Class 10 Science Chapter 16 Management of Natural Resources answer to each chapter is provided in the list so that you can easily browse throughout different chapters NCERT Class 10 Science Chapter 16 Management of Natural Resources and select need one.
Class 10 Science Chapter 16 Management of Natural Resources
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Management of Natural Resources
Chapter – 16
Textual Questions and Answers:
Page No – 269
Q.1. What changes can you make in your habits to become more environment friendly?
Ans: We can make the following changes in our habits to become more environment friendly.
1. Stop wastage of water.
2. Switching off unnecessary lights and fans.
3. Dont waste food.
4. Take as much as you require.
5. Walking down or use cycle for going to nearby market instead of using vehicle.
6. Separate wastes into recyclable and non-recyclable.
7. Reuse carry bags packing materials plastic containers and other reusable material.
Q.2. What would be the advantage of exploiting resources with short term – aims?
Ans: The exploitation of resources with short-term aims means the consumption of resources in such a way that they can help in achieving the short term goals without the concern for future generations.
The advantages of exploiting resources with short term aims will be:
(a) Industrial growth will be fast.
(b) The percentage of gains will be much higher in comparison to long term aims.
(c) Capital rotation will be faster.
(d) It will lead to rapid agricultural development.
Q.3. How would these advantages differ from the advantages of using a long-term perspective in managing our resources?
Ans: If the resources are used with long term perspective:
1. The demand of present as well as the future generations will be met.
2. There will be a lower level of pollution.
3. If the resources are used in the long run, there might be enough time for the resources to get replenished. In such a situation, no generation would be deprived of resources.
Q.4. Why do you think there should be equitable distribution of resources? What forces would be working against an equitable distribution of our resources?
Ans: Equitable distribution of resources is when every individual gets an equal right to access all the available resources and is benefited, directly or indirectly. Equitable distribution of resources is necessary as we all human beings, whether rich or poor have got equal rights on the usage of the resources. It also avoids the division of society to an extent.
The main forces which work against equitable distribution of resources include:
1. Lack of natural resources.
2. Excessive consumption by the rich.
3. Profit motto by people exploiting resources.
4. Corruption, etc.
Page – 273
Q.1. Why should be conserve forests and wild life?
Ans: It sustains life on the planet, provides clean air and shelter. Also, forests help conserve biodiversity. Forests provide many resources such as food, medicine, fabric, and raw materials.
The conservation of wildlife is necessary for prevention of drought, new deserts, fires as well as flood. Also, this conservation ensures that the upcoming generations of human and wildlife will be surrounded by nature thereby loving it and understanding the significance of wildlife.
Q.2. Suggest some approaches towards the conservation of forests.
Ans: Some approaches towards the conservation of forests are as follows:
(a) People should show their participation in saving the forest by protesting against the cutting of trees. For example, Chipko Andolan
(b) Planting of trees should be increased. Rate of afforestation must be more than that of deforestation.
(c) Some people cut precious trees such as Chandan to earn money. Government should take legal steps to catch these wood smugglers.
(d) Habitants of forests must not be bothered by the forest officials. Otherwise, this would result in the clash between tribal people and the government officials, thereby enhancing the naxal activities in forests.
Page – 276
Q.1. Find out about the traditional systems of water harvesting / management in your region.
Ans. The traditional system of water harvesting in our region is the rooftop water harvesting using tanks. Tanks are kept at the roofs during rains. The rainwater gets collected in these tanks, and this rainwater can be used later for various household chores.
Q.2. Compare the above systems with the probable systems in hilly/mountainous areas or plains mor plateau regions.
Ans: Dams are built over rivers in hilly/mountainous areas. They are more advantageous because to store running river water which can be used to generate electricity. Moreover, since the water stored in dam keeps flowing to turn the turbines, it does not act as a breeding ground for mosquitoes which spread malaria. The stagnant water in ponds and cakes, however, becomes a breeding ground for mosquitoes.
Q.3. Find out the source of water in your region/locality is water from this source available to all people living in that area?
Ans: The source of water in our region is ground water. Water from the source is available to all the people living in that area.
EXERCISE:
Q.1. What changes would you suggest in your home in order to be environment friendly?
Ans: (i) Use CFLS instead of traditional filament type electric bulbs:
1. Useless of plastic.
2. Use solar cooker to cook food whenever possible.
3. Eat as much you required but do not waste food.
4. Use water judiciously.
Q.2. Can you suggest some changes in your school which would make it environment friendly?
Ans: 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.
Q.3. We saw in this chapter that there are four main stakeholders when it comes to forests and wildlife. Which among these should have the authority to decide the management of forest produce? Why do you think so?
Ans: Because they are a branch of the government that is elected by the people, the government’s forest department should have the authority. These forest officials, on the other hand, must not be corrupt and must not accept payments from poachers or smugglers. The forest authorities can efficiently maintain and preserve forest regions by utilising government resources.
Q.4. How can you as an individual contribute or make a difference to the management of
(a) Forests and wild life.
Ans: The three ways in which an individual can contribute effectively to the management of forests and wildlife are as follows:
- One should protest against the cutting of trees (deforestation).
- One should protest against the poaching of wild animals.
- One should stop the annexation of forest land for personal use.
(b) Water resources. And
Ans: Water resources:
1. Turn the taps off while brushing or bathing and repair leaking taps.
2. We should practice rainwater harvesting.
3. We should avoid the discharge of sewage and other wastes into rivers and other water resources.
(c) Coal and petroleum?
Ans: There are the two non-renewable resources that are used by every individual in form of fuel either for cooking or an automobile, in factories, in railways and so on.
Q.5. What can you as an individual do to reduce your consumption of the various natural resources?
Ans: Water, forests, coal, and petroleum, among other natural resources, are critical for human survival.
The following are some of the ways we can limit our use of various natural resources:
1. Deforestation should be avoided.
2. To limit the amount of trees cut down, we should utilise recycled paper.
3. We should not dispose of wastewater.
4. Rainwater harvesting should be practised.
5. To reduce the amount of petroleum we consume, we should carpool.
Alternative energy sources, such as hydropower and solar power, should be used.
Q.6. List five things you have done over the last one week to:
(a) Conserve our natural resources.
Ans: The five things done by me over the last one week conserve our natural resources were:
(i) Travel by a CNG bus for long distances and walk for short distances.
(ii) Use recycled paper.
(iii) Throw biodegradable and non-biodegradable waste into separate bins.
(iv) Plant trees.
(v) Harvest rainwater.
(b) Increase the pressure on our natural resources.
Ans: To increase the pressure on our natural resources:
(i) Use non-renewable resources of energy.
(ii) Waste water.
(iii) Waste electricity.
(iv) Use plastics and polythene bags for carrying goods.
(v) Use escalators.
Q.7. On the basis of the issues raised in this chapter, what changes would you incorporate in your life-style in a move towards a sustainable use of our resources?
Ans: One should incorporate the following changes in life-style in a move towards a sustainable use of our resources:
(a) Stop cutting trees and practice plantation of trees.
(b) Stop using plastic and polythene bags for carrying goods.
(c) Use recycled paper.
(d) Throw biodegradable and non-biodegradable waste into separate bins.
(e) Waste minimum amount of water while using and repair leaking taps.
(f) Practice rainwater harvesting.
(g) Avoid using vehicles for short distances. Instead, one can walk or cycle to cover short distances.
(h) To cover long distances, one should take a bus instead of using personal vehicles.
(j) Switch off electrical appliances when not in use.
(k) Use fluorescent tubes in place of bulbs to save electricity.
(l) Take stairs and avoid using lifts.
(m) During winters, wear an extra sweater to avoid using heaters.
Multiple Choice Questions:
Q.1. Which of the following is not a natural resource?
(a) Snake.
(b) Wind.
(c) Wooden house.
(d) Mango tree.
Ans: (c) Wooden house.
Q.2. The three R’s which can help us to conserve natural resources for long term use are:
(a) Recycle, regenerate, reuse.
(b) Reduce, regenerate, reuse.
(c) Reduce, reuse, redistribute.
(d) Reduce, recycle, reuse.
Ans: (d) Reduce, recycle, reuse.
Q.3. The main reason for the abundant coliform bacteria in the water of river Ganga is:
(a) Immersion of ashes of the dead into the river.
(b) Washing the clothes on the banks of river.
(c) Discharge of industrial waste into river water.
(d) Disposal of urbunt corpses in to river water.
Ans: (d) Disposal of urbunt corpses in to river water.
Q.4. The Pᴴ of a sample of water collected from a river is found to be in the range of 3.5 to 4.5. The most likely reason for this is the water being discharged into the river from a:
(a) Soap and detergent manufacturing factory.
(b) Car battery manufacturing factory.
(c) Alcohol manufacturing factory.
(d) Plastic cups manufacturing factory.
Ans: (b) Car battery manufacturing factory.
Q.5. Which of the following statement is in correct:
(a) Economic development is linked to environmental Conservation.
(b) Sustainable development meets the current basic human Needs and also preserves resources for future generations.
(c) Sustainable development does not take into consideration the viewpoints of all stakeholders.
(d) Sustainable development is a long planned and persistent development.
Ans: (c) Sustainable development does not take into consideration the viewpoints of all stakeholders.
Q.6. Arabari forest of Bengal is dominated by:
(a) Teak.
(b) Sal.
(c) Bamboo.
(d) Mangroove.
Ans: (b) Sal.
Q.7. Ground water will not be depleted due to
(a) Process of afforestation.
(b) Establishing thermal power plants.
(c) Process of deforestation.
(d) Cultivation of high yielding varieties of
Ans: (a) Process of afforestation.
Q.8. Ahars, Kattas, Bhundhis and Khadims are the modes of
(a) Grain storage.
(b) Soil conservation.
(c) Water harvesting.
(d) Cold Storage.
Ans: (c) Water harvesting.
Q.9. Which of the following combination of terms has no fossil fuel?
(a) Wind, ocean, coke.
(b) Kerosene, tide, wind.
(c) Wood, wind, sun.
(d) Petrol, wood, sun.
Ans: (c) Wood, wind, sun.
Q.10. The Bishnoi community of Rajasthan is associated with the conservation of
(a) Coal and petroleum.
(b) Forests and wildlife.
(c) Water resources.
(d) Abiotic environment.
Ans: (b) Forests and wildlife.
Q.11. The chipko Andolan is associated with
(a) Tigers.
(b) Turtles.
(c) Trees.
(d) Tomatoes.
Ans: (c) Trees.
Q.12. Amrita Devi Bishnoi was associated with
(a) Preventing the custom of child marriage in Rajasthan.
(b) Campaign to save the girl child.
(c) Conservation of cultural heritage of Rajasthan.
(d) Conservation of forest and wildlife.
Ans: (d) Conservation of forest and wildlife.
Q.13. One of the following is not a direct stakeholder in the management (or conservation) of forests. This is
(a) The people who have paper mills.
(b) The people who run the forest department.
(c) The people who campaign for the conservation of forest.
(d) The people who live in urban areas.
Ans: (d) The people who live in urban areas.
Q.14. The river water is said to be polluted with acidic wastes if the pH of river water is:
(a) Zero.
(b) Above 7
(c) Below 7
(d) Exactly 7
Ans: (c) Below 7
Q.15. The major program started to replenish the damaged forests is called:
(a) Horticulture.
(b) Tissue culture.
(c) Agriculture.
(d) Silviculture.
Ans: (d) Silviculture.
Q.16. With which tree Amrita Devi Bishnoi is associated?
(a) Khajoor.
(b) Khejroli.
(c) Khejri.
(d) Keekar.
Ans: (c) Khejri.
Q.17. One of the following does not contribute in producing acid rain. This one is:
(a) Sulphur dioxide.
(b) Carbon dioxide.
(c) Nitrogen oxides.
(d) Carbon monoxide.
Ans: (d) Carbon monoxide.
Q.18. The poisonous gas which reduces the oxygen – carrying capacity of blood to a large extent is:
(a) SO₂
(b) NO
(c) Co
(d) CO₂
Ans: (c) Co.
Q.19. Which of the following is not an ancient water harvesting structure?
(a) kattas.
(b) Sargam.
(c) Kulhs.
(d) Surangams.
Ans: (b) Sargam.
Q.20. Snakes are killed in large numbers because:
(a) They are very poisonous.
(b) They kill rates.
(c) Their skin is expensive.
(d) They damage the crops.
Ans: (c) Their skin is expensive.
Q.21. Which of the following is not a fossil fuel?
(a) LPG.
(b) Natural gas.
(c) Biogas.
(d) CNG.
Ans: (c) Biogas.
Q.22. Which of the following is not a natural resource?
(a) Soil.
(b) Water.
(c) Electricity.
(d) Natural gas.
Ans: (c) Electricity.
Q.23. The most rapidly dwindling natural resource in the world is:
(a) Water.
(b) Soil.
(c) Sunlight.
(d) Forests.
Ans: (d) Forests.
Q.24. The use of one of the following is eco-friendly. This one is.
(a) cars for transportation.
(b) Polybags for shopping.
(c) Windmills for generating power.
(d) Dyes for colouring clothes.
Ans: (c) Windmills for generating power.
Q.25. Khadims are used in Rajasthan to:
(a) Hold water for irrigation.
(b) Recharge ground water.
(c) Promote soil erosion.
(d) Trap wild animals.
Ans: (b) Recharge ground water.
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