| A | B |
|---|
| Stress | A force that acts on a rock to change its shape or volume |
| tension | Stress force that pulls on the crust |
Normal fault,  | Fault caused by tension forces |
Reverse fault,  | Fault in rock caused by compression forces |
Strike-slip fault,  | Rocks on either side of fault slip past each other |
S-Waves (secondary waves),  | motion is perpendicular to the direction of wave propagation |
| Seismograph | An instrument that detects and measures seismic waves |
| focus | The area beneath Earth's surface where rock that is under stress breaks, triggering an earthquake. |
| epicenter | The point on the surface above the focus. |
earthquake,  , 
| Shaking of earth that results from the movement of rock beneath Earth's surface. |
| Richter scale | Rating of earthquake magnitude based on size of seismic waves. |
| P-Waves (Primary waves) | Seismic waves that compress and expandthe ground. |
| A Strike-Slip Fault or earthquake is likely to occur on a | transform boundary |
| A Normal Fault is likely to occur on a | divergent boundary |
| A Reverse Fault is likely to occur on a | convergent boundary |
| The focus of an earthquake is where | the movement occurred below the surface, possible even as deep down as the mantle |
| The epicenter of an earthquake is | on the surface directly above where the earthquake occurred |
| tension stress is | pulling apart |
| shearing stress is | two parts being torn in opposite directions |
