Convergent boundary, where two plates collide., Divergent boundary, where two plates move apart., Plate Tectonics, a geological theory well-supported by evidence that Earth's crust and upper mantle are broken into plates that float and move around on the mantle., Subduction, the process in which lithosphere plunges back into the interior of the Earth., Mid-Ocean Ridge, when two oceanic plates separate, the rising magma cools and hardens, Transform boundary, where two plats move past each other horizontally., Continental drift, theory that all continents were once connected in a single, large landmass that broke apart and drifted slowly to their current positions., Pangea, the single land mass formed by joining of all the continents about 200-300 million years ago., Sea-floor spreading, the process in which two undersea tectonic plates move apart and new sea is formed as molten rock within Earth rises through cracks along the mid-ocean ridge., Convection Currents, responsible for the movements of the plates of Earth's crust., Superposition, refers to layers of rocks, where the oldest rock layer is always underneath the newer ones., Fault Line, a fracture, or break, in the Earth's crust (lithosphere) where plates move past each other, Hot Spot, as a tectonic plate moves over a ____ _____, a chain of volcanoes forms.

Plate Tectonics- 7.10AB

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