UPSC Prelims 2009·GS1·geography·general geography

In the structure of planet Earth, below the mantle, the core is mainly made up of which one of the following?

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Last updated 23 May 2026, 3:31 pm IST
  1. AAluminium
  2. BChromium
  3. CIronCorrect
  4. DSilicon

Explanation

The Earth is divided into three main layers: the crust, the mantle, and the core. The core is the innermost layer and is primarily composed of heavy metals. Specifically, it is made up of a combination of iron and nickel. This composition is often referred to by the acronym Nife, where Ni stands for nickel and Fe stands for Ferrum, which is the Latin word for iron. While nickel is present, iron is the most abundant element in the core, making it the correct choice. Elements like silicon and aluminium are major components of the Earth's crust, often referred to as Sial, but they are not the primary components of the core.
geography: In the structure of planet Earth, below the mantle, the core is mainly made up of which one of the following?
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