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What is the most correct basis for linking water vapour in the secondary atmosphere with the beginning of the hydrosphere?

Answer and explanation

Correct answer: Water vapour condensed into rain and water accumulated

Water vapour in the secondary atmosphere became important for hydrosphere formation only when Earth’s surface cooled sufficiently. Cooling allowed the vapour to condense into liquid droplets, which gathered into clouds and produced prolonged rainfall. The rainwater then collected in depressions and lower parts of the surface, gradually forming rivers, lakes and early oceans. This sequence connects the atmosphere with the hydrosphere: atmospheric vapour changed into liquid water and accumulated on the surface. Water vapour did not form the metallic core, stop the solar wind or directly create the first complete ozone layer. Therefore, option A gives the correct scientific basis for the beginning of the hydrosphere.

Related tags

Water VapourHydrosphereCondensationEarly OceansEvolution Of The EarthThe Origin And Evolution Of The EarthGeographyClass 11 Mcq

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