Ground Water

Q.

______________is the main natural source of water.

Q. Which of the following are advantages of groundwater?

1. It recharges wells.
2. It supports aquatic life e.g. fishes.
3. It provides moisture for natural vegetation.
4. It is a source of potable water in some rural areas.

Q. What are the advantages of using ground water over surface water?

1. Water is not much contaminated.
2. Surface water can get polluted by sanitary works.
3. Water is not breeding ground for mosquitoes.
4. Easily available.

Q.

Question 19
Groundwater will not be depleted due to

(a) afforestation
(b) thermal power plants
(c) loss of forest and decreased rainfall
(d) cropping of high water demanding crops

Q.

Khadins are used in Rajasthan to:
(a) hold water for irrigation
(b) recharge groundwater
(c) promote soil erosion
(d) trap wild animals

Q.

What are the advantages of water stored in ground over water spread on surface?

1. Ground water gets heated up since its below earth surface which kills the microorganisms.

2. Unlike surface stagnant water, ground water doesn't becomes a breeding ground for mosquitoes.

3. (a) and (b) above.
4. None of the above

Q.

Question 19
Groundwater will not be depleted due to

(a) afforestation
(b) thermal power plants
(c) loss of forest and decreased rainfall
(d) cropping of high water demanding crops

Q.

Question 31
(a) Locate and name the water reservoirs in figures given below.

(b) Which has an advantage over the other and why?

Q.

Find the odd one out. Give a reason for your answer.

1. Spring water

2. Potable water

3. Well water

4. River water

Q. Which aspects of farming practices were regulated in the context of Hiware Bazar to improve the water conservation?

Q.

Groundwater 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 crops

Q.

Question 31
(a) Locate and name the water reservoirs in figures given below.

(b) Which has an advantage over the other and why?

Q. Calculate the pressure exerted by water at the bottom of a lake of depth 6 m. (Density of water $=1000kg{m}^{-3},g=10m{s}^{-2})$.

1. $2\times {10}^{4}Pa$
2. $4\times {10}^{4}Pa$
3. $8\times {10}^{4}Pa$
4. $6\times {10}^{4}Pa$

Q.

Which of the following is not a cause for the depletion of underground water level?

1. Loss of vegetation cover

2. Open defecation

3. High water demanding crops

4. Pollution from industrial effluents

Q. Answer the following:
Locate and name the water reservoirs in figures (a) and (b).

Q.

Question 31
(a) Locate and name the water reservoirs in figures given below.

(b) Which has an advantage over the other and why?

Q. An input device that converts data punched into paper lape into a binary format is?

1. None of the above
2. Page reader
3. Paper tape punch
4. Paper tape reader
5. Card punch

Q.

Animals can get

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when humidity is too low in the atmosphere.

Q.

Question 31
(a) Locate and name the water reservoirs in Figures given below.

(b) Which has an advantage over the other and why?