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In cloud formation, water vapour first changes into what?

Answer and explanation

Correct answer: Into tiny water droplets or ice particles

Answer: B. Cloud formation begins when moist air rises, cools and approaches saturation. Water vapour then changes into tiny liquid droplets through condensation, or into ice particles when temperatures are sufficiently low through deposition or freezing-related processes. These particles remain suspended in the atmosphere and together become visible as a cloud. Many droplets form around tiny condensation nuclei such as particles already present in the air, but the vapour does not turn into dust itself. A is therefore wrong: dust particles may provide surfaces, but they are not the product. C is wrong because water vapour does not become oxygen. D is not a substance into which vapour changes; pressure is a condition affecting air. Memory cue: clouds are visible collections of tiny droplets or ice particles.

Related tags

GeographyCloud FormationCondensationClouds And PrecipitationWater In The AtmosphereClass 12 Mcq

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