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16 Cards in this Set
- Front
- Back
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what is the difference between lava and magma? |
magma is beneath the surface lava is erupted magma |
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what are 3 things that trigger tsnamis? |
landslides,earthquakes,and volcanoes |
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what is a mountain that forms when molten rock is forced to the earths surface? |
volcano |
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how did the ring of fire get its name |
volcanoes surrounded the pacific ocean |
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what is a outpouring of lava without a significant explosive eruption? |
effusive eruptions |
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what is a gas driven explosion that propels magma and small fragments of material? |
high silica content |
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what causes a volcano to have an explosive eruption? |
high water content |
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what is the most dangerous type of eruption because they are very hot and travel very fast |
pyroclastic flow |
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how does a shield volcano erupt? |
effusive eruptions of fluid lava |
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how does a shield volcano form? |
layer by layer of solidified lava |
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how does the cinder cone volcano erupt? |
explosive eruptions of lava |
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how does the cinder cone form? |
erupting lava brakes apart into fragments called cinders that fall and accumulate around a vent |
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how does composite volcanoes erupt? |
effusive and explosive eruptions |
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how do composite volcanoes form? |
layers tephra create steep-sided,often symmetrical cones that can be very large |
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what is a shaking of the ground by sudden movement of large blocks of rock along the fault? |
earthquake |
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what is a fault well-known and active fault in the U.S.? |
san andreas |
