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The earths core is made up of two parts-the inner and outer core. The inner core is made mostly of

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At the center of the Earth is the core, which has two parts. The solid, inner core of iron has a radius of about 760 miles (about 1,220 km). It is surrounded by a liquid, outer core composed of a nickel-iron alloy.

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The answer is (D) Solid Metal      

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