______ is also called the lithosphere.

The correct answer is: Geosphere

• The Earth is made up of four layers: crust, mantle, outer core, and inner core.
• The lithosphere is the rigid outer layer of the earth which includes the crust and the uppermost mantle.
• The crust is around 8 km thick on the inside and has been extensively studied. The continental crust is formed largely of granite. Basalt is a volcanic lava rock that makes up the marine crust.
• The uppermost mantle is mostly made up of silicate rocks that are high in magnesium and iron.