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A high amount of iron and nickel in Earth's core most strongly supports which conclusion?

Answer and explanation

Correct answer: Heavy metallic materials moved toward the centre because of density

The governing concept is planetary differentiation during the early evolution of Earth. When the young Earth was sufficiently hot or partly molten, substances separated according to density under gravity. Dense metallic elements such as iron and nickel sank toward the centre, while lighter silicate materials moved upward to form much of the mantle and crust. Therefore, option B is correct and explains why the core is predominantly metallic. The order in which oceans formed does not explain the core’s composition. The ozone layer has no mechanism for transporting metals into Earth’s interior, and photosynthesis developed much later as a biological process. The evidence directly supports density-based separation.

Related tags

Earth-EvolutionCoreDifferentiationEvolution Of The EarthThe Origin And Evolution Of The EarthGeographyClass 11 Mcq

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