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Which process plays the main role in cloud formation?

Answer and explanation

Correct answer: Condensation

Correct answer: C, condensation. Water first evaporates from oceans, lakes, soil, and vegetation and enters the atmosphere as invisible vapour. Moist air rises, expands, and usually cools. When it cools enough, the vapour changes into tiny liquid droplets or ice crystals around small particles in the air. A large collection of these droplets or crystals is seen as a cloud. Thus evaporation supplies moisture, but condensation is the main process that changes invisible vapour into visible cloud particles. A is therefore not the best answer to the question about cloud formation. B is too general and does not name the phase change involved. D is the change from solid ice to liquid water and does not form clouds. C is correct. Memory cue: evaporation loads the atmosphere with vapour; cooling and condensation make the cloud visible.

Related tags

GeographyCloudsCondensationWater-CycleHumidityEvaporationAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereClass 12 Mcq

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