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The microscopic particle present in the atmosphere upon which water vapour deposits to form cloud droplets is called what?

Answer and explanation

Correct answer: Condensation nuclei

The correct answer is B, condensation nuclei. Air normally contains tiny particles such as dust, sea-salt particles, smoke, and other aerosols. Water vapour can collect on suitable particles when air cools and reaches saturation. The particles provide a surface on which water begins to condense, producing very small cloud droplets. Many droplets together form a cloud. A, vapour centre, is not the accepted scientific term for these atmospheric particles. C, a solid solute, is a substance dissolved in a solid or other material and does not describe the atmospheric seed of a cloud droplet. D, an air pocket, is simply a volume of trapped air, not a condensation surface. A useful distinction is that condensation nuclei are particles, whereas the droplets forming around them are liquid water. Memory cue: nuclei are the tiny seeds of clouds.

Related tags

Condensation NucleiCloud FormationWater CycleHydrological CycleThe Living WorldBiologyClass 11 Mcq

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