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Where does fog mainly form?

Answer and explanation

Correct answer: In air near the ground

Correct answer: D, in air near the ground. Fog is made of very small water droplets suspended in air close to the Earth's surface. It forms when air near the ground cools to its dew point or becomes saturated, so some water vapour condenses. Fog is therefore similar to a cloud, but its base is at or very close to the ground and it reduces visibility. A is wrong because the Earth's centre is far below the atmosphere and cannot be the place where fog forms. B is wrong because fog is not restricted to areas below sea level; it can occur in many low-lying or suitable locations. C is wrong because fog is not limited to deserts. D is correct because the defining location of fog is near-surface air. Memory cue: a cloud in the sky, fog near the ground; the physical process is condensation in both cases.

Related tags

GeographyFogCondensationVisibilityForms Of Condensation: DewFrostAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereClass 12 Mcq

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