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Which combined effect works when steam-like mist forms over a warm lake under cold air?

Answer and explanation

Correct answer: Evaporation from warm water and condensation in cold air

Correct answer: D. A warm lake supplies heat and water vapour to the air immediately above its surface. When colder air moves over the lake, the added moisture may cool rapidly and the air can approach saturation. Water vapour then condenses into many tiny droplets suspended above the water, creating a steam-like mist. The visible appearance is not actual smoke; it is condensed water. A is wrong because moisture from the lake is central to the process. B may describe dust but cannot explain the water droplets. C has no necessary role in this atmospheric formation. Therefore the combined sequence in D is essential: evaporation from warm water followed by condensation in cold air. Memory cue: warm water supplies vapour; cold air reveals it as mist.

Related tags

Steam FogWarm LakeCold AirEvaporationCondensationForms Of Condensation: DewFrostFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The Atmosphere

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