Tic-Tac Toe Crossword

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Across
  1. 1. Hydrothermal Vent
  2. 2. Plate Tectonics
  3. 3. Divergent Boundary
  4. 4. Convergent Boundary
  5. 5. Desiccation
  6. 6. Asthenosphere
  7. 7. Isostasy
  8. 8. Transform Boundary
Down
  1. 1. Trench
  2. 2. Continental Shelf
  3. 3. Subduction
  4. 4. Continental Drift
  5. 5. Infauna
  6. 6. Zonation
  7. 7. Lithosphere