The Earth's Inner Layers
By Gabe Smith
The crust is on the top of the earth.
The thickness is 5-30 km.
The Sub-layers are the Oceanic crust and Continental crust.
Three Facts about the crust is that people have only dug two miles into the crust, but the biggest cave is 5 miles into the crust. It is the first layer of the earth. It is a solid shell around the earth.
The depth is 30 km.
The thickness is 3,500 km.
The two Sub-layers are the Asthenosphere and Lithosphere.
Three Facts are that the mantle is the Second layer of the earth. It takes up 84% of the earth. Made from iron and magnesium.
The core is about 3,530 km deep.
The thickness of the core is 2,900 km.
The Sub-layers are the Outer core and Inner core.
Three Facts About the Earth's core: The core is the deepest layer of the earth. Inner core is solid. Outer core is solid but flows.
Convection in the Mantle
Follow up Questions
layers of the earth. (2014). Retrieved November 3, 2014, from coolmath.com website: http://www.sciencemonster.com/earth-science/layers-of-the-earth.htm