H2O - Life - Cycle

  Water Life Cycle The water  cycle  (known scientifically as the hydrologic cycle) refers to the continuous exchange of water within the hydrosphere, between the atmosphere, soil H2O, surface water, groundwater, and plants. Water moves perpetually through each of these regions in the H2O cycle consisting of following transfer processes: Evaporation from oceans and other water bodies into the air and transpiration from land plants and animals into air. precipitation from water vapor condensing from the air and reaching earth or ocean. Runoff from the land usually reaching the sea. Most H2O vapor over the oceans returns to the oceans, but winds over land at the same rate as runoff into the water vapor carry sea, about 36 Tt per year. Over land, evaporation and transpiration contribute another 71 Tt per year. Precipitation, at a rate of 107 Tt per year over land, has several forms: most commonly rain, snow, and hail, with some contribution from fog and dew. Condensed water ...