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If fog is dense only over a river and not on nearby land what is the most suitable reason?

Answer and explanation

Correct answer: The river is a local moisture source and air above it is cool

Correct answer: C. Fog is a cloud at or very near the ground, formed when air contains enough moisture and cools to the condensation point. A river supplies a nearby source of moisture through evaporation. If the air above the river becomes sufficiently cool, that moisture condenses into many tiny suspended droplets, making fog dense over the water. A is wrong because a river does not block vapour; it can add moisture. B is false because air is present over land. D states the opposite of the observed process. A useful clue is the combination of a local moisture source and cooling, not merely the presence of water.

Related tags

River FogLocal MoistureCoolingCondensationForms Of Condensation: DewFrostFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereGeography

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