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What can cause dew on a surface and mist in the air to form together?

Answer and explanation

Correct answer: Cooling of both the surface and lower air in moist conditions

Direct answer: A. Condensation occurs when moist air or a surface cools to its dew point, the temperature at which air becomes saturated and water vapour begins to form liquid water. If the ground cools strongly, water can condense on grass or other surfaces as dew. If the nearby lower air also cools and contains enough moisture, some vapour condenses into tiny suspended droplets, producing mist. Thus the same general process—cooling and condensation—can occur in two different locations: on the surface and within the air. B is wrong because dry air lacks sufficient water vapour and a hot surface discourages condensation. C is wrong because water vapour is needed for both forms. D is wrong because an earthquake is not the atmospheric cause. Memory cue: same cooling, different location—surface droplets are dew; airborne droplets are mist.

Related tags

DewMistCondensationMoistureCoolingForms Of Condensation: DewFrostFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The Atmosphere

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