Rain water rises untouched out of the land and deep sea and gathers in the sky, where it changes form, and then comes down to earth to bathe the dry tiny particles of dust layers and all that lies buried under it. Then it returns to the place of its origin. Science textbooks indicate that water vapours from the rivers and ocean rise up to the sky due to the intense heat. They assume the form of clouds and after condensation drop down as rain. The water flows back through rivers to the seas and oceans.