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What is the invisible moisture present in air called?

Answer and explanation

Correct answer: Water vapour

Correct answer: C, water vapour. Water vapour is water in its gaseous state, and individual vapour molecules are too small to be seen with the unaided eye. The amount of this invisible moisture in air contributes to humidity. If the air cools and vapour condenses, visible forms such as dew, fog, clouds, or droplets may appear. C is correct because it names the gaseous moisture itself. A is wrong because dew consists of visible liquid droplets deposited on cool surfaces. B is wrong because fog is a visible collection of tiny liquid droplets suspended near the ground. D is wrong because snow is frozen, solid water. The key distinction is between invisible gas and visible condensed or frozen water. Memory cue: invisible moisture is vapour; visible droplets are produced after condensation.

Related tags

Water VapourHumidityAtmospheric MoistureCondensationDewFogEvaporationAnd CondensationHumidity Evaporation And Condensation

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