| Term | Definition |
| VOLCANO STUFF | VOLCANO STUFF |
| composite volcano | made of alternating layers of rock and lava |
| cinder cone volcano | small, steeply sloped volcano |
| active volcano | a volcano that can errupt at any time |
| dormant volcano | a volcano that is done errupting |
| sheild volcano | large, slightly sloped volcano |
| vent | where lava enters a volcano |
| crater | the pit at the center of a volcano |
| caldera | formed when a magma chamber empties |
| lava | what magma is called when it comes out of a volcano |
| magma | what lava is called inside a volcano |
| pyroclastic material | fragments of rock from an erruption |
| tephra | solid material ejected from a volcano's tephra chamber during an eruption |
| where do volcanoes form? | convergent boundaries |
| how are volanoes predicted? | when there are hot spots in a mountian |
| EARTHQUAKE STUFF | EARTHQUAKE STUFF |
| siesmograph | howe earthquakes are measured |
| P waves | fastest wave in the quake |
| S waves | 2nd fastest wave in the quake |
| strike slip fault | when the footwall and hanging wall move away from eachother <--- ---> |
| 3 types of boundaries | convergent, divergent, transform |
| what boundaries do earthquakes start at? | transform boundaries |
| elastic rebound | sudden return of a deformed rock to it's original shape |
| deformation | shape change in a rock due to stress |
| focus | point inside the earth where the quake begins |
| epicenter | point on the surface directly above where the quake started |
| richter scale | a logarithmic scale of 1 to 10 used to show the energy released by an earthquake |