A mantle is on its inner surface and the crust on its outer.
The outer core of the Earth is a liquid layer about 2,260 km thick composed of iron and nickel which lies above the Earth's solid inner core and below its mantle. Its outer boundary lies approximately 2,890 km 1,800 mi beneath the Earth's surface.
Innermost part of a core, specif. a solid sphere in the middle of the fluid core such as the iron-nickel core of the Earth.
The continental crust is the layer of granitic, sedimentary and metamorphic rocks which form the continents and the areas of shallow seabed close to their shores, known as continental shelves.
A thin layer of rock separates the Earth's oceans from the hot mantle beneath them.
The outer part of the Earth, consisting of the crust and upper mantle.
The asthenosphere lies beneath the lithosphere and consists of partially molten rock.
Convection Currents in the Mantle
Mantle convection is the slow creeping motion of Earth's solid silicate mantle caused by convection currents carrying heat from the interior of the Earth to the surface.
Ice Caps on the North and South Poles