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If there were no water vapour in the atmosphere, which process would be directly affected?

Answer and explanation

Correct answer: Cloud formation

Direct answer: B, cloud formation. Water vapour is the gaseous form of water present in air. When moist air rises or cools, it may reach saturation. The vapour then changes into tiny liquid water droplets or, at sufficiently low temperatures, ice particles. A large collection of these droplets and ice particles forms a cloud. Therefore, if the atmosphere contained no water vapour, there would be no moisture available for condensation and ordinary cloud formation could not occur. A is incorrect because the colour of rocks is mainly related to their minerals, weathering and surface conditions, not directly to atmospheric water vapour. C is incorrect because Earth’s rotation is controlled by its mass distribution and angular momentum. D is incorrect because the magnetic field is associated mainly with processes in Earth’s interior. Memory cue: vapour first, condensation next, cloud after that.

Related tags

GeographyWater VapourCloud FormationClouds And PrecipitationWater In The AtmosphereClass 12 Mcq

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