The lithosphere is around 100 km deep. Answer 2: The correct answer is its crust. The Earth's crust refers to the outermost rocky shell of the Earth where organisms live (refer to second image). The crust is made of solid rocks, including igneous, sedimentary and metamorphic rocks. The Earth's crust is around 30 km deep. read more
Layers of The Earth Acting as the outer shell of the Earth, the lithosphere describes two distinct layers of rock. These layers are the least dense, most rigid, and coldest of all the Earth's layers. read more