1.
The rigid outer part of the Earth consists of the crust and upper mantle.
2.
The soft, plastic layer of the mantle beneath the lithosphere.
3.
Massive, moving pieces of Earth's lithosphere.
4.
A plate boundary where plates collide
5.
A plate boundary where plates pull apart
6.
A plate boundary where plates slide past each other horizontally.
7.
A process where one plate sinks beneath another.
8.
A supercontinent that existed 200 million years ago.
9.
Heat transfer in the mantle that moves plates.
10.
Underwater mountain range formed by divergent plates.
11.
A fracture in the crust where movement occurs.
12.
The point on Earth's surface directly above an earthquake's focus.
13.
The point inside the crust where an earthquake begins.
14.
Energy waves released during an earthquake.
15.
Instrument used to record earthquake waves.
16.
Scale used to measure the magnitude of an earthquake.
17.
Large ocean wave caused by an underwater earthquake.
18.
Molten rock beneath Earth's surface.
19.
A plume of magma creating volcanic features in the middle of a plate.
20.
The opening through which volcanic material escapes
