The Earth's core is made up of very heavy material mostly constituted by:

A. Iron and Aluminum

B. Aluminum and Nickel

C. Nickel and Iron

D. Nickel and Lead

Answer: Option C

Solution(By Examveda Team)

The solid, inner core of iron has a radius of about 760 miles (about 1,220 km), according to NASA. It is surrounded by a liquid, outer core composed of a nickel-iron alloy.