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Plate Tectonics

TermDefinition
Pangaea the supercontinent that formed 300 million years ago and that began to break up 200 million years ago
Sea-flooring spreading the process by which new oceanic lithosphere sea floor forms when magma rises to Earth's surface at mid-ocean ridges and solidifies, as older, existing sea floor moves away from the ridges
Plate tectonics the theory that explains how large pieces of the lithosphere, called plates, move and change shape
Tectonic plates a block of lithosphere that consists of the crust and the rigid , outermost part of the mantle
Convergent boundary the boundary between tectonic plates that are colliding
Divergent boundary the boundary between tectonic plates that are moving away from each other
Transform boundary the boundary between tectonic plates that are sliding past each other horizontally
Created by: user-1855767
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