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10 Cards in this Set
- Front
- Back
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How many active volcanoes are on the Earth?
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Where are the majority of the volcanos located?
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What volcano is most active?
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magma is forced upward, less dense, pressure, vent
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rifts, Iceland mid atlantic ridge,
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subduction, hot spots not at boundaries, the Hawaiian islands
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erupts on a regular basis. (mauna Loa, Mt. Vesuvius)
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hasn't erupted in a while, but could erupt in the near future. (mt. lassen, Mt. rainer)
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volcanoes that have not erupted in recorded in history, (mt. Kenya)
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Quiet eruptions, basaltic lava, broad with gently sloping sides mauna loa
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explosive eruption, throws rocks and lava high into the air, tephra varies in size- ash, cinders, bombs, and blocks, Steep sided loosely packed... Paricutin
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Cycle of lava and tephra repeated in alternated layers. Eruptions vary. less steep sides. Mt. Etna
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Where do volcanos form and why?
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low water vapor and silica
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medium water vapor and silica
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high water vapor and silica
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smallest size of tephra
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2nd smallest size of tephra
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3rd biggest size of tephra
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largest size of tephra
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