| A | B |
|---|
| tetonic plates | enormous moving pieces of the earth's lithosphere |
| fault | a fracture in the earth's crust |
| earthquake | shaking and trembling of the earth at faults |
| seismograph | device that measures the size of waves created by an earthquake |
| epicenter | the point directly above where an earthquake begins |
| Richter Scale | a scale used to measure the strength of an earthquake |
| tsunami | a giant wave in the ocean caused by an earthquake |
| volcano | crack in the earth's surface where magma, gases, and water pour out |
| lava | magma that reaches the earth's surface |
| Ring of Fire | zone around the rim of the Pacific Ocean where majority of active volcanoes are found |
