Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Earthquakes
An interactive study of earthquakes
| Question | Answer |
|---|---|
| earthquake | shaking and rumbling of the earth |
| Richter Scale | used to assign quake magnitudes |
| faults | fractures in the earth's crust |
| hypocenter | 1st movement in fault |
| epicenter | directly above the hypocenter |
| seismographs | instrument measuring vibration waves |
| Primary Wave | Wave which causes rock particles to move back and forth in the same direction the wave is traveling, the first wave to pass through after an earthquake |
| Secondary WAve | Wave which causes rock particles to move at right angles to the direction of wave travel, the second wave to pass through the earth after an earthquake |
| Surface Wave | Wave which causes rock particles to move in a backward rolling and side to side swaying motion, this is the most destructive earthquake wave |
| Normal Fault | occurs when the two sides of a fault pull apart. The rocks on one side drop down lower than the other side. This is the result of two divergent boundaries undergoing tension. The hanging wall moves downward. |
| Reverse Fault | a geological fault in which the upper side appears to have been pushed upward by compression |
| Strike Slip Fault | Break in rock caused by shear forces where rocks slide past each other without much vertical movement |
| Tension Forces | make rocks move along faults by causing rocks to be pulled apart, causing a normal fault |
| Seismic Wave | A wave of energy that travels through the Earth and away from an Earthquake in all directons. |
| Seismologist | a scientist who studies earthquakes |
| Shadow Zone | area where no seismic waves are detected |
| Inner Core | a dense sphere of solid iron and nickel in the center of the Earth |
| Outer Core | a layer of molten iron and nickel that surrounds the inner core of the Earth |
| Mantle | the layer of the earth between the crust and the core |
| Magnitude | measurement of energy released by an earthquake; maximum motion shown on a seismograph. |
| Liquification | Shaking of the soil makes it at more like a liquid causing buildings to collapse |
| Mercalli Scale | a scale that rates earthquakes according to their intensity and how much damage. Uses Roman Numerals |
| tsunami | seismic sea wave, generated by a major earthquake in or near an ocean basin |
Created by:
akteacher
Popular Physical Science sets