TS 10th Class Biology Study Material 10th Lesson Natural Resources

Telangana SCERT 10th Class Biology Study Material Telangana 10th Lesson Natural Resources Textbook Questions and Answers.

TS 10th Class Biology 10th Lesson Questions and Answers Telangana – Natural Resources

Question 1.
The BP statistical Review of World Energy in June measured total global oil at 188.8 million tonnes, from proved oil resources at the end of 2010. This is only enough for oil to last for the next 46.2 years. What measures should be taken to conserve oil? What will happen if we do not conserve it.
Answer:
Fossil fuels were produced from the remains of ancient plants and animals. They include coal, petroleum (oil) and natural gas. Apart from its use in vehicles, many of the products we use today are made from petroleum. We need to conserve fossil fuels so we don’t run out of them.

  • Everyone can help conserve fossil fuels by using them carefully.
  • Turn of lights and electronics when you are not using them.
  • Purchase energy – efficient appliances. Prefer ‘ISI’ mark utensils / appliances.
  • Walk, ride a bicycle and use public transportation whenever possible.
  • It is better to prefer public transport system like bus or train instead of travel in personal vehicles
  • Going together by using one vehicle of work place.

It is estimated that the available supply of fossil fuels their supply gets exhausted in another 42- years. in such a case, all the industries and transport vehicles, which use fuels cannot be run once the fuel supply is exhausted. Hence, indiscriminate use of these fuels should be avoided.

TS 10th Class Biology Study Material 10th Lesson Natural Resources

Question 2.
Here is a news strip, read it carefully and answer the following questions Villagers oppose sand mining project Santhabommali (Srikakularn): People of more than 20 villages in two mandals of Srikakulam have raised a banner of revolt against the proposed beach sand mining project by a private company and threatened to intensify their agitation if the government does not cancel the project. The sand mining is being taken up to extract rich minerals from the
area. The villages are located around the forest belt were mining was initiated.
i. Do you think the villagers are doing a right thing to agitate? Why?
ii. What resources are the villagers trying to save by their agitation?
iii. Will the villagers be benefitted by the rich minerals extracted from sand?
iv. Why does the private company want to carry out mining in the beach area?
v. What is the role of the government in this aspect?
vi. How will mining in that piece of land affect people of the area?
Answer:
Village oppose sand mining project Santhabomn all (Srikakulam): People of more than 20 villages in two mandals of Srikakulam have raised a banner of revolt against the proposed beach sand mining project by a private company and threatened to intensify their agitation if the government does not cancel the project. The sand mining is being taken up to extract rich minerals from the area. The villages are located around the forest belt were mining was initiated.

i. Do you think the villagers are doing a right thing to agitate ? Why?
Answer:
Yes, the villagers are doing a right thing to agitate. Because beach sand mining leads to certain problems such as:

  • Destruction of natural beaches and the ecosýstemS.
  • Habitat loss for globally important species such as turtles, shore birds, etc.
  • Destruction of nearshore marine ecosystems.
  • Increased shoreline erosion rates.
  • Reduced protection from storms, tsunamis and wave events.
  • Economic losses through tourist abandonment
  • Loss of coastal aesthetics and
  • Increased saline water intrusion.

The threats posed by sand mining are made even more critical given the prospect of a significant rise in global sea level over the coming decades.

ii. What resources are the villagers trying to save by their agitation?
Answer:
By agitating the villagers can save valuable mineral called Titanium / Zirconium found exclusively in costal belt spread from Nellore to Srikakulam district covering a distance of about 972 Km.

iii. Will the villagers be benefitted by the rich minerals extracted from sand?
Answer:
No, the villagers will not be benefited by the rich minerals extracted from sand.

TS 10th Class Biology Study Material 10th Lesson Natural Resources

iv. Why does the private company want to carry out mining in the beach area?
Answer:
Private company wants to carry out mining in the beach area for their benefits, they want to earn money.

v. What is the role of the government in this aspect?
Answer:
The government has to take action against the private people if they start mining, which harm people or if government give permission and control the process where it should not effect the people.

vi. How will mining in that piece of land affect people of the area?
Answer:
Mining causes air pollution which leads to the diseases of respiratory system like lung cancer, Asthma, etc

Question 3.
What is sustainable development? How is it useful in natural resource management?
Answer:
When we use the environment in ways that ensure we have resources for the future, it is called sustainable development. Development and conservation can co-exist in harmony. The earth’s natural resources include air, water, soil, minerals, fuels, plants and animals. AH the things we need to survive such as food, water, air and shelter.

Conservation is the practice of caring for these resources to all living things can benefit from them now and in the future. The development meet the needs of the present without compromising the ability of future generation to meet their own needs.

Question 4.
Write a detailed note on management of a natural resource.
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 riseto imbalance in another (By Srimathi Indira Gandhi, while launching the world conservation strategy in India on 6th March 1980.)

Small steps could become great efforts at conservation. Protection of the environment:

  • Soil, water, air, animals, birds, plants and trees are not anybody’s property.
  • That is the collective property bestowed on us by nature. We use the natural resources to produce many things. Some of them are our own, while others are public property.
  • Village – tanks, ponds, vegetable markets, bus stands, railway stations, temples, schools and colleges are public property and are used by aH.
  • Everyone should join hands to protect them. It’s not a single individual’s jobs.
  • Only when we collectively take up the tasks like growing trees besides roads, providing drainage or keeping the surroundings of the public tap in our colony clean we can be successfully.
  • This is a collective responsibility. – Protection of the natural resources is possible only if all of us join hands together.

TS 10th Class Biology Study Material 10th Lesson Natural Resources

Question 5.
Suggest some ways of reusing a resource in your locality?
Answer:

  • If a fine soft coarse of blanket is to cover open springs to save wear of springs on sheets and mattress.
  • Bottle cap as dent patcher in a wooden table. Put a metal bottle cap over the dent with the fluted edge facing upward towards the table, press the centre of the capightly with the tip of a hot iron.
  • Buttons : If you have only two attractive buttons make them into a pair of earrings. If you have 4 attractive buttons make them into a pair of cufflinks, chain stitch
  • Candle stubs: For corking bottles when you lost the cork soften a candle stub that it fits the neck of the bottle.
    A candle stub also make excellent fire starters. Candle stub can be saved and melted together and make into new candles.
  • The used bangles which are thrown a side can be used as a pen stand by sticking them one on the other.
  • Paper, a product of many trees can be put reuse after proper use. If it is done properly, definitely their practice would save many plants from extinctions. Thus reduce the effect of CO2 on the earth.

Question 6.
Why should we conserve forests and wild life?
Answer:
Wildlife and forests should be conserve for the following reasons.

  • Wildlife and forests are the measures of Biodiversity of a particular legion. By conserving the wildlife and forests, we are ensuring that all diverse species in an area survive, breed and flourish.
  • Conservation of forests and wildlife is vital for the ecological stability of particular area.
  • Forests are the habilitate for the wildlife and they are an important constitute of the various food chains and food webs. Forests are needed for smooth functioning of Biochemical cycles.
  • Forests are necessary for the formation of human and for maintaining soil fertility.
  • Forest pure air protect the earth from green house effect by removing carbon dioxide and converting it into oxygen. Thus forests protecting us from harmfully effects of global warming.
  • Many fruits, medicines, dyes, sandle wood and bamboo is obtained from forest by local people.
  • Forest provide employment large number of people and also help in generating revenue.

Question 7.
Suggest some approaches towards the conservation of forests.
Answer:
Basic steps to save forests :

  • Trees: It’s a concept originally devised from elementary school audience but serves well as set of principles for saving rain forests and on a broader scale, ecosystems around the world.
  • Teach, others about the importance of the environment and how they can help to save forests.
  • Restore: Restore damaged ecosystems by planting trees, where forests have been cut down.
  • Encourage: People to live in away that doesn’t hurt the environment.
  • Establish parks : To protect forests and wild life parks should be established.
  • Support : Companies that operate in ways that minimize damage to the environment.

Question 8.
Natural resources are decreased more rapidly. Guess what will be the consequences?
Answer:
The problem arising the exploitation of natural resources are the following.

  • Natural resources like soil, water, air, forest, animals, minerals are declining at a rapid pace due to indiscriminate use.
  • Deforestation leads to desertiflcation. downfall of rain, soil erosion, extinction of species.
  • Air, water, soil pollutions leads ozone depletion Greenhouse effect.
  • Soil also very precious natural resources if farmer want good yeild, they need healthy soil. If the activities of human continues with no time total soil become barren.
  • Water is also very valuable resource only 3% water on earth available for our utility. If water pollution goes on like this. Availability of portable water very little for us.
  • If human activities are not proper there lot scope for natural calamities like earthquakes, tsunami, floods will occurs. This lead perish of human race on the earth.

Question 9.
Prepare a questionnaire to conduct an interview at a petrol filling station personnel about consumption of fossil fuels?
Answer:
Questionnaire:

  • What is the storage capacity of petrol filling station?
  • How much petrol is consuming per day?
  • From where the petrol is importing?
  • Is the consumption of petrol increasing or decreasing?
  • What are the chemicals present in it?
  • How can a person save petrol?
  • What is the alteriïate source for petrol if it is exhausted?
  • What is the rate of importing petrol?

TS 10th Class Biology Study Material 10th Lesson Natural Resources

Question 10.
Prepare model for rain water harvesting/energy saving/soil management, reflecting your innovative thoughts.
Answer:
TS 10th Class Biology Study Material 10th Lesson Natural Resources 1

Procedure to prepare a model for rain water harvesting:

  • Make a model of a house with roof little slanting towards one side.
  • Connect a tube/pipe to the down end such that the rain water that falls on roof can be collected.
  • Connect the other end of this tube to a barrel like structure which can be used as storage tank.
  • From the tank arrange a tube towards the garden along with a valve that can be closed and opened.
  • Arrange one more tube with valve into a recharge pit or percolation pit arranged at one corner.
  • Arrange a tap to the tank that can be opened to collect the water for cleaning floor, vehicles, etc.
  • During rain, water from roof can be collected into tank and we can utilize it later for gardening or cleaning purposes.
  • When water is in excess it can be used to recharge underground water.

Question 11.
List out names of villages farmers and procedure followed for restoration of any natural resource in your area.
Answer:

Village Name Farmer’s Name Procedure followed to restoration of natural resources
Chilkoor Ch. Ramaiah Constructed recharge pits to restore underground water.
Siddipet Seethaiah Constructed check dams to restore underground water.
Mangollu T. Ranganadh Recharged the well by building dykes in thenalla.
Miryalaguda R. Sundararn Motivated the villagers to construct percolation pits.
Uppal D. Raja Reddy Removed silt from the tank.

TS 10th Class Biology Study Material 10th Lesson Natural Resources

Question 12.
You might have heard the Natural Gas drillings near Kakinada by ONGC(Oil and Natural Gas Corporation). Collect information and prepare a note on the status of Gas production at the basin.
Answer:

  • Presently ONGC producing gas at the rate of 3.05 MMM3/day to 4.0 MMM3/day.
  • ONGC, GSPC, Reliance industries are companies exploring oil and natural gas in this region.
  • GAIL is marketing and distributing the natural gas through gas collection stations.
  • ONGC has established mini oil refinery at Tatipaka.
  • ONGC is associated with GAIL in planning the additional facilities and technical inputs needed for the future enhanced gas supplies.
  • Total allocation of natural gas from KG. area is 8.5 MMM3/day.
  • ONGC has already projected a production potential of 6.5 MMM3/day of gas availability of which entire quantity has been allocated to the industrial consumers of that area.
  • 16 Industries are actively using Natural gas investing Rs. 5500 crores are working well for power generation, steel re-rolling, producing fertilizers etc., and some power projects are almost invested Rs. 4000 crores and waiting for supply of Natural gas.

Question 13.
Does your village or nearest city has a recycling unit of waste materials? Write in detail the steps involved in it.
Answer:
Near to our village there is a center that recycles the paper waste. Here the waste paper is recycled in the following way.

  • Waste paper is collected from various sources.
  • This paper is taken to the recycling plant where it is separated into types and grades.
  • The separated paper is then washed with soapy water to remove inks, plastic film, staples and glue.
  • The paper is put into a large holder where It is mixed with water to create slurry.
  • By adding different materials to the slurry different paper products can be created, such as cardboard, newsprints or office paper.
  • The slurry is spread using large rollers into large thin sheets.
  • The paper is left to dry.
  • Then it is rolled up, ready to be cut and sent back to the shops.

Plastic Recycling process:

Stage – 1: Plastic needs to collected by the recycling company. Once plastic arise, recycling plant he first stage is to sort the plastic into specific types because plastic recycling is more complex than of other metals like glass or paper. Due to many different types of plastic, more importantly mixed plastic cannot be used in manufacturing without delivering poor quality products. Heñce why plastic recycling companies need to be through when it comes to sorting the waste plastic into the definite forms.

Stage – 2: Once the waste plastic is identified and separated, the cleaning process will begin, this usually starts with washing to remove paper labels, adhesives and other impurities to be completely removed as this lowers the quality of the recyclic plastic.

Stage – 3: The shredding stage is when the plastic is taken and loaded on to conveyor belts or directly into huge hoppers that funnel the clean scrap towards rotating metal teeth that rip the plastic into small pellets which are bagged up and ready for testing.

Stage – 4 : Identify and classify the plastic: Once the shredded plastic has been hagged it is then chemically tested and labelled as to its exact specification, this grade plastic can be used as is by adding to a mix of vergin plastic in a manufacturing run, alternatively the grade plastic can be further recycled.

Stage – 5 : Exturding: This is the final stage in recycling plastic. This involves cleaning and melting, shredded plastic and extruding the form of pellets which then go on to manufacture the next lot of plastic products.

Reasons to recyclic plastic: Millions of tons of a waste plastic end up in land fill, when the vast majority of it can be recycled, it’s all too easy to throw away rubbish without a second thought, but we need to take care of our planet and not just reducing the amount of rubbish we bury but also given that plastic is derived from oil, a natural product with ever depleting resource it makes sense to recycling as much as possible.

TS 10th Class Biology Study Material 10th Lesson Natural Resources

Question 14.
Collect any graph that shows oil (petroleum) consumption in India.
i. Does the production meet consumption in India?
ii. During which period of time shows highest increase in consumption rate?
iii. What change have you observed in the production from past ten years, for example 2006-2016?
iv. Suggest some ways to bring down consumption of petroleum.
Answer:
TS 10th Class Biology Study Material 10th Lesson Natural Resources 2

i. No, the production does not meet consumption of India.
ii. During 2008 to 2016 the consumption rate is highest.
iii. Running rate of vehicles is increasing enormously due to increase in population but the production is not increasing as per the consumption.
iv. Everyone can help conserve fossil fuels by using them carefully.

  • Turn off lights and other electronics, when we are not using them.
  • Purchase energy-efficient appliances.
  • Walk, ride a bicycle and use public transport whenever possible.
  • It is better to prefer public transport system like bus or train instead of travelled in personal vehicles.
  • Minimise fuel wasted in idling.
  • Practice eco-friendly methods.
  • Don’t use car when you are travelling alone.

Question 15.
Proper utilisation of natural resources is the way to show gratitude to our nation. Can you support this statement? Give your argument.

Question 16.
Crop selection and cultivation should be based on availability of water. Prepare a slogan to bring awareness among farmers about this?

TS 10th Class Biology 10th Lesson Natural Resources Intext Questions

1 Mark Question and Answers :

Question 1.
If water resource becomes scarce, will it affect the nature of soil in an area?
Answer:
Yes, it will also affect the nature of the soil in an area.

Question 2.
As wells dry up, how are people In the area dependent on the well affected?
Answer:
Open wells have dried up, water tables have gone down.

TS 10th Class Biology Study Material 10th Lesson Natural Resources

Question 3.
Why do you think water became scarce mainly in Vaddicherla?
Answer:
Water is pumped out of wells and bore wells using electricity leads to water scarcity.

Question 4.
What could have saved water in Vaddicherla?
Answer:
Following the Micro – Irrigation and developing the ground water succees could have saved water in VaddicherlAnswer:

Question 5.
A well irrigates more area in Kharlf season as compared to Rabi, how Is it possible?
Answer:
A well irrigates more area in Kharif season as compared to Rabi because Kharif occurs in rainy season and Rabi in winter season. So well irrigation is more in Kharif season.

Question 6.
How should a farmer utilize such a condition?
Answer:
Farmer wants to irrigate more land in Kharif season to grow more crop to get more yield.

Question 7.
How can wells be recharged?
Answer:

  • Wells can be recharged by constructing the soak pits.
  • Soak pits trap rain water optimally and helps in recharging the dried up wells.

2 Mark Question and Answers :

Question 1.
How would recharging dried up wells help farmers of Vaddicherla?
Answer:

  • Recharging dried up wells helps to increase the availability of water.
  • Cost involved in irrigation will decrease.
  • Production will increase.
  • As a result, the farmers of Vaddicherla will get into net income.

Question 2.
What does the case tell us about a water resource and its effect on farmers?
Answer:

  • This case tell us that the water resource is very crucial for farmers.
  • If they don’t utilise these resources in a proper way. they may not get this in sucientquantit
  • This condition leads to less productivity and more investment.
  • So the farmer will gét the losses or less benefited.
  • So this resource should be properly used and conserved.

TS 10th Class Biology Study Material 10th Lesson Natural Resources

Question 3.
Why were farmers at Wanaparthy at a better state than those at Vaddicherla?
Answer:
Farmers at Wanaparthy are at better state than those at Vaddicherla because

  • They conserve the water by converting a existing tank into percolation tank. As a result, water situation is much better than Vaddicherla.
  • Dug wells were converted into bore wells to reduce loss of water by surface evaporation.
  • By selecting dry land crops using Jess water expenditure on irrigation was reduced.

Question 4.
How did farmers of Vaddicherla and Wanaparthy recharge their ground water resources?
Answer:

  • The farmers of Vaddicherla and Wanaparthy recharged their ground water resources by constructing soak pits.
  • Soak pits stores rain water optimally.
  • It helps in recharging dried up bore wells.

Question 5.
What ways of restoration of a resource does the Kothapaily case tell us about?
Answer:
The Kothapally case tells us about the following ways of restoration of a resource:

  • Construction of water storage structures.
  • Percolation pits.
  • Contour field bunding.
  • Recharge of wells by building dykes or barriers in the nalla.
  • Plantation in waste lands.
  • Adapting micro-irrigation techniques.

Question 6.
What are some common means of restoration and conservation of water resource that we came across in the cases studied so far?
Answer:
The common means of restoration and conservation of water resource that we come across in the cases studied are:

  • Percolation pits
  • Micro-irrigation techniques
  • Soak pits.

Question 7.
How do you think we will meet our requirements in future?
Answer:
We have to meet our requirements in future by

  • Desalinating the sea water.
  • Restoring of ground water by recharging with rain water.
  • Getting co-operation from the neighbouring states.
  • Conserving water now for future.

Question 8.
We would have to depend upon other states or perhaps other countries for water. Do you agree ? Why/Why not?
Answer:
Yes, I agree with this statement. Because.

  • If water not observed today, a situation may arise where we have to depend upon other states or perhaps other countries as well.
  • But mostly condition of all the states òr countries may be more or less similar at a point of time.
  • So mutual co-operation regarding water may be needed.

TS 10th Class Biology Study Material 10th Lesson Natural Resources

Question 9.
Could the amount of water used for irrigation in our state be reduced ? How?
Answer:

  • The amount of water used for irrigation in our state can be reduced.
  • For this, micro-irrigation techniques such 35 drip irrigation, sprinkler irrigation should be adapted.
  • Seed based irrigation should be done.
  • Crops that require less water should be grown.

Question 10.
Does cropping pattern have any role to play in reduction of water utilisation?
Answer:

  • Cropping pattern also had a key role to play in reduction of water utilisation.
  • Using alternative crops. one using more water and second one using less water can conserve water some extent.
  • Dry Land crops should be grown when there is no proper availability of water.
  • Usage of less water harvesting system like drip irrigation and sprinklers.
  • Cultivation of commercial crops.

Question 11.
Do you think one needs laws for distribution of water and its use ? Why/Why not?
Answer:

  • Yes, laws are need for distribution of water and its use.
  • Otherwise all the people may not have self discipline to conserve water.
  • As water is a key resource for life, competition may arise between people or states or countries.
  • Laws help to control this kind of dispute and use it judiciously.

Question 12.
How much percent of area do you think is irrigated by other sources of water?
Answer:

  • Inspite of some major rivers like Godavari and Krishna, the major source of irrigation is ground water.
  • In our state 43% of area under irrigation is through ground water.
  • 37%, 15% and 5% of area under irrigation are getting water through canals, tanks and other sources respectively.

Question 13.
Why do the rivers fail to benefit the state to an extent they should have?
Answer:
Rivers fail to benefit the state to an extent they should have. Because

  • There are no sufficient structures (dams) to store river water.
  • Over usage of water by the other states.
  • Geographically our rivers are flowing through the rocky and hill areas in most of the places in our state where it is difficult to make canals.
  • Government should plan for proper utilization of river water after scientific study with the help of expert engineers.

Question 14.
Since ground water resources are getting depleted at a fast pace. What are the alternatives?
Answer:
Since ground water resources are getting depleted at a fast pace, the alternatives are:

  • Tanks should be constructed to harvest rain water.
  • Projects should be constructed across the rivers.
  • Water stored in projects or dams should be channelised to the agricultural lands through canals.

TS 10th Class Biology Study Material 10th Lesson Natural Resources

Question 15.
How should states and countries work to provide enough for all?
Answer:
States and countries can work to provide enough water for all by,

  • Making some strict laws for distribution of water and its use.
  • Every state or country should obey and follow these laws very strictly.
  • There should be some autonomous body to look after the agreements and disputes between the states or countries.
  • There should be co-operation for water between the states or countries to provide enough water for all.

Question 16.
What would you do to motivate others to manage an important resource in your locality?
Answer:
To motivate others manage an important resource in my locality I will do the following activities:

  • I will explain the importance of resource and need for its proper management.
  • I will conduct the seminars on this issue.
  • With the help of my friends and teachers i will conduct some competitions like debet, essay writing, etc., on this issue.
  • I will plan some cultural activities such as songs, skits that explain the importance of managing the resource and exhibit them in the school and the village to motivate the village.

Question 17.
Observe a lawn in your area (if you have one) and see how It is maintained. Find out from the gardener the different types of plants that he removes from time to time. Do you think a farmer does the same thing on his farm?
Answer:
The gardener removes all the species of plants that grow in the lawn from time to time. Farmer does the same thing on his farm. Hut the variation is all the plants are removed from lawn just for pleasant look whereas farmer remove only weed plants that compete with the crop plants for space, nutrients, water and sunlight. This is to incase the productivity of crop plants.

Question 18.
What do fossil fuels provide us?
Answer:

  • Fossil fuels provide us energy.
  • This energy can be used for various purposes such as running vehicles, machinery in industries, etc.
  • They are also useful in the production of electricity.

Question 16.
What would you do to motivate others to manage an important resource in your locality?
Answer:
To motivate others manage an important resource in my locality I will do the following activities:

  • I will explain the importance of resource and need for its proper management.
  • I will conduct the seminars on this issue.
  • With the help of my friends and teachers i will conduct some competitions like debit, essay writing, etc., on this issue.
  • I will plan some cultural activities such as songs, skits that explain the importance of managing the resource and exhibit them in the school and the village to motivate the village.

Question 17.
Observe a lawn in your area (if you have one) and see how it is maintained. Find out from the gardener the different types of plants that he removes from time to time. Do you think a farmer does the same thing on his farm?
Answer:
The gardener removes all the species of plants that grow in the lawn from time to time. Farmer does the same thing on his farm. Hut the variation is all the plants are removed from lawn just for pleasant look whereas farmer remove only weed plants that compete with the crop plants for space, nutrients, water and sunlight. This is to in case the productivity of crop plants.

Question 18.
What do fossil fuels provide us?
Answer:

  • Fossil fuels provide us energy.
  • This energy can be used for various purposes such as running vehicles, machinery in industries, etc.
  • They are also useful in the production of electricity.

Question 19.
Why do we need to conserve the fossil fuels?
Answer:

  • Fossil fuels are non-renewable resources.
  • If once they are used up, they never replanish again or take several thousands of years to replanish.
  • They become integral part of our life, that we cannot live without these.
  • So, we need to conserve fossil fuels so that we don’t run out of them.

Question 20.
What other things could you reuse to save our resources?
Answer:
Things that can be reuse to save our resources are

  • Water
  • Paper
  • Metals like iron, steel, etc.
  • Plastic

Question 21.
Why should one sort wastes carefully before discarding them from home?
Answer:

  • If the wastes are sorted carefully before discarding them from home, there are certain advantages.
  • We can plan and recycle the waste.
  • Biodegradable waste can be used to prepare manure.
  • Paper, metals or any other materials that can be reuse or recycle can be utilised.
  • Non-biodegradable materials such as plastic which cannot be recycled can be discarded.

TS 10th Class Biology Study Material 10th Lesson Natural Resources

Question 22.
Often we keep a plastic bagin our dust bins to discard waste, is Ita good practice?
Answer:

  • Some people keep a plastic bag in dustbins to discard waste. This is for their convenience in discarding.
  • But it is not at all a good practice.
  • Plastic is nonbiodegradable, takes several years to mix with the soil.
  • When plastic bags are discarded along with the waste. They never mix with soil, and causes soil pollution.
  • When vegetable waste is discarded in plastic bag, if any animal feed on it, they enter into their stomach and cause problem.
  • If they are discarded into drainages, they block the flow of sewage water, stagnation of drainage waste creates unhygenic conditions, helps mosquito growth and causes diseases.
  • If this waste reaches soil, pollution of soil occurs which deplets soil health.

Question 23.
Discuss about various programmes to implement ‘recover’ to prevent environmental threat.
Answer:
To regrow the trees in other areas which are cut during construction. Recycling of waste materials decreases the scope of the land and air pollution. Treat the polluted water resources to decrease the water pollution.
Ex : Ganga water treatment policy. To decrease the particulate matter in air by using the air filters. To use public transports and reduce personal cars usage to recover the air pollution.

4 Mark Question and Answers :

Question 1.
Data at the beginning of the study
Answer:

Village Total Area in acres (approximately) Area Under Irrigation Number of Wells
Wanaparthy 4000 1000 155
Vaddicherla 3000 450 175

a. What is the total irrigated area (in acres), in Wanaparthy ?
Answer:
The total irrigated area in Wanaparthy is 4000 acres.

b. If one needs to irrigate all the land in Wanaparthy, how many wells would be required ?
Answer:
Number of wells required to irrigate all the land in Wanaparthy are 620.

TS 10th Class Biology Study Material 10th Lesson Natural Resources

c. Will the area under irrigation change due to increase in population Why / Why not ?
Answer:
No, the area under irrigation change due to increase in population.

Question 2.
Data after five years

Village Area under irrigation
(in acres)
Number of wells
Wanaparthy 860 95
Vaddicherla 315 56

a. If the number of wells were 95 how many have dried up?
Answer:
60 wells were dried up. (155 – 95 = 60°)

b. How does ‘decline in number of wells’ affect area under cultivation?
Answer:
Decline in number of wells represents fall of ground water levels due to less rainfall.

c. How would crops be affected due to decline in the number of wells ?
Answer:
The crops do not grow well and the yield is less due to decline in the number of wells.

d. Which village do you think is more affected ?
Answer:
Vaddicherla is more affected.

TS 10th Class Biology Study Material 10th Lesson Natural Resources

e. Should people in these villages continue to grow paddy ?
Answer:
No. the people in these villages should not continue to grow paddy.

Question 3.
Annual expenditure on well irrigation for small and large farmers
Answer:

Village Land holding of Farmer Depth of bore well (In feet) Total cost of well irrigation per acre per year in rupees
Wanaparthy Large 130 – 200 25000 – 70000
Small 110-180 25000 – 65000
Vaddicherla Large 90-300 22000 – 50000
Small 60 – 200 20000 – 45000

a. If a well can irrigate 2.5 percent of Irrigated land in rainy season, how many wells would irrIgate 860 acres of land?
Answer:
A well irrigation land 2.5 percent.
Land = 860 acres.
Required wells = \(\frac{860}{2.5}\) x 100 = 34,400

b. Which factor has a greater effect on expenditure, number of wells or dep a well?
Answer:
Depth of a well has greater effect on expenditure.

c. What is the total expenditure on a small irrigated land owned by a farmer in Vaddicherla? How do you think a farmer meets this expenditure?
Answer:
The total expenditure on a whole cultivable land owned by a small farmer in Vaddicherla is a round 20,000 – 45,000 rupees per acre per year. The small farmer meets this expenditure through agricultural loans from banks.

d. What could help the farmer reduce expenditure? (Hint: think of crops that require less water)
Answer:
Cultivating the crops which require less amount of water.

TS 10th Class Biology Study Material 10th Lesson Natural Resources

e. Do you think increasing the depth of bore well is a good solution for Increasing total land area under irrigation? Why/Why not?
Answer:
Increasing the depth of bore well is not a good solution for increasing total land area under irrigation. This is because with increasing depth, expenditure also will increase so net profit will decrease. Moreover, ground water level decreases much more and has to dig more depth.

Question 4.
Income on crops

Village Land holding of Farmer Net income per acre in Rupees Total income per acre year in rupees
Paddy Kharif Paddy Rabi Cotton Gingelly
Wanaparthy Large 8200 8700 4900 3300 25100
Small 7046 8490 10889 3110 29535
Vaddicherla Large 10698 5970 4000 3595 24263
Small 9128 7380 3031 2650 22189

a. Which crop is most profitable for a small farmer in Vaddicherla ?
Answer:
For a small farmer in Vaddicherla, Paddy in Kharif is more profitable.

b. What is the difference between a farmer in Wanaparthy and Vaddicherla with small land holdings ?
Answer:
A small farmer in Wanaparthy is getting more net income on Rabi paddy, Cotton and Gingelly whereas small farmer in Vaddicherla is getting more income on Kharif paddy. In total, small farmers in Wanaparthy are getting more income than farmers in Vaddicherla as they are using water resource properly.

c. Which crop could replace paddy and be profitable for a farmer in Wanaparthy ?
Answer:
If cotton replaces paddy, it will be profitable.

d. Though we know that paddy consumes maximum water, why do you think farmers still like to grow paddy ?
Answer:
Though paddy consumes maximum water, farmers believe that it is profitable and less risky. So they still like to grow paddy.

TS 10th Class Biology Study Material 10th Lesson Natural Resources

e. What is the impact of a depleting resource upon the farmers ?
Answer:
Depleting resource increases the cost of production. So the farmers are becoming poor and poor as cost increases and profit or income decreases.

f. Do you think the income of a farmer with small land holding in Vaddicherla is sufficient to meet his expenditure ?
Answer:
No, the income of a farmer with small hand holding in Vaddicherla is not sufficient enough to meet his expenditure.

g. Do you think farming as an occupation is profitable for farmers in Vaddicherla ?
Answer:
No. Farming as an occupation is not profitable for farmers in Vaddicherla.

h. Would the farmer have to look for other kind of occupations to meet his needs ?
Answer:
No need to look for other kind of occupations to meet their ends, but has to select proper crops that requires less water, proper methods that increase ground water, proper devices to use water discriminately.

Question 5.
How can we use water judiciously?
Answer:
We can use water judiciously by

  • Using only required quantity of water.
  • Minimising the waste.
  • Developing methods to use less water and get more benefits out of it.
  • Reusing once used water.
  • Recycling of the water.
  • Recharging the ground water.
  • Adapting micro irrigation techniques in agriculture.
  • Not polluting the water sources.

Question 6.
What do you think will happen If we do not take care of the sources of water?
Answer:
If we do not take care of the sources of water.

  • The water becomes scarce.
  • There will be no sufficient water for agriculture.
  • Agricultural productivity will decrease.
  • Food scarcity may arise.
  • Demand will increase for Agribased products.
  • Poor people may not get proper nutritious food as the cost is more.
  • Proper drinking water may not available.
  • Fluorine level in ground water will increase, who’s consumption may lead to fluorosis.
  • Disputes may arise between different states and countries for water resources.
  • Sea water introstion occurs and all the ground water will become salty in coastal regions.
  • Fertile lands may become like deserts.

TS 10th Class Biology Study Material 10th Lesson Natural Resources

Question 7.
Why is it important to recharge the ground water sources?
Answer:

  • Recharge of the ground water sources is very important.
  • This is because nearly 43% of irrigating land is getting water from ground.
  • Due to over drilling of bore wells and pulling out of water using electric motors, the ground water level is decreasing day by day.
  • If it goes on without recharging, ground water becomes scarce.
  • It shows impact on agriculture, the productivity wilt decrease.
  • Fluorine level in ground water will increase.
  • Saline water may intrude into the interior places of land and water becomes unfit for both drinking and agriculture.
  • Farmers have to drill the bore wells to more depths which increase the losses for them.

Question 8.
How did the villagers in Kothapally resort to sustainable management?
Answer:

  • The villagers in Kothapally resort to sustainable management with the help of ICRJSAT.
  • ICRISAT educated villagers by large and provided technical support for cost efficient water storage and soil conservation structures.
  • The measures were community as well as individual farmer-based.
  • Fourteen water storage structures with the storage capacity of 300 to 2000 m3, 60 mini percolation pits, field bunding on 38 hectares were completed.
  • Twenty-eight dry open wells, near Nalla were recharged by building dykes in the NaNa and retaining the run off rain water in it.
  • A user group was formed for each water storage structure and the water collected was exclusively used for recharging the ground water to the dried well.
  • Broad bed furrow land form and contour planting was implemented to conserve soil and water.
  • Gliricidia plants are planted on the field bunds to strengthen the land, make the soil nitrogen rich.
  • Farmers were encouraged to use water resources jointly and irrigate land using micro-irrigation techniques.
  • Saplings of useful species were planted along the roads, field bunds and Nallas.

Question 9.
Why do you think forests are important?
Answer:
Forests are important because,

  • They are rich habitat for plants and animals.
  • They serve as a lung for the world.
  • They purify air, decrease carbon dioxide, global warming and green house effect.
  • Thus provide various valuable things such as wood, medicines, etc.
  • They are providing raw materials for several industries.
  • They maintain ecological balance in nature.
  • They preserve the soil fertility.
  • They cause rains.

Question 10.
Collect information about solar, wind, tidal and water power and prepare a scrap book Collect Information about conventional energy sources from internet and prepare a note on it.
Answer:
Solar energy: To use solar energy is to generate electricity from sunlight. For this purpose special chemical substances which are sensitive to light have been developed. When light falls on these substances, small chemical current is generated. This material is coated on a metal plate and this is used for producing large amounts of electricity. This current can be stored and used when needed. Watches, calculators, street lamps have been invented which use the current produced by light falling on light sensitive material.

TS 10th Class Biology Study Material 10th Lesson Natural Resources

Wind energy : Wind mills are in use for centuries especially for pumping water from wells. In wind mills, wind rotates the blades of wind will and is used to move the pistons and lift the water from the well. In earlier days, the fan blades of wind mill were made of wood or thin metal sheets which were heavy and inefficient. In recent years, wind mills are made of tough, strong, light weight plastic material and wind energy is being used to pump water and to run turbines for the production of electricity.

Tidal energy: Large amounts of energy (kinetic energy) is stored In the waves especilally in seas. Special devices have been made to rotate as the water passes through them by the wave action. This is used to run turbines or generate electricity.

Water power: Dams are constructed across the rivers. Water from the reservoir falls from a height on the turbines.This water falls is used to drive turbines to generate electricity. These are called hydro electric projects.

Question 10.
Collect information about solar, wind, tidal and water power and prepare a scrap book Collect Information about conventIonal energy sources from internet and prepare a note on it.
Answer:
Solar energy: To use solar energy is to generate electricity from sunlight. For this purpose special chemical substances which are sensitive to light have been developed. When light falls on these substances, small chemical current is generated. This material is coated on a metal plate and this is used for producing large amounts of electricity.

This current can be stored and used when needed. Watches, calculators, street lamps have been invented which use the current produced by light falling on light sensitive material.

Wind energy : Wind mills are in use for centuries especially for pumping water from wells. In wind mills, wind rotates the blades of wind will and is used to move the pistons and lift the water from the well. In earlier days, the fan blades of wind mill were made of wood or thin metal sheets which were heavy and inefficient. In recent years, wind mills are made of tough, strong, light weight plastic material and wind energy is being used to pump water and to run turbines for the production of electricity.

Tidal energy: Large amounts of energy (kinetic energy) Is stored In the waves especilally in seas. Special devices have been made to rotate as the water passes through them by the wave action. This is used to run turbines or generate electricity.

Water power: Dams are constructed across the rivers. Water from the reservoir falls from a height on the turbines.This water falls is used to drive turbines to generate electricity. These are called hydro electric projects.

Question 11.
Ask your teacher about nuclear energy and Its impacts on ecosystem.
Answer:
Nuclear energy is produced by splitting the nucleus of an atom of elements like uranium or plutonium. Another process for the production of nuclear energy is called fusion. In this process two nuclei of the same elements are fused with one another. In this process much more energy is produced than by fission reaction. This energy is produced as heat.

This is used to produce steam which runs generators to produce electricity. There are some problems associated with genergation of nuclear energy. Several precautions have to be taken to prevent leakage of radioactive toxic materials from nuclear reactors. The uranium required for nuclear reactor is processed at nuclear fuel complex in Hyderabad.

TS 10th Class Biology Study Material 10th Lesson Natural Resources

Question 12.
Do you think it is necessary to have a lot of lighting for decoration during celebrations?
Answer:

  • No, it is not necessary to have a lot of lighting to decorate an occasion of celebration.
  • Decorating with more lights consumes more electricity.
  • Excess use of electricity leads to energy crisis.
  • Most of the electricity is produced from fossil fuels like coal or diesel (generator).
  • So it leads to depletion of our natural resources.
  • Excess production of electricity from coal increases global warming.
  • Thus it leads to changes in the environment and pollution also.
  • So electricity should be used discriminately.

Question 13.
Collect information about technology used for transplantation of trees and discuss in your classroom.
Answer:
The tree transplantation technology involves the following procedures.

  • Initial preparation by examining roots and tree health.
  • Soil sampling and site selection.
  • Root purning and initiating fresh root growth.
  • Tree packing, feeding and monitoring for adaptation.
  • Tree transplantation by lifting with crane.
  • Mechanical support and purning.
  • Post translational treatment.

Question 14.
Suggest some ways in which you and your friends would like to manage a resource.
Answer:

  • Me and my friends can manage the biodiversity in our school.
  • First we will make a map of our school.
  • By studying we can identify various plants, insects and small animals like squirrels, etc. growing in our school.
  • We will mark the details in the map and note down the details in a notebook.
  • By dividing ourselves into various groups we will take care of flora and fauna.
  • We will water the plants regularly.
  • We will provide proper protection to both flora and fauna.
  • Thus we can manage a resource.

Question 15.
Are we also an important resources of nature? How?
Answer:

  • Natural resource are resources that we get from nature.
  • We are also a part of this nature.
  • Fauna is also a natural resource, actually we come under this category.
  • The human beings are the most intelligent animals on the earth.
  • We are capable of bringing changes in nature and utilize the other resources of nature effectively using our intelligence.
  • Like the other resources, we are also useful to the nature in one or other way.
  • Knowledge and intelligence are the key factors for the resourcefulness of a person.
  • Thus we are also an important resource of nature called human resources.

Question 16.
Find out the usage of water in litres per day in your home ? Do you actually require that much water and how much water is enough in accordance with National standards?
Answer:

  • In my house 900 litres of water is being used per day at the average of 225 litres for a person per day (4 members family).
  • Actually this much water is not required.
  • We can conserve atleast 400-500 litres of water at the average of 100 to 125 litres per head.
  • In India, the design of water supply system has been done using certain standards.
  • Currently the standard being used is BIS 1179: 1993, reaffirmed in 1998.
  • According to this, for communities with a population between 20,000 to 1,00,000 – 100 to 150 litres per head per day can be considered.
  • For communities with population over 1,00,000 – 150 to 200 litres per head per day can be considered.
  • On the whole, at an average of 150 litres per head per day is enough in accordance with National standards.

TS 10th Class Biology 10th Lesson Natural Resources Activities

Activity – 1.

Study the different ways in which water Is used, misused and recycled in the area where you stay. Prepare a questionnaire with the help of your friends and teacher and study at least five households in your locality for the same. Also explore and discuss ways to provide water for all. Ways in which water is used:
Answer:

  • Drinking
  • Bathing
  • Washing clothes
  • Cleaning utensils
  • For plants in garden and agriculture, etc.

Ways in which water is misused:

  • Not closing the taps after using.
  • Contaminating the water.
  • Brushing near open taps.
  • Getting bath under shower
  • Playing with water.
  • Washing vehicles with water pipe.

Ways in which water is recycled:

1. Allowing the water used in kitchen for garden.
2. Using the once-used water to wash vehicles.
3. Using the water from bathing for toilet flush.
4. Washing hands in plant pots.

TS 10th Class Biology Study Material 10th Lesson Natural Resources

Questionnaire:

1. For what purposes water is being used in your home?
2. From where this water is being collected?
3. Are you using water only for the needed things?
4. Are you closing taps properly after using?
5. Are you getting shower bath?
6. Are you using more water than required for cleaning, bathing, etc.?
7. Are there any leaks in your water pipelines?
8. Are you recycling the once used water?
9. In what way are you recycling the water?
10. What measures do you suggest to conserve water and make it available for all?

Ways to provide water for all:

1. Wastage of water should be strictly minimised.
2. Washing hands in the plant pots.
3. Rain water should be directed into recharge pits.
4. Care should be taken to prevent leakage of water from pipes and taps.
5. Wash clothes in running water canals if possible.
6. Direct the kitchen water free from soap and detergents to the garden.
7. Use the soap and detergent water for toilet flush or cleaning vehicles.
8. Recycling of water can be done on large scale towns and cities and can be utilised again.
9. Cooperation between the states through which a river passing is very essential for providing water for all.
10. People should be motivated in such a way that each drop of water is life and should conserve it.

Activity – 2.

Find out how many different types of insects are present In and around your house. Do you find the same type of insects in all seasons ? Make a chart of Insect types and not their occurrence for at least a week in each season. Repeat for other seasons. Study for a year and find out when you have highest varieties of them. Study them for subsequent years to see if they have disappeared.
Answer:
Different types of insects present in arid around our houses:

  • Cockroach
  • Housefly
  • Grasshoppers
  • Mosquitos
  • Mites
  • Beetles etc.

Different insects are found in different seasons.
TS 10th Class Biology Study Material 10th Lesson Natural Resources 3
In summer and rainy seasons we can find highest varieties of these. Their population is maintaining almost standardly.

TS 10th Class Biology Study Material 10th Lesson Natural Resources

Activity – 3.

Nowadays people are revolting against mining. Collect any such incident of our state or neighbouring states from school library or newspapers and conduct a seminar on its impact.
Answer:

  • People living in hill top hamlets in seven mandais of Visakhapatnam and East Godavari districts are up in arms against latente mining in Nagulakonda hill range.
  • Latente is a raw material used by cement factories.
  • Huge deposits of latente worth hundreds of crore rupees are found in Nathavaram and Koyyuru mandates in Visakhapatnam and Pratthipadu, Yeleswaram, Sankhavaram, Routulapudi and Kotananduru in East Godavari.
  • AH these mandais are technically corning under scheduled areas.
  • if the mining continues here, it will badly threaten the ecology of that area.
  • The tribal people in that area will lose their livelihood.
  • To reach the mining area road should be laid in the reserve forest area.
  • This leads to depletion of forest resources also.
  • Health of the local people will be badly affected due to the dust spread during mining.
  • Keeping all these in mind the tribal people are opposing the mining in that area.

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