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19 Cards in this Set
- Front
- Back
Eurasian Plate |
a tectonic plate division of the lithosphere, including most of the landmasses of Europe and Asia |
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Tectonic Plates |
Huge pieces of lithosphere that slowly move on the asthenosphere and consist of the crust and the rigid, uppermost part of the mantle |
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African Plate |
a tectonic plate division of the lithosphere that includes the Continental crust of Africa and the surrounding oceanic crust |
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South American Plate
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A tectonic plate division of the lithosphere that includesthe continental crust of South America and the oceaniccrust extending to the Mid-Atlantic ridge.
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Indo-Australian Plate
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A tectonic plate division of the lithosphere thatincludes the continental crust of India andAustralia and the surrounding oceanic crust.
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Pacific Plate
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A tectonic plate division of the lithosphere that iscomposed entirely of oceanic crust and liesbeneath the Pacific Ocean.
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Antarctic Plate
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A tectonic plate division of the lithosphere thatincludes the continental crust of Antarcticaand the surrounding oceanic crust.
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Density of Plates
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The amount of matter in a given space orvolume; oceanic crust is thinner, but denserthan continental crust.
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Crustal Rock Material
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Crust can be either oceanic, which isthin and dense, or continental, whichis thick and less dense.
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Plate Boundary
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The place where two different plates have contact.
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Convergent Boundary
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Occurs when two tectonic plates movetoward each other and collide.
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Subduction
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The process in which a denser plate is pusheddownward beneath a less dense plate when platesconverge; occurs at continental to oceanic boundariesand oceanic to oceanic boundaries.
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Volcanic Eruptions
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Events in which molten rock spews out from the mantleto the surface of Earth as ash, lava, and gases; majorgeological events that occur when a dense platesubducts below a less dense plate.
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Mountain Building
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Major geological event that occurs whencontinental plates of equal density converge,resulting in mountain chains.
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Divergent Boundary
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Occurs when two tectonic plates move awayfrom each other.
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Spreading Ridges
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Ridges formed from new crustal materialat diverging oceanic plate boundaries
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Ocean Basin
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An area of oceanic crust covered by sea waterand surrounded by areas of continental crust.
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Transform Boundary
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Occurs when two tectonic plates slidepast each other.
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Earthquakes
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Major geological events that occur when platesshift suddenly and release stored energy; frequentoccurrences along all types of plate boundaries.
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