Question : The core of the Earth is made up of___________.
Option 1: cobalt and nickel
Option 2: iron and cobalt
Option 3: nickel and magnesium
Option 4: nickel and iron
Correct Answer: nickel and iron
Solution : The correct option is nickel and iron .
The two main elements that make up the Earth's core are nickel and iron. The Earth's inner and outer cores are names for this central region. Iron and nickel make up the majority of the solid inner core, whereas these two elements also make up the majority of the liquid outer core.
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