| A | B |
|---|
| anticline | An upward fold in rock formed by compression of Earth's crust. |
| epicenter | The point on Earth's surface directly above an earthquake's focus. |
| fault-block mountain | A mountain that forms where a normal fault uplifts a block of rock. |
| focus | The point beneath Earth's surface where rock breaks under stress and causes an earthquake. |
| fold | A bend in rock that forms where part of Earth's crust is compressed. |
| magnitude | The measurement of an earthquake's strength based on seismic waves and movement along faults. |
| Mercalli scale | A scale that rates earthquakes accordking to their intensity and how much damage they cause. |
| P waves | A type of seismic wave that compresses and expands the ground. |
| plateau | A landform that has a more or less level surface and is elecated high aboce sea level. |
| Richter scale | A scale that rates seismic waves as measured by a mechanical seismograph. |
| S waves | A type of seismic wave that moves the ground up and down or side to side. |
| seismic waves | A vibration that travels through Earth carrying the energy released during an earthquake. |
| seismograph | A device that records ground movements caused by seismic waves as they move through Earth. |
| surface waves | A type of seismic wave that forms when P waves and S waves reach Earth's surface. |
| syncline | A downward fold in rock formed by compression in Earth's crust. |
