| A | B |
|---|
| stress | forces that push and pull the crust |
| anticline | upward fold in a rock |
| compression | stress that squeezes rocks together |
| crust | surface layer of the earth |
| deformation | change in shape or volume of rocks |
| dome | raised area formed by magma pushing upward |
| fault-block mountain | formed by uplifted rocks |
| fault | break or crack in rock |
| fold | bend in rock |
| foot wall | block of rock below a fault |
| hanging wall | block of rock above a fault |
| lateral fault | blocks move horizontally past each other |
| normal fault | hanging wall moves down |
| reverse fault | hanging wall moves up |
| Richter scale | measures strength of earthquakes |
| S wave | side to side earthquake wave |
| P wave | push-pull earthquake wave |
| epicenter | point on earth's surface above the focus |
| focus | underground point of origin of earthquake |
| seismic wave | earthquake wave |
| seismograph | machine that records earthquake waves |
| shearing | pushes rocks in opposite, horizontal directions |
| surface wave | up and down earthquake wave |
| tension | stress that pulls rocks apart |
| syncline | downward fold in a rock |
| thrust fault | hanging wall slides over foot wall |
| tsunami | giant sea wave caused by an earthquake |
| volcanic dust | small rock particles blown into air |
| volcano | molton rock breaks through earth's crust |
