Chemistry
What is water cycle? State two important roles of water cycle in nature.
Water
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Answer
The change of water from one form to another in nature, which results in its continuous circulation from earth's surface to the atmosphere and from the atmosphere back to the earth's surface is called water cycle.
Two important roles of water cycle in nature :
- Water cycle helps in restoring the lost water from the earth's surface and maintaining the balance of underground water.
- The rain water is very important because agricultural production depends mainly on rains in many parts of the world.
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Related Questions
Answer the following questions in brief:
(a) In which form is water present in the atmosphere?
(b) Which source of water contains the highest concentration of salt in it ?
(c) What possible impurities does rain water contain?
(d) What is water table?
Find the percentage of water in the following:
(a) Rice and wheat grains
(b) Eggs
(c) Tomatoes
(d) Bread
(e) Watermelon
Give reason:
Rain water is considered the purest form of natural water.
Give reason:
Spring water is pure enough for drinking but unsuitable for laboratory use.