Hanson Dynamic Earth Chapter 3 Vocabulary Words
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| convection current | movement of materials caused by temperature changes
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| convergent boundary | plate boundary where the plates come together
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| divergent boundary | plate boundary where the plates move apart
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| fossil | the preserved remains of an organism
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| lithosphere | topmost solid part of the earth; includes some of the mantle and the crust
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| mid-ocean ridge | undersea mountain chain
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| ocean-floor spreading | old ocean floor is pushed apart and new floor is formed
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| Pangea | name given to the land when it was one big landmass
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| plate | moving pieces that make up the lithosphere
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| strike-slip boundary | plates slide past each other horizontally
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| subduction | crust plunges back into the interior of the earth
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| tectonics | movements of the plates that shape the Earth's crust
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| theory of continental drift | continents are drifting apart
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| theory of plate tectonics | continents are drifting apart and new ocean floor is forming
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| transform fault | fault across a mid-ocean ridge
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| trench | place where old ocean floor is being subducted
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| Alfred Wegener | theory of continental drift; continents had once been joined together and had since moved apart
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| glossopteris | an extinct organism whose fossils provide evidence for continental drift
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| rift valley | a valley formed when the block of land between two normal faults slides downward
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| oceanic plate | thin crust/plate under the ocean
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| continental plate | thicker plates under the continents
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