What is the main source of water on earth?, Rain, Snow, Water from the mountains comes down in the form of______, vapors, rivers, What do we dig to get underground water?, well, ocean, Water is cleaned by______, boiling, water filter , both, none, Boling water kills the ______ present in it., taste, germs, We collect rainwater in ____________, spoon, cups, drums, plastic bag, Water is very useful. We must ________ it., waste, save, We need ________ for putting out fire., juice, water, ice, paint, Drinking dirty water makes us _____, happy, healthy, sick, smart, We should always drink _____________ water., salty, clean, sandy, dirty.

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