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Why did Earth not become completely calm even after crust formation?

Answer and explanation

Correct answer: Because internal heat and volcanic activity continued

The direct answer is A. Formation of a crust cooled the outer surface, but it did not remove the heat inside Earth. The young Earth still contained intense internal heat, and molten material could rise through cracks or weak areas. This produced continuing volcanic activity and further changes in the surface. Option A is correct because internal heat and volcanism continued after crust formation. Option B is wrong because modern humans appeared much later and could not explain early Earth processes. Option C is wrong because solar wind is a stream of particles from the Sun, not a cause of molten activity inside the crust. Option D is wrong because ozone is an atmospheric gas and cannot shake Earth’s core. Keep surface cooling separate from interior cooling: a crust may form while the inside remains very hot.

Related tags

CrustInternal HeatVolcanism

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