Crust - The crust is the outermost layer of the earth it consists of mountains, trees, bodies of water e.t.c. The crust is between 10-90 km.
Mantle - By the time you reach the mantle, you will notice that it is much much lower and very thick (2500-2900 km). It is made out of melted rocks (iron).
Outer Core - This is also made out of melted rock and is very hot. It is 2200 km thick.
Inner core - The Inner core is 80% iron and is 1200 km.
Lithosphere - The Lithosphere is the upper, hard portion of the Mantle and the crust.
Asthenosphere - The asthenosphere is just below the lithosphere and is always moving. It warms up and rises then cools and falls

	Created by Oluwaseun Oyedele over 4 years ago

Grade 7 Science Slide Set on Section 2 (D), created by Oluwaseun Oyedele on 28/03/2020.