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What is the combined contribution of cooling and differentiation in Earth's layered structure?

Answer and explanation

Correct answer: Cooling solidified surface and differentiation arranged materials into layers

The governing concept is the combined development of Earth’s physical structure through cooling and differentiation. As the young Earth lost heat, its outer material cooled and solidified, helping establish a stable crust or surface. At the same time, when the interior was sufficiently hot and mobile, materials separated according to density: heavy metallic substances moved inward, while lighter silicate materials remained above them. These processes had different roles but worked together to create a layered planet with a core, mantle, and crust. Therefore option A is correct. Cooling did not form life or necessarily create ozone, and differentiation did not create life. Options C and D confuse internal geological processes with unrelated outcomes.

Related tags

CoolingDifferentiationLayered EarthEvolution Of The EarthThe Origin And Evolution Of The EarthGeographyClass 11 Mcq

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