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Why are seas and oceans major sources of atmospheric water vapour?

Answer and explanation

Correct answer: Their water surface is very large

Correct answer: D, their water surface is very large. Solar energy heats the surfaces of seas and oceans, and water molecules escape from the liquid surface through evaporation. Seas and oceans cover extensive areas, so the total area available for evaporation is enormous. Winds then help transport some of this moisture into the atmosphere and over land. D is correct because the vast water surface allows evaporation to occur on a very large scale. A is wrong because seas and oceans contain liquid water, not solid water under ordinary conditions. B is wrong because the statement is unrelated and is also false in the intended sense. C is wrong because oceans contain dissolved salts but do not only produce salt; they also supply water vapour through evaporation. Memory cue: large liquid surface plus heat means large-scale evaporation.

Related tags

OceansEvaporationWater VapourWater CycleAtmosphereHumidityAnd CondensationHumidity Evaporation And CondensationWater In The Atmosphere

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