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If cloud droplets remain very small, why do they not immediately become rainfall?

Answer and explanation

Correct answer: They can remain suspended in air

Correct answer: A, they can remain suspended in air. A cloud contains extremely small water droplets or ice particles. Because each droplet is tiny and has little mass, air resistance and gentle upward air movements can keep it floating instead of allowing it to fall rapidly. For rainfall to begin, droplets generally need to grow through collision and coalescence, or through processes involving ice crystals, until they become large and heavy enough for gravity to overcome the supporting air movements. Option A correctly states this basic reason. Option B is wrong because cloud droplets do not turn into rocks. Option C is wrong because droplets do not destroy water vapour; water continually changes between vapour and liquid forms. Option D is wrong because clouds may block or diffuse sunlight, but that is unrelated to why tiny droplets remain aloft. Memory cue: tiny and light droplets float; large and heavy drops fall as rain.

Related tags

Cloud-DropletsRain-FormationPrecipitationSuspensionClouds And PrecipitationWater In The AtmosphereGeographyClass 12 Mcq

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