy weight, the depth of water body and density of water make the objects float on water surface.

Question 28.

S.No	Objects	Transparent/opaque
1	Glass jar	Transparent
2	Wooden door	Opaque
3	Steel plate	Opaque
4	Polyethene bag	Transparent

Read the above table and answer the following questions.

i. What type of object is glass jar?
Answer: Transparent substance

ii. Is polyethene cover not transparent? What is transparency?
Answer:
Polythene cover is a transparent substance. The ability of a substance through which we can see objects is called transparency.

iii. Give example to opaque object.
Answer:
Steel plate, rod, rock, book etc.

iv. Give example to translucent object.
Answer:
Oil paper, window glass etc.

Question 29.
Observe the following table and answer the questions.

Sl.No.	Materials	Things
1.	Plastic	Bags, Chairs
2.	Metal	Utensils and Bowls
3.	Wood	Door, Table
4.	Glass	Mirror, Glasses
5.	Skin	Shoe and Purse

i. Which substances are used to prepare utensils and bowls?
Answer: Metal

ii. What are the things that are prepared by plastic?
Answer: Bags, chairs

iii. Which substances are used in manufacturing mirror?
Answer: Glass

iv. What are the things made of wood?
Answer: Door, table etc.

Question 30.
Analyse the following information and answer the questions.

S.No	Objects	Material
1	Towel	Cotton, dye
2	Door	Wood, metal, rubber, paint
3	Bicycle	Steel, rubber, iron
4	Water bottle	Plastic or glass
5	Pot	Clay

i. Which objects are made of one material?
Answer: Pot

ii. What materials are used for making bicycle?
Answer: Steel, rubber, iron etc

iii. Which objects are made of meire than one material?
Answer: Door, bicycle, towel

iv. Identify the natural materials in the given table.
Answer: Clay, Cotton, dye

Question 31.
Study the table given and answer the questions.

S.No	Objects	Material
1.	Window	Wood, Metal
2.	Sofa	Wood, Foam, Rexin
3.	Pot	Clay
4.	Chair	Wood, Metal
5.	Water bottle	Plastic
6.	Knife	Metal, Plastic
7.	Cricket bat	Wood, Rubber
8.	Shoes	Leather

i. Which object is made from foam and rexin ?
Answer: Sofa

ii. Name the objects where wood is used.
Answer: Window, chair, cricket bat

iii. Which material is used for cricket bat ?
Answer: Wood, rubber

iv. Mention the objects prepared using leather.
Answer: Shoes

Question 32.

According to the above diagram it is concluded that the candle caught the fire even keeping the match stick away from it. But the match stick is placed above the extinguished candle. Give your reason. Explain.
Answer:

• There is a white smoke column rising from the wick of the candle as soon as we extinguish the flame.
• If we bring the burning match stick close to that smoke the wick burns.
• Because the smoke is nothing but the vaporous form of the candle material.
• It enables the wick to burn. The white fumes coming from the wick, help in burning the wick immediately.

Question 33.
Plastic bags are dangerous for life. Write consequences that occur due to over usage of plastic.
Answer:

• Plastic pollution affects animals and man.
• When plastic bags are burnt they release toxic gases into the air.
• Once plastic bags become bitter they find their way into water bodies, fertile soil, parks, fields etc.
• The decomposition or degradation of plastic takes about 400 years.
• Thus everyone should think to minimise using plastic bags.