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Chapter 3
Terms for chapter 3
| Term | Definition |
|---|---|
| Earthquake | Shaking and trembling from movement of rock under the Earth's surface |
| Stress | A force that changes the shape or volume |
| Shearing | A type of stress where two plates slides past each other by a force of pushing |
| Tension | A type of stress where two plates pull apart |
| Compression | A type of stress where two plates collides or compresses together |
| Deformation | A change in volume or the shape of earth crust |
| Faults | Breaks in the Earth's crust |
| Strike-slip fault | A type of fault where rocks on either side move past each other |
| Normal fault | A type of fault where one block of rock lies above the fault and the other piece of rock lie below |
| Reverse fault | A type of fault that is like a normal fault but opposite stress |
| Folds | Bends in the Earth's crust formed from compression |
| Fault-block mountain | When two normal faults are parallel from each other |
| Anticline | An upward fold in the rocks crust formed by compression |
| Syncline | A downward fold in the rocks crust formed by compression |
| Focus | Lays beneath the earth's surface |
| Epicenter | Lays on the earth's surface directly above the focus point |
| Seismic Waves | Vibrations that travel through the Earth carrying energy |
| P Waves | First waves arrive and compress and expand |
| S Waves | Second waves that arrive after P and move side to side and a little up and down |
| Surface Waves | A wave moves slowly but causes most severe ground movements |
| Seismograph | A scale measures seismic waves |
| Mercalli scale | A scale that measures the intensity of a earthquake |
| Richter scale | A scale that measures the size of seismic waves |
| Moment magnitude | A scale that measures the total energy released in an earthquake |
| Liquefaction | When an earthquake's shaking turns soft soil into liquid mud |
| Aftershock | A earthquake that happens after a large earthquake which could be whiles after |
| Tsunami | If the earthquake is strong enough the water near an earthquake will form |
| Base-isolated building | A building design that reduces energy for during an earthquake |
| DROP-COVER-HOLD | An emergency plan people follow for earthquake's. |
| Plateau | A large area of flat land elevated above sea level |
Created by:
becerriljul
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