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Which condition commonly leads to dew formation?

Answer and explanation

Correct answer: Surface cooling to dew point at night

Correct answer: A. Dew forms when a surface cools to the dew-point temperature and the air or thin layer next to the surface becomes saturated. Water vapour then condenses into small liquid droplets on grass, leaves, roofs, or other exposed surfaces. Clear, calm nights often favour this process because the ground loses heat by radiation and there is little wind to mix warmer air downward. B is generally unfavorable because strong afternoon heating raises surface temperature and increases the capacity of air to hold vapour. C is usually dry and prevents local saturation, while D has no direct role in ordinary dew formation. Dew is liquid water; if the surface temperature is below freezing, a related deposit may be frost. Memory cue: dew is condensation on a cool surface, commonly after a clear night.

Related tags

GeographyDewDew PointCondensationForms Of Condensation: DewFrostFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereClass 12 Mcq

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