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Which layer of the Earth's interior is considered to be composed mainly of nickel and iron?

Answer and explanation

Correct answer: Core

The governing concept is the compositional structure of Earth’s interior. The core is traditionally described as being rich mainly in nickel and iron, represented by the term ‘nife’ from nickel and ferrum, the Latin word for iron. Therefore, option C is correct. The mantle is dominated by silicate minerals, the crust is the thin outer rocky layer, and the lithosphere includes the crust plus the rigid uppermost mantle; none of these is the mainly nickel–iron layer.

Related tags

Earth InteriorCoreNickel IronNife

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