science challenge thing

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Across
  1. 5. a tall landform
  2. 7. slide past each other
  3. 8. a natural disaster
  4. 10. slide beneath
Down
  1. 1. colliding into each other
  2. 2. move apart
  3. 3. to float away or together
  4. 4. different name for lava
  5. 6. something that erupts lava
  6. 9. a piece of land surrounded by water