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Pangaea a supercontinent that existed about 200 million years ago
continental shelf is an underwater part of a continent that extends under shallow water from the edge of the land down to a steeper slope
theory of plate tectonics in the late 1960 scientist expanded Alfred Wegener idea of drifting continents and proposed
tectonics plates the theory of plate tectonics states that earths crust and upper mantle are broken into enormous slabs.
mantle the layer of earth between the crust and the core.
Created by: lizzie11