The outermost solid layer of a rocky planet or natural satellite. … A layer of the Earth (or any planet large enough to support internal stratification) between the crust and the outer core. It is chemically distinct from the crust and the outer core. The mantle is not liquid.

What are the compositional layers of the Earth *?

Starting at the center, Earth is composed of four distinct layers. They are, from deepest to shallowest, the inner core, the outer core, the mantle and the crust.

What does compositional layers mean in science?

Earth’s layers based on chemical composition are the crust, mantle, and core. The crust is the outermost layer and the thinnest layer. It is composed of either continental or oceanic material. Continental crust has the average composition similar to a granite and averages a thickness of 20 to 25 miles.