Environmental Management

Samacheer Book Back Questions And Answers For Science Standard 10 “Environmental Management“

I. Fill in the blanks:
1. Deforestation leads to _____ in rainfall.
2. Removal of soil particles from the land is called _____.
3. Chipko movement is initiated against _____.
4. _____ is a biosphere reserve in Tamil Nadu.
5. Tidal energy is _____ type of energy.
6. Coal, petroleum and natural gas are called _____ fuels.
7. _____ is the most commonly used fuel for the production of electricity.

Answers:
1. decrease
2. soil erosion
3. deforestation
4. Nilgiris
5. renewable
6. fossil
7. Coal

II. State whether True or False. Correct the statements which are false
1. Biogas is a fossil fuel.
2. Planting trees increases the groundwater level.
3. Habitat destruction cause loss of wild life.
4. Nuclear energy is a renewable energy.
5. Overgrazing prevents soil erosion.
6. Poaching of wild animals is a legal act.
7. National park is a protected park.
8. Wild life protection act was established in 1972.

Answers:
1. True
2. True
3. True
4. False (Nuclear energy is a non renewable source of energy)
5. False (Overgrazing can lead to soil erosion)
6. False (Poaching of wild animals is illegal)
7. True
8. True

III. 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

Answers:
1. C
2. E
3. F
4. B
5. A
6. D
7. G

IV. Choose the correct 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

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

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

4. Soil erosion can be prevented by
a) deforestation
b) afforestion
c) over growing
d) removal of vegetation

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 rain fall
b) low rainfall
c) rain fall is high
d) none of these

7. An inexhaustible resources is
a) wind power
b) soil fertility
c) wild life
d) all of the above

8. Common energy source in village is
a) electricity
b) coal
c) biogas
d) wood and animal dung

9. Green house effect refers to
a) cooling of earth
b) trapping of UV rays
c) cultivation of plants
d) warming of earth

10. A cheap, conventional, commercial and inexhaustible source of energy is
a) hydropower
b) solar energy
c) wind energy.
d) thermal energy

11. Global warming will cause
a) raise in level of oceans
b) melting of glaciers
c) sinking of islands
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

VIII. Assertion and Reasoning:
1. Assertion: Rainwater harvesting is to collect and store rain water.
Reason: Rainwater can be directed to recharge the underground water source.
a. Both assertion and reason are true and reason is correct explanation of assertion.
b. Both assertion and reason are true but reason is not the correct explanation of assertion.
c. Assertion is true but reason is false.
d. Both assertion and reason are false.

2. Assertion: Energy efficient bulbs like CFL must be used to save electric energy.
Reason: CFL bulbs are costlier than ordinary bulbs, hence using ordinary bulbs can save our money.
a. Both assertion and reason are true and reason is correct explanation of assertion.
b. Both assertion and reason are true but reason is not the correct explanation of assertion.
c. Assertion is true but reason is false.
d. Both assertion and reason are false.

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