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15 Cards in this Set
- Front
- Back
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any vibration in the earth's surface
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earthquake
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the point in the lithosphere where the continental plates slip
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focus
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the point on the Earth's surface directly above the focus
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epicenter
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vibrations that travel upward and outward from the focus of an earthquake, causing the Earth's surface to move
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seismic waves
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The resettling of rocks along the fault line after the continental plates stop moving in an earthquake cause what?
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aftershocks
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Where are earthquakes most likely to occur?
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Continental plate boundaries and fault lines
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The scale to measure earthquakes that is based on the amount of energy produced at the focus of an earthquake
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Richter scale
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What is the Richter scale measured with?
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seismometer
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Scientists who study earthquakes
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Seismologists
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What numbers are on the Richter scale?
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1 to 10
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How much greater is each step on the Richter Scale?
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20 times greater than the previous number
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What earthquake scale is based on eyewitness accounts?
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Mercalli scale
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What is #1 on the Mercalli scale?
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not felt
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What is #12 on the Mercalli scale?
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nearly everything is damaged
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True or False: An earthquake usually lasts for less than a minute.
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True
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