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Why can droplets remain small when condensation nuclei are very numerous?

Answer and explanation

Correct answer: Because available moisture is distributed over many tiny surfaces

Correct answer: A. Condensation nuclei are tiny particles such as dust, salt, or smoke on which water vapour can begin to condense. If the available moisture is associated with a limited number of nuclei, each developing droplet may receive more water and become relatively larger. When nuclei are very numerous, the same amount of moisture is shared among many particles. Consequently, many droplets form, but each one may remain small. Option B is wrong because nuclei do not destroy water vapour; they provide surfaces that help condensation begin. Option C is wrong because clouds have temperature, and temperature strongly affects condensation and droplet growth. Option D is unrelated and scientifically incorrect. Thus A correctly explains the relationship between numerous nuclei and small average droplet size. Memory cue: “more nuclei, more droplets, less water per droplet,” although actual size also depends on moisture supply and cloud processes.

Related tags

Condensation NucleiDroplet SizeCloud MicrophysicsCondensationClouds And PrecipitationWater In The AtmosphereGeographyClass 12 Mcq

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