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  1. Site Map - Continental Drift Questions and Videos | Socratic

    What is the theory of Pangaea? How does Pangaea relate to continental drift? What is Wallace's Line? Which is more buoyant--a continental plate or an oceanic plate? Which would subduct if …

  2. Site Map - Earth's Surface Questions and Videos | Socratic

    What is a mountain belt? What is the size of earth's crust? What type of dune forms at right angles to the wind when there is abundant sand, a |ack of vegetation, and a constant wind …