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Why do cloud droplets not immediately fall because of gravity?

Answer and explanation

Correct answer: They are very small and light

Correct answer: A, they are very small and light. Gravity acts on every water droplet, but a tiny cloud droplet has very little mass and a large effect from air resistance compared with its weight. Gentle upward air currents can therefore keep it suspended for some time. As droplets collide and combine, they become larger and heavier; when their downward fall is no longer balanced by air resistance and upward motion, precipitation begins. A is correct because it gives the physical reason for suspension. B is wrong because cloud droplets are water, not stone. C is wrong because gravity acts throughout the atmosphere. D is wrong because a droplet need not be physically attached to Earth to be affected by gravity. Memory cue: tiny drop plus air resistance means suspension; bigger drop means falling.

Related tags

Cloud DropletsGravityAir ResistanceClouds And PrecipitationWater In The AtmosphereGeographyClass 12 Mcq

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