10th Science Book Back Answers Unit 22 – Environmental Management:
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Samacheer Kalvi 10th Science Book Back Answers Biology Unit 22 – Environmental Management:
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10th Science – Biology
Unit 22: Environmental Management
I. Choose the best answer:
1. Deforestation leads to _____ in rainfall.
Ans.: Decrease
2. Removal of soil particles from the land is called _____.
Ans.: Soil erosion
3. Chipko movement is initiated against ______.
Ans.: Cutting trees/ Deforestation
4. _____is a biosphere reserve in Tamilnadu.
Ans.: Nilgiris
5. Tidal energy is type of _______energy.
Ans.: Non-conventional/ Renewable
6. Coal, petroleum, and natural gas are called ______fuels.
Ans.: Fossil
7. ______is the most commonly used fuel for the production of electricity.
Ans.: Coal
II. True or False (Correct the Statement if it is false):
1. Biogas is a fossil fuel.
Ans.: False.
Correct statement: Biogas is a Biofuel.
2. Planting trees increases the groundwater level.
Ans.: True.
3. Habitat destruction cause loss of wildlife.
Ans.: True.
4. Nuclear energy is renewable energy.
Ans.: False.
Correct statement: Nuclear energy is a non-renewable energy.
5. Overgrazing prevents soil erosion.
Ans.: False.
Correct statement: Overgrazing increases soil erosion.
6. Poaching on wild animals is a legal act.
Ans.: False.
Correct statement: Poaching of wild animals is an illegal act.
7. National park is a protected park.
Ans.: True.
8. Wildlife protection act was established in 1972.
Ans.: True.
IV. Match the following:
1. Soil erosion (a) energy saving
2. Bio gas (b) acid rain
3. Natural gas (c) removal of vegetation
4. Green house gas (d) renewable energy
5. CFL bulbs (e) CO2
6. Wind (f) non-renewable energy
7. Solid waste (g) lead and heavy metals
Answer:
- (c) Removal of vegetation
- (d) Renewable energy
- (f) Non-renewable energy
- (e) CO2
- (a) energy saving
- (b) acid rain
- (g) Lead and heavy metals
IV. Choose the best answer:
1. Which of the following is/are a fossil fuel? i. Tar ii. Coal iii. Petroleum
a) i only b) i and ii c) ii and iii d) i, ii and iii
Ans.: d) i, ii and iii
2. What are the steps will you adopt for better waste management?
a) reduce the amount of waste formed b) reuse the waste
c) recycle the waste d) all of the above
Ans.: d) All of the above
3. The gas released from vehicles exhaust are ______.
i. Carbon monoxide ii. Sulphur dioxide iii. Oxides of nitrogen
a) i and ii b) i and iii c) ii and iii d) i, ii and iii
Ans.: d) i, ii and iii
4. Soil erosion can be prevented by ________.
a) deforestation b) afforestation c) overgrazing d) removal of vegetation
Ans.: b) Afforestation
5. A renewable source of energy is _________.
a) petroleum b) coal c) nuclear fuel d) trees
6. Soil erosion is more where there is _________.
a) no rainfall b) low rainfall c) rainfall is high d) none of these
Ans.: c) rainfall is high
7. An inexhaustible resource is ________.
a) wind power b) soil fertility c) wildlife d) all of the above
Ans.: a) wind power
8. Common energy source in the village is ________.
a) electricity b) coal c) biogas d) wood and animal dung
Ans.: d) wood and animal dung
9. Greenhouse effect refers to __________.
a) cooling of the earth b) trapping of UV rays c) cultivation of plants d) warming of the earth
Ans.: d) warming of the earth
10. A cheap, conventional, commercial, and inexhaustible source of energy is __________.
a) hydropower b) solar energy c) wind energy d) thermal energy
Ans.: a) hydropower
11. Global warming will cause __________.
a) raise in level of oceans b) melting of glaciers c) sinking of islands d) all of these
Ans.: d) all of these
12. Which of the following statement is wrong with respect to wind energy
a) wind energy is a renewable energy
b) the blades of wind mill are operated with the help of electric motor
c) production of wind energy is pollution free
d) usage of wind energy can reduce the consumption of fossil fuels.
Ans.: b) the blades of wind mill are operated with the help of electric motor
Other Important links for 10th Science Book Answers Solutions:
For the 10th Standard Science Unit 23 book back question and answers solutions PDF, check the link – Samacheer kalvi 10th Science Unit 23 – Visual Communication
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