Plate Tectonics Across 3. Ocean created when Pangaea broke apart 4. Boundary where two plates are moving past each other 8. Crust and upper mantle 10. Theory that continents move 11. Fossil found in South America & Africa Down 1. Largest layer inside Earth 2. Outer most layer of Earth 5. Huge sections of Earth's lithosphere 6. Composed of iron and nickel 7. Scientist who thought the continents were once one 9. Super continent that existed 200 MYA