The process of evaporation has a vital role in the water cycle because when water particles evaporate thy leave behind all the impurities or pollutants.Thus,water vapour is the purest form of water.
Evaporation is the process by which water converts from liquid to vapor form. The conversion to vapor ensures water is transferred from land and water bodies into the atmosphere, according to Michigan Technological University. When water is heated, it evaporates after the molecules move and vibrate so quickly, they escape into the atmosphere as water vapor molecules. Evaporation is one of two forms of vaporization, the other being boiling. For evaporation to occur, energy is required as it proceeds faster at higher temperature, and higher flow rates between the gaseous and liquid phase, and, in liquids, in cases of lower surface tension on water. Surface tension is the elastic tendency of a fluid that allows insects to float on water and have tension that allows for bubbles formation.
Evaporation's Integral Role
Water on the planet is constantly getting recycled in what’s called the water cycle (or hydrological cycle), and evaporation is vital in that. Water from oceans, rivers, swamps, lakes, plants and even humans is converted to vapor in the water cycle, according to NASA’s Center for Educational Technologies. The sun provides solar energy that powers the evaporation process. The heat soaks up the moisture from soil in gardens, farms, oceans, and lakes. As a result, the water levels decrease due to exposure of heat from the sun, according to National Geographic. Though water levels in water bodies appear to decrease due to the sun’s heat, the escaped molecules don’t disappear. They stay in the atmosphere, and affect humidity and influence the moisture amounts in the air. Regions with high temperatures and large water bodies are humid due to water evaporating and remaining in the air as vapor. Evaporation also helps in cloud formation. Afterwards the clouds release the moisture as precipitation. In plants, transpiration is water evaporation from plants. In transpiration, water or minerals are carried from the roots, to the underside pores on the leaves in a plant. From these pores water evaporates into the atmosphere and that helps keep a plant cool, during hot weathers.