| A | B |
|---|
| a fault formed due to tension on rocks | normal fault |
| fault due to shearing forces | strike-slip fault |
| point where earthquake energy is released | focus |
| point on Earth's surface directly above the origin of the earthquake | epicenter |
| boundary between the crust and the mantle | Moho discontinuity |
| instrument that records seismic waves | seismograph |
| measure of energy released by an earthquake | magnitude |
| seismic sea wave | tsunami |
| refers to structrues that are resistant to seismic vibrations | seismic-safe |
| A bending and stretching rock will break when it reaches this point. | elastic limit |
| The breaking of rocks that causes vibrations in the earth. | earthquakes |
| These are massive sections of the Earth's crust where earthquakes occur along their boundaries | tectonic plates |
| A pulling force | tension |
| A force which pushes together | compression |
| The difference between arrival times of P- and S-waves is an indication of ... | how far these seismic waves traveled |
| An scale where the earthquake magnitudes are expressed as numbers | Richter Scale |
| A region of the Earth where seimic waves are not received | shadow zone |
| These seismic waves travel fastest. | P-waves |
| These seismic waves travel through both solids and liquids. | P-waves |
| These seismic waves are compressional waves. | P-waves |
| These seismic waves are transverse waves. | S-waves |
| These seismic waves travel only through solids. | S-waves |
| P-wave means: | primary wave |
| S-wave means: | secondary wave |
| If the arrival time difference is greater, then the distance the seismic waves traveled is: | greater |
| A scientist who studies earthquakes | seismologist |
| What is the minimum number of seismic stations needed to locate an earthquake epicenter? | three |
| This scale uses Roman numerals to designate the amount of damage caused by a earthquake. | Mercalli |
| The point at the Earth's surface that receives the greatest amount of energy is the | epicenter |
| Most lost lives during an earthquake are due to: | fallimg buildings |
| A fault produced by tension is a ___ fault. | normal |
| Compressional forces will causes a ___ fault. | reverse |
| Tectonic plates that move apart are said to be: | divergent |
| Tectonic plates that move toward each other are said to be: | convergent |
| A famous fault in California is the ___ Fault. | San Andreas |
| Much of what we know about the Earth's interior is from the study of ___. | earthquakes |
