Facts about the outer core

The core of the Earth is the center. The inner core is solid, and is 90% iron. But the outer core is a liquid ...

The outer core is made of a mixture of iron and nickel, with smaller amounts of silicon and oxygen.

The outer core officially begins at a depth of 2550 km below the surface of the Earth, down to a final depth of 4750 km at the boundary between the inner and outer core.