How does rain form?

Answer 1

The oceans are the main source of rain, but lakes and rivers also contribute to it. The sun's heat evaporates the water. It remains in the air as an invisible vapour until it condenses, first into clouds and then into raindrops. Condensation happens when the air is cooled.

Air cools either through expansion or by coming into contact with a cool object such as a cold landmass or an ice-covered area. When air passes over a cold object, it loses heat and its moisture condenses as fog, dew, or frost. Air also cools as it rises and expands. The water vapour in the cooling air condenses to form clouds and, sometimes, rain.

Rain is liquid precipitation , as opposed to other kinds of precipitation such as snow , hail and sleet. Rain requires the presence of a thick layer of the atmosphere to have temperatures above the melting point of water near and above the Earth's surface. On Earth, it is the condensation of atmospheric water vapor into drops of water heavy enough to fall, often making it to the surface. Two processes, possibly acting together, can lead to air becoming saturated leading to rainfall: cooling the air or adding water vapour to the air. Virga is precipitation that begins falling to the earth but evaporates before reaching the surface; it is one of the ways air can become saturated. Precipitation forms via collision with other rain drops or ice crystals within a cloud. Rain drops range in size from oblate, pancake-like shapes for larger drops, to small spheres for smaller drops.

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Answer 2

Rain is the one who produces fresh water that is used for irrigation. Rain is formed when the warm air evaporates, as the warm air reaches the sky it will begin to cool and turn into water vapor then condensation will take place.