tectonic plates - Earth’s entire surface, including the ocean floor and the continents, is broken into large moving pieces., mid-ocean ridge - a giant continuous mountain range under water., Pangaea - about 280–245 million years ago, all the continents were joined into a supercontinent, sea-floor spreading - a process in which new ocean floor is created as molten material from the earth's mantle rises in margins between plates or ridges and spreads out., fossils - are the traces or remains of organisms that lived long ago., Alfred Wegener - a German meteorologist, geophysicist and polar researcher. In 1915 he published 'The Origin of Continents and Oceans', which outlined his theory of Continental Drift., plate tectonics - is the Theory that describes how Earth’s outer layer is broken up into moving tectonic plates., divergent plate boundary - plate boundary is a linear feature that exists between two tectonic plates that are moving away from each other., convergent plate boundary - an area on Earth where Energy from deep within Earth drives temperature and density differences in Earth’s interior. Along with gravity, this causes the mostly solid interior to slowly cycle. two or more lithospheric plates collide., transform boundary - a fault zone where two plates slide past each other horizontally., subduction - the action or process in plate tectonics of the edge of one crustal plate descending below the edge of another., convection currents - Energy from deep within Earth drives temperature and density differences in Earth’s interior. Along with gravity, this causes the mostly solid interior to slowly cycle.,

Plate Tectonics

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