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science
b1
| Term | Definition |
|---|---|
| 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. |