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What became possible when the surface of early Earth cooled?

Answer and explanation

Correct answer: Rainwater remaining on the surface

Cooling changed the early Earth from an extremely hot body into a surface on which water could collect. As the surface temperature fell, water vapour condensed into rain. Once the crust became sufficiently cool and stable, rainwater could remain in depressions instead of immediately turning back into vapour. This made the formation of oceans and other water bodies possible, so option C is correct.

The gases did not become the Sun, because the Sun already existed before the Earth formed. Human cities appeared far later, after life and human societies developed. The Moon did not disappear as a result of surface cooling. The important sequence is cooling, condensation of water vapour, rainfall, and accumulation of water on the surface.

Related tags

Surface CoolingRainwaterWater Storage

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