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What is the similarity between dew and frost?

Answer and explanation

Correct answer: Both form from water vapour

Correct answer: A, both are formed from atmospheric water vapour. First, remember that air contains water vapour, which is an invisible gas. When air or a surface cools sufficiently, the vapour changes into water or ice; this change is called condensation or deposition. Dew forms mainly as liquid water droplets on cool surfaces when the temperature reaches the dew point. Frost forms when the surface is at or below freezing and ice crystals develop. Therefore, their common link is water vapour and cooling, although their physical states differ. A is correct because both originate from atmospheric moisture. B is wrong because dew and frost can form on land, plants, vehicles, and other surfaces, not only at sea. C is wrong because neither is a dust storm. D is wrong because neither is ordinary rainfall; dew and frost form on surfaces. Memory cue: same source, different state—dew is liquid, frost is ice.

Related tags

DewFrostWater VapourCondensationForms Of Condensation: DewFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereGeography

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