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What can be the most common reason when fog dissipates?

Answer and explanation

Correct answer: Surface warming and air becoming unsaturated

Direct answer: A, surface warming and air becoming unsaturated. Fog consists of tiny liquid droplets suspended in air. When the ground and the air near it warm, the air’s capacity to hold water vapour increases. The relative humidity can then fall below saturation, so the droplets gradually evaporate back into invisible water vapour. Wind or mixing with drier air can also help, but the option correctly identifies the basic warming-and-unsaturation mechanism. B is wrong because water vapour does not normally become solid rock; that is unrelated to fog. C is wrong because gravity does not make visibility disappear or remove fog in this way. D is scientifically meaningless: condensation nuclei are tiny particles that help droplets form, not bodies that turn into oceans. The important distinction is that fog dissipation is usually a result of evaporation, mixing, or both, not a new kind of condensation. Memory cue: warming raises vapour-holding capacity, droplets evaporate, and fog clears.

Related tags

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

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