Question : Earth's core is mainly made up of _____________.
Option 1: nickel and copper
Option 2: nickel and alumina
Option 3: nickel and iron
Option 4: nickel and magnesium
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Correct Answer: nickel and iron
Solution : The correct answer is nickel and iron.
The earth's core is mainly made up of nickel and iron. It is composed of two layers: the outer core and the inner core. The outer core is in a liquid state, while the inner core is solid due to higher pressure.
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