earthquake and volcano vocabulary
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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Earthquake | vibrations produced when rocks break along a fault
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Fault | surface along which rocks move when they pass their elastic limit and break
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Focus | in an earthquake, the point below Earth's surface where energy is released in the form of seismic waves
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Primary waves | seismic wave that moves rock particles back-and-forth in the same direction that the wave travels
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Secondary waves | seismic wave that moves rock particles at right angles to the direction of the wave
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Surface waves | seismic wave that moves rock particles up-and-down in the backward rolling motion and side-to-side in a swaying motion
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Epicenter | point on Earth's surface directly above and earthquake's focus
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Seismograph | instrument used to register earthquake waves and record the time that each arrived
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Richter scale | a scale used to measure the magnitude of an earthquake
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modified Mercalli scale | a scale used to measure the amount of damage that occurred during an earthquake
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volcano | opening in Earth's surface that erupts sulfurouse gases, ash, and lava; can form at Earth's plate boundaries, where plates move apart or together, and at hot spots
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vent | opening where magma is forced up and flows out onto Earth's surface as lava, forming a volcano
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crater | steep-walled depression around a volcano's vent
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Hot spot | the result of an unusually hot area at the boundary between Earth's mantle and core that forms volacoes when melted rock is forced upward and breaks through the crust
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Shield volcano | broad, gently sloping volcano formed by quiet eruptions of basaltic lava
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cinder cone volcano | steep-sided, loosely packed volcano formed when tephra falls to the ground
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composite volcano | volcano built by alternating explosive and quiet eruptions that produce layers of tephra and lava; found mostly where Earth's plates come together and one plate sinks below the other
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tephra | bits of rock or soldified lava dropped from the air during an explosive volcanic eruption; ranges in size from volcanic ash to volcanic bombs and blocks
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
pistons22
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