| A | B |
|---|
| seismic waves | a vibration that travels through Earth carrying energy from the quake |
| epicenter | the point on Earth's surface directly above the center or the quake |
| earthquake | movement of the ground caused by a sudden release of energy from a sudden shift of rocks in the crust |
| aftershock | a smaller earthquake that happens after a larger earthquake |
| fault | a break in Earth's crust where movement of rocks happens |
| Richter Scale | a measurement of the magnitude or how powerful an earthquake is |
| seismograph | a machine scientists use to measure the magnitude of an earthquake |
| magnitude | the measurement of the energy released by an earthquake |
| stress | a force that causes rock to change shape |
| tsunami | a giant, fast moving wave that is caused by an undersea earthquake |
