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Why does water vapour strongly affect weather even though its atmospheric amount is small?

Answer and explanation

Correct answer: Because it is linked with clouds, rain, and latent heat exchange

Answer: A. Water vapour is a variable but highly active part of the atmosphere. It supplies the moisture from which clouds and precipitation develop. When vapour condenses into droplets or freezes into ice, latent heat is released; when liquid water evaporates, energy is absorbed. These transfers of energy help influence air temperature, convection, cloud growth, and weather systems. Thus its importance depends on its physical and energetic role, not simply on its percentage of atmospheric gases. A is correct because it names clouds, rain, and latent heat exchange. B is wrong because nitrogen is much more abundant than water vapour in the atmosphere. C is wrong because water vapour does not remove gravity. D is wrong because it does not dry oceans completely. Memory cue: small quantity, large moisture-and-energy effect.

Related tags

Water VapourWeatherLatent HeatHumidityEvaporationAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereGeographyClass 12 Mcq

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