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Why is cloud formation incomplete without water vapour?

Answer and explanation

Correct answer: Because clouds mainly consist of tiny water droplets or ice particles

Answer: A. A cloud forms when moist air rises or is otherwise cooled. Cooling reduces the air’s ability to hold water vapour, and the vapour changes into tiny liquid droplets or, at sufficiently low temperatures, ice crystals. These droplets and crystals remain suspended in the air and scatter light, making the cloud visible. Water vapour is therefore the essential raw material for ordinary cloud formation. B is wrong because nitrogen is a major atmospheric gas but is not the visible material of clouds. C is wrong because clouds are not metallic. D is wrong because clouds develop in the atmosphere. A useful sequence is: water evaporates, moist air cools, condensation occurs, and droplets or ice crystals form a cloud.

Related tags

Cloud FormationWater VapourCondensationWater CycleAtmosphereAccounting InformationIntroduction To AccountingAccountancy

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