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Which difference between frost and fog is correct?

Answer and explanation

Correct answer: Frost is an icy deposit on a surface and fog is a group of droplets in air

Correct answer: A. Frost and fog are both related to atmospheric moisture, but their physical form and location are different. Frost is a solid deposit of ice crystals on a cold surface. It may form when dew freezes or when water vapour deposits directly as ice. Fog is made of very small liquid water droplets suspended in air near the ground; these droplets reduce visibility by scattering light. Option A is correct because it identifies both the surface location and the solid or suspended form. Option B is wrong because frost is not dust and fog is not rock. Option C is wrong because frost is solid ice, while fog generally consists of liquid droplets. Option D is wrong because neither is defined as hot air. A useful comparison is: frost is seen on a surface, whereas fog surrounds objects in the air. Memory cue: frost is a frozen surface deposit; fog is a cloud at ground level.

Related tags

FrostFogDifferenceIce CrystalsForms Of Condensation: DewAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereGeography

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