Geography

• fraction: a numerical quantity that is not a whole number (e.g. 1/2, 0.5).
• layers of earth
• crust, mantle, core (inner & outer)
• What does the layer of earth do
• crust layer is made up of rocks and minerals and oxygen and silicon that make up 74.6% of it
• Crust layer is the thinnest layer ranging between 8-60km thick
• Crust layer is the outer most layer of the Earths structure
• Inner core is made up of solid iron and nickel.