Science Project by Aiyanna L. 2nd period
The crust is the top layer, then mantle, then outer and inner core. A part of the mantle are the Asthenosphere and Lithosphere. The lithosphere are the plates of Earth and they rest upon the Asthenosphere.
Composition and Thickness
The mantle is made of asphalt and is 1800 miles thick.
The outer core is made of liquid iron and nickel and is 1400 miles thick.
The inner core is made of solid iron and nickel and is 800 miles thick.