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Which form is more clearly present in air near the ground rather than on the ground surface?

Answer and explanation

Correct answer: Fog

Correct answer: C, fog. Fog is made of countless tiny water droplets suspended in the air close to the ground. It is therefore an atmospheric, near-surface form of condensation and can make distant objects difficult to see. Dew is different: it consists of liquid droplets deposited directly on cool surfaces such as grass, leaves, or roofs. Frost is also found on surfaces, but it consists of ice crystals formed when the surface is sufficiently cold. Frozen dew forms when already-existing liquid dew freezes later. Thus, the key question is where the moisture is located: droplets floating in the air indicate fog, while water or ice attached to a surface indicates dew, frost, or frozen dew. Option A is wrong because dew lies on a surface. Option B is wrong because frost is visible as surface ice crystals. Option C is correct because fog occupies the air near the ground. Option D is wrong because frozen dew is also a surface deposit. Memory cue: “Fog floats; dew and frost decorate surfaces.”

Related tags

GeographyFogCondensationNear-Ground-AirForms Of Condensation: DewFrostAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereClass 12 Mcq

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