Page 2 - 3.Home Assignment-(Obj & Subj) Water Harvesting, Coal and Petroleum

(c) Katas
(d) Bandharas

Q.7 It is important to make small check-dams across the flooded gullies 1
because they –
(i) hold water for irrigation
(ii) hold water and prevent soil erosion
(iii) recharge ground water
(iv) hold water permanently
(a) (i) and (iv)
(b) (ii) and (iii)
(c) (iii) and (iv)
(d) (ii) and (iv)

Q.8 Pick the right combination of terms which has no fossil fuel. 1
(a) Wind, ocean and coal
(b) Kerosene, wind and tide
(c) Wind, wood, sun
(d) Petroleum, wood, sun

Q.9 Which gas is formed, when fossil fuels are burnt in insufficient air - 1
(oxygen)?
(a) Carbon dioxide
(b) Carbon monoxide
(c) Both CO2 and CO
(d) Neither CO2 nor CO

Q.10 Ground water will not be depleted due to - 1
(a) Afforestation
(b) Thermal power plants
(c) loss of forest, and decreased rainfall
(d) cropping of high-water demanding crops

Subjective

Q. Questions Mark Level
NO
1. ‘’Burning of fossil fuels results in global warming”. Justify this 1 E
statement.

2. Fire-wood is our conventional fuel. List any four reasons for 1 E
replacing it by alternate sources of energy.

3. What are fossil fuels? How are they formed? 3 Av

4. How can you as an individual contribute or make a difference to the 3 Av

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