Definitions for "Outer core"
Keywords:  mantle, nickel, core, iron, kilometers
The outermost part of Earth's core, believed to be liquid, and composed mainly of nickel and iron.
The outer portion of the core of the earth which is composed of liquid (molten) iron-nickel metal.
Outer region of the Earth's core. It is believed to be liquid nickel and iron and has a density of about 11 grams per cubic centimeter. It surrounds the inner core and has an average thickness of about 2,250 kilometers.