Earth's crust is the surface of Earth. It's technically under the 5 layers of the atmosphere and the rest of the universe.
Earth's crust is far thicker under the continents.
Earth's crust is far thicker under the continents.
'Magma' is melted rock occurring under the Earth's surface. When it comes up and flows out on the Earth's surface it is called 'lava'.
It is the surface of the earth, except it is under water instead of under air.
Focus
the plates under earth's surface
it comes from under the earth's crust
mountains
Subterranean is defined as meaning lying under the surface of the earth. An example of this term would a subterranean river that is known to lie completely or almost completely under the surface of the earth.
It is under the earth
the surface of the earth