Choice board cross puzzle

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Across
  1. 3. Reversal
  2. 5. Boundaries
  3. 6. Spot
  4. 9. Drift
  5. 10. of Plate Tectonics
  6. 12. Boundaries
Down
  1. 1. Valley
  2. 2. Boundaries
  3. 3. Ridge
  4. 4. Plates
  5. 7. Current
  6. 8. Core
  7. 11. Core