Question

2
to purify water
to conserve water
3. Wi
4. Wi
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3. Why are check dams built?
for recreation
to cause rainfall
4. From where can rainwater be harvested?
from clouds
from rivers from wells from rooftops
5. What are the three states of water?
ice, water and snow
ice, water and water vapour
water, dew and rain
Show, hail and water vapour
Answer the following questions in one sentence.
1. Why is the Earth called the blue planet?
2. What percentage of water is available for use by land animals, plants and
human beings?
3. Name two sources of freshwater.
14. What is evaporation?
5. What is loss of water by plants called?
6. What is rainwater harvesting?
III Answer the following questions in two sentences.
1. Why is a cyclone very destructive?
2. How does water vapour reach the upper regions of the atmosphere?
3. List three benefits of rainwater harvesting.
4. Why is there a danger of waterborne diseases breaking out during floods?
5. What is groundwater?
IV
Answer the following questions in about four to five sentences.
1. Explain water cycle.
2. What are the effects of a drought and a flood on a region?
3. How do check dams increase the groundwater level in a region?
4. Explain in your own words what happens to rainwater.
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Answer 1

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