Earth’s core is mainly made up of ______.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. nickel and iron.
- Unlike the mineral-rich crust and mantle, the core is made almost entirely of metal—specifically, iron and nickel.
- Earth’s core is the furnace of the geothermal gradient.
- The shorthand used for the core’s iron-nickel alloys is simply the elements’ chemical symbols—NiFe.