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What is the role of condensation nuclei in cloud formation?

Answer and explanation

Correct answer: They provide a base for droplet formation

Direct answer: A, condensation nuclei provide a surface or base on which water vapour can condense. The atmosphere contains tiny particles such as dust, salt, smoke, or other aerosols. When moist air cools sufficiently, water vapour gathers around these particles and forms very small water droplets or ice crystals. Many such droplets together make a cloud. B is wrong because nuclei help cloud particles form rather than destroy clouds. C is wrong because nuclei do not remove all air; they are only tiny suspended particles. D is wrong because they have no special role in preventing clouds from blocking sunlight. Memory cue: a condensation nucleus is a tiny seed for a cloud droplet; it is not the whole cloud.

Related tags

Condensation-NucleiCloud-FormationWater-VapourAerosolsClouds And PrecipitationWater In The AtmosphereGeographyClass 12 Mcq

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