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Why were both cool crust and atmosphere necessary for ocean formation on early Earth?

Answer and explanation

Correct answer: Crust gave a base for water storage and atmosphere supplied water vapour

The correct answer is B. Early Earth was extremely hot, so liquid water could not remain on its surface at first. As the crust cooled, it became a stable solid surface containing depressions and basins where water could accumulate. At the same time, volcanic outgassing and cooling released water vapour into the atmosphere. When the planet’s surface temperature fell sufficiently, this vapour condensed, and rainfall gradually collected in low-lying areas to form oceans. The crust alone could not supply the water, and the atmosphere alone could not provide a stable basin for long-term storage. The other options confuse unrelated processes such as core formation, solar wind, and oxygen loss.

Related tags

Early-EarthCrustAtmosphereOcean-FormationEvolution Of The EarthThe Origin And Evolution Of The EarthGeographyClass 11 Mcq

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