| A | B |
|---|
| Pangaea | Large land mass before continents broke up |
| North American | Plate we live on |
| Pacific | Largest plate |
| 4 | # of layers on Earth |
| Crust | Layer we live on |
| Convection cycles in mantle | Causes plates to move |
| Convergent plate boundary | Two plates come together |
| Divergent plate boundary | Two plate move away from each other |
| Strike-slip (transform) boundary | Two plates slide against each other |
| P waves | First waves to come from earthquakes |
| S waves | Do the most damage during earthquakes |
| L waves | Combo of P and S waves |
| Focus | Where an earthquake begins |
| Epicenter | Point on the surface above where the earthquake begins |
| Richter scale | Scale measuring magnitude of earthquakes |
| Seismometer | Device that measures seismic waves |
| 3 | # of types of volcanoes |
| Igneous | Type of rock created by cooled magma or lava |
| Sedimentary | Rocks created by sediment being pressed together |
| Metamorphic | Rocks created from other rocks under heat/pressure |
| Yellowstone | Largest supervolcano in US |
| Tsunami | Series of large waves created by earthquakes |
| Magma | Liquid rock beneath the surface |
| Lava | Liquid rock above ground |
| Intrusive igneous | Igneous rock that cools slowly |
| Extrusive igneous | Igneous rock that cools quickly |
