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15 Cards in this Set
- Front
- Back
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what is used to measure earth quakes
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seismograph
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what is the crust made of and how thick is it
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70 kilometers thick, mostly rock and soil
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mantle, what is it made of and how thick is it
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the mantle is made of liquid and solid rock, it is 2,900 kilometers thick
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core, what is is made of and how thick is it
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it is made of solid nickle and iron, it is about 3,500 kilometers thick
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thought of continental drift
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the theory that the continents are slowly drifting apart
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volcanoes, how are they made
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when the magma from beneath the earths crust explodes out to form a volcanoes.
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cinder cone volcanoes
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small volcanoes with steep sides and explosive eruptions; made of ash and rock
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shield volcanoes
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low, broad volcano with a wide crater; formed from thin layers of lava
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composite volcano
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tall volcano; formed from quiet lava flows that alternate with eruptions of ash and rock
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vent
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round opening through which magma reaches the surface of the earth
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mountains are made.
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when layers of rock squeeze together
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fault
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break in the earth's crust along which movement occurs
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normal fault
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break in the crust in which the overhanging block of rock has slid down
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reverse fault
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break in the crust in which the overhanging block of rock has been raised
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strike-slip fault
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break in the crust in which the blocks of rock move horizontally past each other
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