MLEG1.5

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vocabulary
plates: section of the lithospere that slowly moves over the ansthenosphere, carrying pieces of continental and oceanic crust

scientific theory: well-tested concept that explains a wide range of observations

plate tectonics: theory that pieces of Earth's lithospere are in constant motion, driven by convection currents in the mantle

fault: break in Earth's crust where slabs of rock slip past each other

transform boundary: plate boundary where two plates move past each other in opposite directions

divergent boundary: plate boundary where two plates move away from each other

rift valley: deep valley that forms where two plates move apart

convergent boundary: plat boundary where two plates move towards each other

Outline
A Theory Of Plate Motion: Combine known facts of sea-floor spreading with unknown facts Lithosphere on top of ansthenosphere Flow of currents= moving of Earth's plate Plate Boundaries: Three different types: transform, divergent, & convergent Transform Boundary: Plates slip past each other Divergent Boundary: Plates slip apart Convergent Boundary: Plates collide The Continents' Slow Dance: Plates move slowly=1-10 cm. per year Plates moving= tens of million of years Pangea was born that time