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What is the main similarity between fog and cloud?

Answer and explanation

Correct answer: Both may consist of tiny water droplets or ice crystals

Correct answer: A. Both fog and cloud form when moist air cools sufficiently for water vapour to condense. The resulting tiny liquid droplets, and in suitably cold conditions ice crystals, remain suspended in the atmosphere. The main difference is usually location: a cloud is above the ground at some height, while fog is a cloud-like mass at or very near the ground and reduces visibility there. B is wrong because dust may sometimes help condensation as nuclei, but fog and clouds are not made only of dust. C is wrong because water vapour is the starting material for condensation. D is wrong because clouds and fog occur in many environments, not only deserts. Memory cue: fog may be described as a cloud near the ground; condensation is the similarity and height is the difference.

Related tags

FogCloudCondensationIce CrystalsForms Of Condensation: DewFrostAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereGeography

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