Pangea -  The name of Earth’s continents when they were once joined in a single landmass., Alfred Wegener - Proposed a hypothesis known as continental drift., Convergent Boundary - Where the plates move toward each other., Divergent Boundary - Where plates move away from each other., Transform Boundary - Where plates move past each other, Continental Drift Theory - the hypothesis that the Earth's continents have moved over geologic time relative to each other, thus appearing to have "drifted" ..., Mid ocean ridge - Underwater Mountain ranges., Subduction zone - a collision between two of Earth's tectonic plates, where one plate sinks into the mantle underneath the other plate., Plate Tectonic Theory - the outer most layer of the Earth (lithosphere) is divided into contiguous sections (plates) that move relative to each other causing continental drift, seafloor spreading, and the formation of major physical features of the Earth’s surface., ocean trench - steep depressions in the deepest parts of the ocean,

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