Earth's solid, rocky surface containing the continents and ocean floor

The idea that many kinds of rocks from flat, horizontal layers

The idea that a supercontinent split apart into pieces

The idea that new crust is forming at the ridges in the sea floor

Hot molten rock below earth's surface

The idea the Earth's surface has broken into plates

The layer beneath the Earth's crust

The sliding of a denser ocean plate under another plate when they collide

A huge crack at or below the surface

The point where an earthquake starts as rocks begin to slide past each other

A vibration that spreads out away from a focus when an earthquake happens

The point on earth's surface directly above the focus of an earthquake

Shacking of earth's crust after the initial shaking of an earthquake

A sensitive device that detects the shaking of earth's crust during an earthquake

The amount of energy released by an earthquake

The central opening in a volcanic area though which magma may escape

Magma that reaches Earth's surface and flows out of a vent

A cuplike hollow that forms at the top of a volcano around the vent

Where magma can melt thought a plate moving above it

A steep-sided cone that forms from explosive eruption of hot rocks

A wide, gently sloped cone that forms from flows of lava

A cone formed from explosive eruptions of hot rocks followed by flow of lava

Heat from below earths surface