define in short for class 7 water management and states of water
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I dont know about water management but water is exist in all three dtates pf matter
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About 71% of the earth’s surface is filled with water. But out of this, a very small amount is available for the human use.
If a bucketful of water shows the total water on the earth, then a mug of water shows the total freshwater available on the earth. Out of this, a glass of water shows the water which is available as groundwater. About one-fourth spoonful of water shows all the water available in lakes and rivers of the world.
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