Earth's Layers Vocabulary

shaped like a ball, with all points on the surface at a equal distance from the center

• sphere

• mantle

• plate tectonic

• divergent boundary

the force that every object exerts on all other objects because of their masses

• gravity

• crust

• core

• subduction

the amount of mass in a material per unit volume

• density

• mass

• volume

• weight

the brittle, rocky outer layer of Earth

• crust

• mantle

• asthenosphere

• core

the thick middle layer in the solid part of Earth

• mantle

• core

• crust

• lithosphere

the crust and the uppermost mantle are grouped together in a rigid layer called

• lithosphere

• asthenosphere

• mantle

• core

the plastic (flowing) layer within the mantle

• asthenosphere

• lithosphere

• mantle

• core

rocks that flow

• plastic

• rubber

• amorphous

• river

dense metallic center of Earth

• core

• plastic

• sphere

• density

Earth's surface is made of rigid slabs of rock, or plates, that move with respect to each other. This is called

• plate tectonics

• aesthosphere

• plate boundaries

• subduction