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Why is dew found on leaves during a cold morning?

Answer and explanation

Correct answer: Water vapour condenses on a cold surface

Direct answer: C is correct. During a clear or cool night, leaves lose heat and their surfaces become colder. If the surface reaches the dew point, nearby air cannot keep all its water vapour. The excess vapour changes into tiny liquid droplets on the leaves; these droplets are called dew. A is wrong because leaves do not manufacture the water droplets in this process. B is wrong because wind does not colour water and strong wind may even reduce the chance of droplets remaining on a surface. C is correct because it describes cooling followed by condensation. D is wrong because flying soil has no role in forming dew. Dew is liquid water; if the surface is below freezing, a related deposit called frost may form instead. Memory cue: cold surface plus water vapour equals dew.

Related tags

GeographyDewCondensationDew-PointForms Of Condensation: DewFrostFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereClass 12 Mcq

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