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If grass surface cools to the dew point at night which form is most likely to develop?

Answer and explanation

Correct answer: Dew

Direct answer: C, dew. The dew point is the temperature at which air becomes saturated with water vapour under the given conditions. When grass cools to that temperature, water vapour changes into liquid droplets on the grass blades. This is surface condensation and is called dew. A, frost, would require the deposited water to be in the form of ice, generally with the surface at or below freezing. B, fog, consists of droplets suspended in air near the ground rather than mainly deposited on grass. D, mist also consists of suspended droplets and reduces visibility, but it is not the name for liquid droplets collected on a surface. Memory cue: dew is wetness on a surface; fog and mist float in the air; frost is icy.

Related tags

DewDew PointSurface CondensationGrassForms Of Condensation: DewFrostFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereGeography

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