The circulation of water between the surface of the earth and its atmosphere is driven by energy from the sun. water vapor is lost from seas, rivers, and lakes by evaporation, and from plants by transpiration. The rising vapor cools and condenses in to droplets of water which from clouds. Carried by the wind, clouds continue to absorb water until saturated, when the water droplets fall as rain, hail or snow. In this way water is redistributed around the planet. Thank you.