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the plasticlike layer below the lithosphere

continental drift

continents have moved slowly to their current locations

convection current

entire cycle of heating, risisng, cooling, and sinking


two parts combined


all land


move on a plasticlike layer of the mantle

plate tectonics

earth's crust and part of the upper mantle are broken into sections

seafloor spreading

The process that creates new sea floor as plates move away from each other at the mid-ocean ridges

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