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Ocean formation was not only a result of rainfall but also depended on which surface condition?

Answer and explanation

Correct answer: Sufficiently cool and stable surface

The direct answer is D, a sufficiently cool and stable surface. Rainfall alone cannot make lasting oceans if the surface is still extremely hot, molten or unstable, because water would evaporate or remain unable to collect. Earth had to cool enough for water to condense and remain in liquid form. A fully gaseous surface cannot hold liquid oceans. B, a highly burning surface, would also be too hot and would prevent stable accumulation of water. C, a fully living surface, is impossible at this early stage because life developed only after suitable conditions appeared; life is not the required surface condition. D is correct because cooling and solidification allowed rainfall to collect in depressions and form oceans. The complete chain is cooling, condensation, rainfall, collection and ocean formation. Exam cue: rainfall needs a cool, solid surface to stay as water.

Related tags

Ocean FormationCoolingSolid Surface

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