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Dew and rain both involve water drops, yet why are they different?

Answer and explanation

Correct answer: Dew forms by surface condensation while rain falls from clouds

Correct answer: A. Dew is a form of surface condensation. During suitable conditions, a surface cools to or below the dew point, and nearby water vapour condenses directly into small liquid drops on grass, leaves, or other objects. Rain is precipitation: cloud droplets or ice particles grow within a cloud and then fall through the atmosphere to the ground. Thus both contain liquid water, but their place and process of formation differ. B is wrong because dew forms on surfaces rather than falling from clouds. C is wrong because rain develops in clouds, although it may change while falling. D is wrong because the two processes are not identical: dew is deposited locally at a surface, while rain is falling cloud precipitation. Memory cue: “Dew stays on the surface; rain falls from the sky.”

Related tags

DewRainSurface CondensationPrecipitation FormsHumidityEvaporationAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereGeography

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