Crust: relatively thin outer layer4-70 km thick, low density, 2.7-.0 g/cm3, active earthquakes, volcanoes, moving plates etc.) chemically different from layer below it. Divided into: ocean crust 4-10 km thick composed of black volcanic rock *basalt* and continental crust which is older, thicker, and less dense.
Mantle: thick layer below the crust which is 2970 km thick and 84% of earth's volume. Moho is area between crust and mantle
Core: central layer of earth 3,500 km thick. Liquid outer core and solid inner composed mainly of nickle and iron. The magnetic field is generated by spinning outer core. Oxygen and sulfur also found in core.
Lithosphere: the crust and upper right mantle 100 km thick broken into a series of plates