| A | B |
|---|
| Fault | a break in the earth's crust |
| Earthquake | shaking/trembling of earth's crust |
| Shearing | pushes rock in 2 opposite directions |
| Tension | stretching rock so it becomes thinner in middle |
| Compression | stress on rock that squeezes until it folds/breaks |
| Normal Fault | caused by tension |
| Reverse Fault | caused by compression |
| Strike Slip Fault | caused by shearing |
| Anticline | forms the arch |
| Syncline | forms the bowl |
| focus | point beneath earth's surface |
| epicenter | point on surface directly above focus of earth quake |
| P waves | moves like an accordian |
| S wave | moves up and down and side to side |
| Surface wave | slowest wave with greatest damage |
| seismograph | measures the speed of seismic waves |
