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23 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Stress |
A force that acts on an area of rock to change its shape or volume |
It starts with an s |
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Tension |
Stress that tretches rock so that it becomes thinner in the middle |
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Compression |
Stress that squeezes rock, causing folding |
To squeeze is to |
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Shearing |
Stress that pushes rock, causing folding |
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Normal Fault |
A type of fault where the hanging wall slides downwards; caused by tension in the crust |
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Mercalli scale |
A scale that rates earthquakes according to their density and hiw much damage they cause at a particular place. |
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Seismograph |
A device that records ground movements caused by seismic waves. |
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Reverse fault |
A type of fault where the hanging wall slides upwards; caused by tension in the crust. |
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Strike-Slip Fault |
A type of fault where rocks on either side move past each other with little up or down motion. |
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Plateau |
A landform that had high elevation and a more or less level surface |
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Earthquake |
The shaking that results from the movement of rock beneath Earths surface |
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Focus |
The point beneath Earths surface where rock breaks under stress and causes and earthquake. |
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Epicenter |
The point on Earth's surface directly above an Earthquake's focus |
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Richter Scale |
A scale that rates an earthquake's magnitude based on the size of its seismic waves. |
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What are the larget waves on a seismogram? |
Surface waves. (S waves) |
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What is the rating of he earthquake damage at a particular location? |
Mercalli Scale |
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What is a tsunami? |
A giant wave usually caused by an earthquake beneath the ocean floor. |
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What process causes stress on Earth's crust? |
The movement of Earth's plates. |
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How is the amount of energy released by an earthquake related to it's magnitude? |
The more energy released, the larger the magnitude |
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How can homes and other structures be protected from liquefaction? |
Homes built on soft ground should be anchored to solid rock below the soil. Other structures can be built on supports that go through soft soil to firmer ground. |
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How is a plateau formed? |
By the stretching and pulling of Earth's crust |
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What do the jagged lines on a seismogram indicate? |
How powerful they are. |
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What type of stress in the Earth's crust results in the formation of folded mountains? |
Compression |
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