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Droplets joining and becoming larger in clouds is necessary for what?

Answer and explanation

Correct answer: For rain formation

Correct answer: A, rain formation. A cloud may contain numerous tiny droplets that are too small to fall because air currents can keep them suspended. When droplets collide and join, a process called coalescence, their size and mass increase. Once a drop becomes sufficiently large, gravity makes it fall faster than the surrounding upward air can support it. It then reaches the ground as rain if it remains liquid and does not evaporate on the way. This is one important route to rainfall in warm clouds; colder clouds can also involve ice-crystal processes. B, C, and D have no connection with droplets joining in clouds: the Sun is not formed by cloud water, soil formation is a surface process, and air is not ended by precipitation. Memory cue: coalescence means “come together”; bigger drops can fall as rain.

Related tags

CoalescenceRain-FormationDropletsPrecipitationClouds And PrecipitationWater In The AtmosphereGeographyClass 12 Mcq

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