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Before hydrosphere formed what cooperation between atmosphere and surface was necessary?

Answer and explanation

Correct answer: Atmosphere supplied vapour and surface allowed water to remain

The correct answer is option A. Formation of the hydrosphere required both a source of water and a surface cool and stable enough to retain liquid water. Volcanic outgassing and the developing atmosphere supplied water vapour. As Earth cooled and a solid crust formed, the vapour could condense into liquid water. Surface depressions and basins then allowed that water to collect and remain, producing the early hydrosphere. Option B assigns impossible roles: the atmosphere does not form Earth’s core and the surface does not create the solar wind. Option C incorrectly treats ozone and gravity as removable in this way. Option D gives no valid geological process. The key idea is “vapour from above, retention below.”

Related tags

HydrosphereAtmosphereEarth CoolingEarth EvolutionEvolution Of The EarthThe Origin And Evolution Of The EarthGeographyClass 11 Mcq

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