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Which event can occur when moist air comes in contact with a cold surface?

Answer and explanation

Correct answer: Condensation can form dew

Correct answer: A. Moist air contains water vapour. When that air touches a surface colder than the air, heat is removed from the air immediately next to the surface. If the air cools to its dew point, some water vapour changes into liquid droplets on the surface. These droplets are called dew when the conditions are suitable. Option A is correct because it describes condensation caused by contact cooling. Option B is wrong because a cold surface does not make land melt; melting requires sufficient heating. Option C is wrong because the contact of moist air with a cold surface cannot dry an entire ocean. Option D is wrong because air does not turn into stone; it may cool and cause water to condense. The exact result can depend on temperature, humidity, and the nature of the surface, but dew formation is the appropriate choice here. Memory cue: moist air touching a cold surface may reach the dew point and leave droplets.

Related tags

DewCold SurfaceCondensationMoist AirForms Of Condensation: DewFrostFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereGeography

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