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What is the combined effect of moisture and slight cooling during mist formation?

Answer and explanation

Correct answer: Tiny droplets can form and make air hazy

Correct answer: C. Mist forms when air contains enough moisture and cools sufficiently for some of that water vapour to condense, although the droplets may be less concentrated or visibility may be less reduced than in dense fog. The cooling brings the air closer to saturation. Once saturation is reached locally, water vapour changes into tiny suspended liquid droplets. These droplets scatter light and give the air a hazy or cloudy appearance. C is correct because it links moisture, cooling, condensation and reduced clarity in the proper sequence. A is wrong because moisture and cooling do not make air completely dry. B is wrong because the vapour changes into droplets; it does not vanish. D is unrelated to mist formation. A helpful distinction is that mist and fog are both made of suspended droplets, but mist is generally lighter and less obstructive to visibility. Memory cue: moist air plus gentle cooling can produce a veil of tiny droplets.

Related tags

MistMoistureCoolingCondensationForms Of Condensation: DewFrostFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereGeography

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