Explain water cycle.
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The continuous interchange of the forms of water on Earth is called the water cycle or the hydrological cycle. It involves the three different processes of evaporation, condensation and precipitation. Water from the surface of the Earth evaporates on heating and changes into water vapour (from a liquid to gas). The water vapour that rises up in the air gets cooled by the low temperature there and condenses (changes back to the liquid state) to form clouds, droplets of water and ice crystals. When the cloud particles get too heavy to remain suspended, they fall back to the Earth as precipitation. Precipitation occurs in the form of hail, rain, snow, sleet, fog, mist and dew.
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The continuous interchange of the forms of water on Earth is called the water cycle or the hydrological cycle. It involves the three different processes of evaporation, condensation and precipitation. Water from the surface of the Earth evaporates on heating and changes into water vapour (from a liquid to gas). The water vapour that rises up in the air gets cooled by the low temperature there and condenses (changes back to the liquid state) to form clouds, droplets of water and ice crystals. When the cloud particles get too heavy to remain suspended, they fall back to the Earth as precipitation. Precipitation occurs in the form of hail, rain, snow, sleet, fog, mist and dew.
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The movement of water is continuously taking place from Earth's surface Earth's atmosphere. The process of evaporation, condensation and rainfall is a continuous process. Due to the sun's heat, the water on the earth surface in is continuously evaporated. Since the water vapour is lighter than air, it rises high in the atmosphere. Due to cool temperatures at the Heights, the water vapour condenses forming fine droplets of water. These droplets later form clouds. When small droplets of water become heavier and bigger, they descend and down on the earth in the form of rain. Rainwater mixes with different water bodies. The snowbound region also so melting of Ice and glaciers. This water also eventually mixes with ocean water. In this way water moves in the cyclic manner, which is known as water cycle.
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