by: Libby Schaaf

- Earth's solid, rocky surface

-the idea that many kinds of rocks form flat, horizontal layers.

- the idea that a supercontinent split into our continents

- the idea that new crust is forming at the ridges, making new crust

-hot, molten rock

-the idea that Earth's surface is broken into plates

-the layer beneath Earth's crust

- the sliding of a denser ocean plate under another plate

- a huge crack in the Earth's crust

- the point where an earthquake as rocks begin to slide past eachother

- a vibration that spreads from the focus when an earthquake happens

-the point on Earth's surface directly above the focus

- shaking of Earth's crust after the initial earthquake

- a sensitive device that detects the shaking of Earth's crust

-the amount of energy released by an earthquake

- the central opening in a volcanic area where magma can escape

- magma that reaches Earth's surface and flows from a vent

- a cup-like hollow that forms around the vent of a volcano

- a very hot part of the Earth's mantle

- a steep-sided cone that forms from eruptions of hot rocks

- a wide, gentle-sloped cone that forms from flows of lava

-a cone formed by eruptions of hot rocks and lava over and over again

-heat from below Earth's surface