CBSE Class 10 Science Chapter-16 Management of Natural Resources – Free PDF Download
Free PDF download of Important Questions with Answers for CBSE Class 10 Science Chapter 16 – Management of Natural Resources prepared by expert Science teachers from latest edition of CBSE(NCERT) books only by CoolGyan to score more marks in CBSE board examination.
CBSE Class 10 Science Chapter-16 Management of Natural Resources Important Questions
CBSE Class 10 science Important Questions Chapter 16 – Management of Natural Resources
2 Mark Questions
1. Why is fuel oil better than coal for industrial use?
Ans. Fuel oil is better fuel than coal because fuel oil produces less unburnt particles human as ash.
2. Why is water necessary for living organisms?
Ans. Importance of water is-
(a) It is necessary for living organism to carry out their metabolic reactions.
(b) Water is a universal solvent.
(c) It is used for cleaning, washing, drinking, etc.
(d) It helps in excretion.
(e) It helps in transportation inside the body.
3. What are the reasons for conservation of forest and wildlife?
Ans. Forest and wild life are very important natural resources. They constitute biodiversity hot spot i.e. the place where maximum biodiversity is found. They are important source of timber, firewood, leaves, medicines fruits and many other products. Wild life is very important in the maintenance of ecosystem. They play important role in maintenance of food chain and food web. They constitute the precious genetic pool.
4. Mention disadvantages of dams.
Ans. Disadvantages of dams are-
(a) Deforestation- It causes loss of biological diversity (plants, animals and microbes) leads to many environmental problems like water logging, earth quakes etc.
(b) Displacement- Displacement of large number of peasants and tribal without enough compensation or rehabilitation lead to many social problems.
(c) Water-logging and Salinization- Canals drawn out from dams causes the problems of water-logging and salinization within years in dry and half dry sandy areas.
5. Why has it become necessary to look for inexhaustible energy sources?
Ans. We should look for inexhaustible resources because-
(a)To reduce pressure on exhaustible natural resources.
(b)To reduce pollution.
6. What is the difference between exhaustible and inexhaustible natural resources?
Ans.
7. Name four modes of traditional water harvesting at the community level.
Ans. Modes of traditional water harvesting are-
(a) Kulhs- Found in Himachal Pradesh.
(b) Khadis, Tanks and Nadis- Found in Rajasthan.
(c) Ponds- Jammu and Kashmir.
(d) Bundhis- M.P and U.P.
8. What are the advantages of exploiting resources with short term aim?
Ans. The advantages of exploiting resources with short term aim will be self-centered satisfaction. They provide immediate advantages.
9. Why wildlife is important to us?
Ans. Wildlife maintains balance in ecosystem. It is an important for regulating food chain and food web in ecosystem.
10. What is the difference between deforestation and afforestation?
Ans.
11. Name four alternatives to mega projects like dams.
Ans. Alternatives are-
(a) Digging of small pits and lakes.
(b) Construction of dykes (a low wall or bank used to prevent water from invading low lying land).
(c) Construction of sand and limestone reservoirs.
(d) Setting up of water collecting units.
12. What do you meant by conservation management?
Ans. Conservation- It is the preservation from loss, waste and degradation of resources so as to last indefinitely.
Management- Management of resources is controlling its use in such a way as to provide sustained and equitable availability.
13. What are the disadvantages of using coal and petroleum?
Ans. (A)It causes air pollution.
(B) It increases the temperature of the earth and causes global warming.
14. What is GAP? Explain.
Ans. GAP is Ganga Action plan which was initiated in 1985 to restore the quality of river Ganga. To reduce domestic load on the Ganga under Ganga action plan. Some of the schemes are-
(a) Interception and diversion.
(b) Treatment of waste water
(c) River front development
(d) Electric crematorium.
15. Write steps to conserve energy.
Ans. Steps of conservation of energy-
(a) Make use of stairs instead of life.
(b) Make a habit of switching off light, fans and other appliances when not in use.
(c) Solar heater, solar cooker, solar light used to cut down energy consumption.
(d) Soak the pulses in water before cooking. This saves fuel on cooking.
16. Mention two causes of over- exploitation of natural resources.
Ans. (1) Increased population requires more resources.
(2) Wastage – people do not use the resources judiciously.
17. What would be the advantage of exploiting resources with short-term aims?
Ans. (a) It can meet the immediate needs of the masses.
(b)We shall be able to get industrial growth.
18.How would these advantages differ from the advantages of using a long-term prospective in managing our resources?
Ans. Exploitation of resources with short-term aims are beneficial for present day generation while managing with long-term perspective are on a sustainable basis and are aimed to fulfill the needs of future generations as well.
19. Why should we conserve forests and wildlife?
Ans. Forests present a wide biological diversity. They are essential for ecological diversity, to prevent floods and to influence rainfall. Forests help in protection of soil and in retaining sub-soil water.
20. Suggests some approaches towards the conservation of forests.
Ans. (a) Afforestation
(b) Check on indiscriminate cutting of trees.
(c) Check on forest fires
(d) Check on overgrazing.
21. Find out the source of water in your region/locality. Is water from this source available to all people living in that area?
Ans. In Delhi, the source of water in Yamuna. Water from this source is available mostly to all people in Delhi.
22. What are “biodiversity hot spots”? What is the measure of the biodiversity?
Ans. Forests are “biodiversity hot spots”. One measure of the biodiversity of an area is the number of species found here.
23. What is the effect of continuous depletion of ground water along coastal region?
Ans. The effect of continuous depletion of ground water along coastal region will lead to movement of saline sea water into freshwater wells then spoiling their quality.
24. Why is dependence of man on nature greater than that of any other organism?
Ans. Man’s dependence on the environment is greater than that of other organisms because man:
(a) Develops cutiosity for more comforts and security.
(b) Consumes large amount of material and energy.
(c) Develops a new kind of socio-economic environment which consists of things developed by man through his tools and techniques.
25. In addition to low rainfall, what are the other reasons for non-availability of water in arid and semi-arid zones of our country?
Ans. (a) Flowing of rain water and lack of management to harvest it.
(b) Ground water is pumped out for high water demanding crops.
(c) Water becomes unsafe and unusable due to mixing of urban wastes and effluents from the industries.
26. Why is mining a big source of pollution?
Ans. Mining causes pollution because large amount of slag is discarded for every tone of metal extracted.
27. Write two points to be kept in mind while storing water in tanks.
Ans. Storage tank should not be located close to the source of contamination and should be accessible for cleaning.
28. Write any two alternatives to dams.
Ans. Adopting water harvesting techniques and reducing the scale of floods through better catchment management.
29. Why do you think there should be equitable distribution of resources?
Ans. We think that there should be equitable distribution of resources because not only a handful of rich and powerful people, but all the people may get benefit from the development of these resources.
30. Why should we preserve bio diversity?
Ans. If the bio-diversity is not preserved, the ecological stability of an area will be lost and ecological crisis will be caused.
31. What are “bio diversity hot spots”? Why this name has been given?
Ans. Forests are called No diversity hot spots because of the presence of a large number of species of plants and animals.
