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14 Cards in this Set

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