| A | B |
|---|
| Transform Boundary | plates sliding past each other |
| Convergent Boundary | plates moving towards each other |
| Divergent Boundary | plates moving away from each other |
| Continental Crust | less dense than oceanic crust |
| Pacific Plate | an oceanic plate |
| Fault | fracture in the Earth's crust |
| Plate Tectonics Theory | crustal plates are always moving |
| Composite Volcano | Mt. Fuji, Mt. St. Helens |
| Cinder Cone | a very steep volcano |
| Lava | magma that has erupted onto the Earth's surface |
| Asthenosphere | layer that enables plates to move |
| Plume | hot spot in the Earth's Lithosphere |
| Seismology | study of the earthquakes & seismic waves |
| Pacific Rim of Fire | volcanoes that surround the Pacific Ocean |
| Focus | source of an earthquake |
| Epicenter | point on surface of Earth directly above the focus |
| P wave | compressional wave |
| S wave | transverse wave, side-side |
| Surface wave | most destructive wave, combo of P& S waves |
| Magnitude | intensity of an earthquake |
| Seismogram | a reading from a seismograph |
| Seismograph | measures the strength of an earthquake |
| Hot Spot | hot magma forces a hole through the surface of the Earth |
| Subduction | crustal plate is forced beneath another crustal plate |
| Rift | caused by divergent boundaries |
| Earthquakes | a result of transform boundaries |
| Mountains | a result of convergent boundaries |
