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Why does the water spilled on the floor disappear after some time?
Why is ocean water not suitable for domestic use?
Mention two main functions of water for living organisms.
During winters why do we see more fog in close areas where there are lots of trees?
How does the failure of rainfall affect people on the earth?
What is rainwater harvesting? Describe the method of rainwater harvesting.
How does heavy rain affect us?
What is meant by conservation of water? Suggest three methods to conserve water.
The process of condensation plays an important role in bringing water back to the surface of earth. Explain how?