Plate Tectonics Crossword

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Across
  1. 2. A plate boundary that makes the plates slide against each other
  2. 7. Causes the movement of the Earth's plates
  3. 9. A theory proposed by Alfred Wegener that proposed that all the continents were together at some point in time (2 words)
  4. 10. A plate boundary that makes the plates move away from each other
Down
  1. 1. A layer of rock which forms the continents (2 words)
  2. 3. A theory that states that the Earth's outer crust is divided into several plates (2 words)
  3. 4. A thin layer of crust that underlies the ocean basins
  4. 5. A chain of volcanos that surround the pacific ocean (3 words)
  5. 6. A plate boundary that makes a less dense plate go over a denser plate
  6. 8. A plate boundary that makes the plates collide into each other