plate boundaries crossword

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Across
  1. 1. The last name of the scientist who discovered the continental drift theory
  2. 4. The downwards movement of a more dense plate at convergent boundaries
  3. 7. the earth's crust is made up of
  4. 8. When two plates separate
  5. 9. The crust and the upper mantle together
Down
  1. 2. Occur at transform boundaries when two plates are caught and suddenly break free
  2. 3. When two plates come together
  3. 5. The third layer of the Earth's layers
  4. 6. When two plates slide past each other