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Why do droplet sizes in a cloud not remain the same?

Answer and explanation

Correct answer: They undergo different collision, condensation, and evaporation conditions

Correct answer: A. Cloud droplets do not form at one identical time or in identical surroundings. Some droplets receive more water vapour and grow by condensation, while others may lose water by evaporation if the local air is less humid. Droplets also move with updrafts and downdrafts and can collide with one another. A collision may combine two droplets into a larger one; in colder clouds, freezing and interactions with ice particles can further change their size and form. Therefore, cloud microphysical conditions continually produce a range of droplet sizes. Option A is correct because it identifies the different processes acting on droplets. B is wrong because droplets form at different times and rates. C is wrong because clouds contain moving air. D is wrong because cloud droplets are liquid water. Memory cue: different histories inside a moving cloud create different droplet sizes.

Related tags

Cloud MicrophysicsDroplet SizeCondensationClouds And PrecipitationWater In The AtmosphereGeographyClass 12 Mcq

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