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What is the main natural source of atmospheric moisture?

Answer and explanation

Correct answer: Evaporation from oceans

Correct answer: B, evaporation from oceans. Atmospheric moisture means water vapour present in the air. Oceans cover a very large part of Earth and provide an enormous exposed water surface. Solar energy causes some ocean water to evaporate, adding water vapour to the atmosphere. This vapour is later transported, cooled, condensed and returned through precipitation. A is wrong because the Earth’s interior is not the main exposed source of atmospheric water vapour. C is wrong because mountain erosion produces sediment and does not supply the main moisture. D is wrong because volcanic ash is solid material, not the principal source of water vapour. Land, lakes, rivers, vegetation and ice can also contribute moisture, but oceans are the dominant natural source. Memory cue: in the water cycle, oceans are the great source and precipitation is the return.

Related tags

GeographyAtmospheric MoistureOcean EvaporationWater CycleHumidityEvaporationAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereClass 12 Mcq

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