Earth's Layers Vocabulary

Front

Shaped like a ball, equal distance from center

Back

Sphere

Front

Force exerted by masses

Back

Gravity

Front

Amount of mass per unit volume

Back

Density

Front

Brittle, rocky outer layer of Earth

Back

Crust

Front

Thick middle layer of Earth

Back

Mantle

Front

Rigid layer of crust and uppermost mantle

Back

Lithosphere

Front

Plastic layer in the mantle

Back

Asthenosphere

Front

Rocks that flow

Back

Amorphous

Front

Dense metallic center of Earth

Back

Core

Front

Earth's surface movement

Back

plate tectonics