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14 Cards in this Set
- Front
- Back
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what is magma?
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the hot liquid that forms when rock partially or completely melts.
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what is a caldera?
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a caldera is what forms when a magma chamber that supplies material to a volcano, empties and the roof collapses.
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what is pyroclastic material?
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magma and fragments of rock that are ejected into the atmoshere during a violent volcanic eruption.
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what is a rift?
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a zone of thin , fractured, lithoshere that forms between tectonic plates as they separate.
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what is a crater?
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a funnel-shaped pit around the central vent of a volcano.
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what is a cinder-cone?
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a small steeply sloped volcano that forms from moderatly explosive eruptions of pyroclastic material.
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what is a hot spot?
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a place on the earths surface that sits driecty above a rising column of magma called a mantle plume.
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what is composite volcono?
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a volcono made of altering layers of lava and pyroclastic material also called stratovolcano
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what do scientest use to predict earthquakes?
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siesmograph
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why is there alot of volcano activity along the mid-atlantic range?
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because
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were all of the hawaiian islands formed at the same time, if not why?
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no, because the tectonic plates keep moving along in a row so they all form at different times.
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if not are the older islands farther east or west?
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west
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why is lava thick at times and runny at times?
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because depending on the amount of water and silica in a volcano, the lava can be thick or runny.
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were do volcanoes form?
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on tectonic plate boundries.
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