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Why is cooling of air important in cloud formation?

Answer and explanation

Correct answer: Water vapour can condense when cooled

Correct answer: A, water vapour can condense when air cools. Warm air can contain water vapour. As moist air cools, its capacity to hold vapour decreases; when it reaches saturation, excess vapour changes into tiny liquid droplets or ice crystals. These suspended particles collect around small condensation nuclei and form clouds. Further growth may later produce precipitation. B is wrong because cooling does not destroy water vapour; it changes some of it into liquid or solid water. C is impossible because air does not become rock. D is wrong because cooling can help cloud and precipitation formation, although it does not guarantee rain. Memory cue: cooling leads toward saturation, and saturation allows condensation.

Related tags

CoolingCloud FormationCondensationWater VapourClouds And PrecipitationWater In The AtmosphereGeographyClass 12 Mcq

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