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Through which process does water vapour mainly enter the air?

Answer and explanation

Correct answer: Evaporation

Direct answer: B, evaporation. Evaporation is the process in which liquid water at a surface changes into invisible water vapour and mixes with the air. Heat from the Sun and the surrounding environment supplies energy for this change. Oceans, lakes, rivers, wet soil, and other exposed water surfaces contribute moisture in this way. Condensation is the reverse direction: vapour changes into liquid droplets, so option A is wrong. Freezing changes liquid water into solid ice, so option C is wrong. Deposition is a direct change from gas to solid, such as vapour forming ice under suitable conditions, so option D is wrong. Option B is correct. Plants also add vapour through transpiration, but among these choices evaporation is the correct main process. Memory cue: liquid water escaping into air is evaporation.

Related tags

EvaporationWater VapourWater CycleAtmospheric MoistureHumidityAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereGeography

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