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Earthquakes Vocab
| Question | Answer |
|---|---|
| earthquake | the shaking that results from the movement of rock beneath Earth’s surface |
| epicenter | the point on Earth’s surface directly above an earthquake’s focus |
| fault | a break in Earth’s crust where masses of rock slip past each other |
| focus | the point beneath Earth’s surface where rock breaks under stress and causes an Earthquake |
| magnitude | a number geologists assign to an earthquake based on the earthquake’s size |
| normal fault | a type of fault where the hanging wall slides downward; caused by tension in the crust |
| P (primary) wave | a type of seismic wave that compresses and expands the ground |
| reverse fault | a type of fault where the hanging wall slides upward; caused by compression in the crust |
| Richter scale | a scale that rates seismic waves as measured by a particular type of mechanical seismograph |
| S (secondary) waves | seismic waves that vibrate from side to side as well as up and down |
| seismic waves | vibrations that travel through Earth carrying the energy released during an earthquake |
| seismograph | an instrument that records and measures seismic waves |
| shearing | stress that pushes a mass of rock in opposite directions |
| strike slip fault | a type of fault where rocks on either side move past each other sideways with little up-or-down motion |
| tension | stress that stretches rock so that it becomes thinner in the middle |
| transform boundary | a plate boundary where two plates move past each other in opposite directions |
Created by:
rllower1
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