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36 Cards in this Set
- Front
- Back
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geology
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the study of the earth
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crust
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the outermost layer of the earth
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mantle
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middle layer of the earth
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moho
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mohorovicic discontinuity- boundry between crust and mantle
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core
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innermost reigon
outer core-liquid inner core-solid |
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weathering
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process where rocks gradulally break into smaller peices
1. chemical weathering-natural acid 2. physical weathering-running water, ice, windblown sand,trees |
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geoligists
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scientists who study the earth
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seismologists
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scientists who study earthquakes
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mid-oceanic ridge
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underwater mountain range
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tsunami
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a monsterous wave caused by earthquakes
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seismology
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scientific study of earthquakes
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fault
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a break at boundry of 2 moving masses of rock
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focus
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point underground where a earthquake begins
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epicenter
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place at ground level above focus recieves most damage
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magnitude
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strength of earthquake
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seismic belt
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reigons of the earth where most earthquakes appear along plate boundries
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magma
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molten rock inside the earth
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magma chamber
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reservoir of magmain volcanoes
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vent
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an opening/crack in the earht surface caused by escping gasses
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volcanoes
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a vent that allows magma and hot gasses to escape from within the earth
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lava
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magma one it has reached the earth's surface
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ring of fire
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volcanic belt around Pacific ocean
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fumaroles
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cracks that are escape holes for gasses (steam)
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tephra
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solid lava chunks -bombs,ash,lapilli
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volcanic ash
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smallest fragment of thephra (dust or tephra)
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crater
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depressions at the top of volcanoes
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sheild volcano
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thin lava oozes out
Hawiian Islands |
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cinder cone
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tephra
paracutin |
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composite
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combo alternating layers
Mt. St. Helens |
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Hawiian(sheild)
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thin lava rivers
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as depth of rock increaces, so does...
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heat
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strombolian
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chuncks of tephra thrown into the air
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plinian
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very violent asot of steam and hot gasses much tephra
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active volcano
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a volcano that has recently erypted or might again
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dormant
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inactive or "sleeping" has not erupted for a long time or not in recorded history and they dont expect it to
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extinct
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not in recorded history of for a very long time
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