Question

Why is the core of the earth also referred to as the metallic core?
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Answer 1

The outer core of the Earth is a fluid layer about 2,400 km (1,500 mi) thick and composed of mostly iron and nickel that lies above Earth's solid inner core and below its mantle. ... The inner core is also referred to as the solid core

Answer 2

The outer core of the Earth is a fluid layer about 2,400 km (1,500 mi) thick and composed of mostly iron and nickel that lies above Earth's solid inner core and below its mantle. The inner core is also referred to as the solid core.

Hope this helps.