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The water cycle is critical not only to weather, but to life on earth. Rain is necessary for the survival of plants and humans. Condensation is necessary for cloud formation. Evaporation is necessary to cooling and keeping a good balance of water vapor in the air.
Water cycle, also called hydrologic cycle, cycle that involves the continuous circulation of water in the Earth-atmosphere system. Of the many processes involved in the water cycle, the most important are evaporation, transpiration, condensation, precipitation, and runoff. Although the total amount of water within the cycle remains essentially constant, its distribution among the various processes is continually changing. zoom_in.