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17 Cards in this Set
- Front
- Back
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shaking of the earth's crust
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earthquake
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deepest layer of earth
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core
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thickest layer, made of solid and melted rock
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mantle
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point on earth's surface right above the focus of an earthquake
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epicenter
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layer of earth that includes land and the ocean floor
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crust
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continent-sized slabs that make up the crust and upper mantle
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plates
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break in earth's crust along which rocks move
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fault
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instrument that records earthquake waves
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seismograph
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underground point where an earthquake first starts
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focus
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What is earth's hottest layer?
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core
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Earth's plates move slowly on a thin layer of partly melted what?
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mantle
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What can scientists do with seismographs?
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measure earthquakes
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Why does California have more than 20,000 earthquakes each year?
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There is a large fault running through the state.
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What do some volcanoes form new as plates move apart and magma rises to the surface of the crust?
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new ocean floor
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What forms different kinds of volcanic mountains?
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different kinds of eruptions
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What might happen if Earth's plates stopped moving?
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no more earthquakes, new volcanoes, and mountains
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Which is a better model for a volcano erupting - a lit firecracker or a shaken can of soda? Why?
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can of soda - volcanoes erupt when pressure builds up and then is released
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