Plate tectonic crossword

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Across
  1. 2. Warm air heating up, rising, cooling down, sinking, and repeat
  2. 3. Coming closer together
  3. 4. A meal made of two pieces of bread
  4. 7. The person who thought of continental drift
  5. 8. A oceanic plate going under a continental plate
  6. 9. The act of changing
Down
  1. 1. A cucumber soaked in vinegar
  2. 3. The largest land rodent
  3. 5. Being different or developing in different directions
  4. 6. A objects mass times its weight