Plate Tectonic
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| Alfred Wegener | proposed the theory of plate tectonics
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| tectonic plates | pieces of the crust and the uppermost part of the mantle that cause changes in Earth's surface by their movement
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| plate tectonics | describes large-scale movements of the Earth's Lithosphere
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| lithosophere | made up of the crust and upper part of the mantle
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| asthenosphere | beneath the lithosphere is part of the upper mantle and is so hot that it is part liquid
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| convection | objects that are heated rise to the top. objects that are cooled sink, process by which heat is transferred by movement
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| Pangea | an ancient super continent that broke up to make the seven continents we have today
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| evidence of Pangea | groups of mountains formed around the same time on each side of the Atlantic Ocean, Mesosauraus fossils found in South America and Africa (fossil and mountain)
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| fault | breaks in Earth's crust that form along plates
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| mid ocean ridges | found huge underwater mountain ranges
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| sea-floor spreading | hypothesis created by Harry Hess that gave more evidence to plate tectonic theory, molten rock form inside the earth rises through the cracks and forms new oceanic crust
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| convergent boundaries | plate collide at boundary (mountains)
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| divergent boundaries | plates move away from a boundary results in sea-floor spreading
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| transform boundary | where plates slide past each other (earthquake)
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| subduction | oceanic crust bends downward and sinks back into the mantle
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| plasticity | the quality of being easily shaped or molded
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SSC 8th LA
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