Question

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Answer 1

Answer:

The earth's inner core is a solid ball of iron, nickel and other metals, while the outer core is liquid metal composed of iron and nickel as well. ... The outer core is believed to be about 2,300 kilometers (1,400 miles) thick, and is located 2,890 kilometers (1,400 miles) beneath the surface of the Earth.

Answer 2

Answer:

The core is made of two layers: the outer core, which borders the mantle, and the inner core. The boundary separating these regions is called the Bullen discontinuity. The outer core, about 2,200 kilometers (1,367 miles) thick, is mostly composed of liquid iron and nickel.

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