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When can closeness to an open water surface help dew formation?

Answer and explanation

Correct answer: When it increases moisture in local air

The correct answer is A: an open water surface can help when it increases moisture in the nearby air. Dew forms when a surface cools to its dew point and water vapour condenses on that surface as liquid droplets. A nearby lake, pond, or wet surface may supply moisture through evaporation, making the local air more humid. If the exposed ground or objects then cool sufficiently, the increased moisture makes dew formation more likely. Water proximity alone is not enough; suitable cooling and a surface reaching the dew point are also needed. B is wrong because completely dry air reduces the supply of vapour. C is wrong because infinite temperature would prevent condensation. D is wrong because water does not make a surface volcanic. Memory cue: dew needs a cool surface plus nearby moisture.

Related tags

DewWater BodyMoisture SourceForms Of Condensation: DewFrostFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereGeographyClass 12 Mcq

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