Put these layers of the earth in order, starting at the outermost layer and going inward.

Crust, Mantle, Outer core, Innercore. The earth has four layers. the crust is the outermost layer which is composed of dense iron magnesium silicate igneous rocks which range from 0-70 kilometers. The mantleis the thickest layer. Outer core is fluid layer and inner core the hottest layer composed of solid.