Vocab3

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Across
  1. 2. cardio
  2. 5. study of the earth
  3. 6. lava rock
  4. 7. hollow rock filled with crystals
  5. 9. need for fire
  6. 10. in the air
Down
  1. 1. goes easily in air
  2. 3. fireworks
  3. 4. put air in
  4. 8. heat from the earth