Overview of Chapters 7&8 of Glencoe Level Blue
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| Large vibrations that move through rock or other Earth materials | Earthquakes
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| when rocks strain and then break, the broken pieces snap back | elastic rebound
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| the surface of a break in a rock | fault
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| when strained rock's potential energy is released, it moves outward from the fault in waves | seismic waves
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| the point inside Earth where movement along a fault first occurs and energy is released | focus
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| the point on Earth's surface located directly above the focus | Epicenter
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| instrument that records an earthquakes seismic waves. | seismograph
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| when an earthquake occurs on the ocean floor, the sudden movement pushes against the wader and creates powerful waves that can travel thousands of kilometers | tsunamis
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| cone-shaped hills or mountains formed by denser surrounding rock | volcanoes
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| bits of rock or solidified lava dropped from the air after an explosive eruption | tephra
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| basaltic lava which flows easily | shield volcanoes
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| high gas content in the magma | cinder cone volcanoes
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| volcanoes made of alternating layers of lava and tephra | composite volcanoes
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| large rising bodies of magma force their way through earth's crust, not at plate boundaries | hot spots
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| where plates converge and denser plates subduct, or are forced underneath less dense plates | convergent plate boundaries
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
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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