C. Answer these questions. 1. Why is water essential for life? 2. List five sources of water. 3. What are the different means of irrigation used in India? 4. How are dams useful to us? D. Think and answer. What will happen to the groundwater reserves in an area a. rains heavily? b. does not rain much?
Answers
Explanation:
- Without water living beings will die
- river,lake,sea,well,ocean, rainwater
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Ans 1 Liquid water is an essential requirement for life on Earth because it functions as a solvent. It is capable of dissolving substances and enabling key chemical reactions in animal, plant and microbial cells.
Ans 2 The sources of water are - Lakes, Rains, Ponds, Wells and Glaciers.
Ans 3 Canals are a means of irrigation of almost 40% of agricultural land in India. ... This water is taken through canals to irrigate the land in far away areas. Canals are used for irrigating the land in Punjab, Haryana, Delhi, Uttar Pradesh, Bihar and Northern – Rajasthan.
Ans 4 Dams are built to provide water for human consumption, for irrigating arid and semiarid lands, or for use in industrial processes. ... Many dams are built for more than one purpose; for example, water in a single reservoir can be used for fishing, to generate hydroelectric power, and to support an irrigation system.
Ans 5 In an area where it rains heavily more water will seep into the ground and raise the groundwater reserves. This will increase the water supply in an area. ... This will lead to water shortage.
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