The Earth’s

CrustThe crust of

the Earth is

composed of a

great variety

of igneous, meta

morphic, and sedi

mentary

rocks. The crust is

underlain by the

mantle.

The Earth’s Mantle

is a part of

a terrestrial planet or

other rocky body large

enough to

have differentiation by

density. The interior

of the Earth, similar to

the other terrestrial

planets, is chemically

divided into layers.

The mantle is a highly

viscous layer between

the crust and the

outer core.

The Earth’s outer core

we next would

encounter the Earth’s

outer core, which

extends to a depth of

around 3000 miles

beneath the surface.

It is believed that this

outer core is made up

of super-heated

liquid molten lava.

This lava is believed

to be mostly

iron, and nickel.

The Earth’s

inner core

we would reach

the Earth’s inner

core. The inner

core extends

another 900 miles

inward towards

the center of the

Earth. It is

believed that this

inner core is a

solid ball of mostly

iron, and nickel.