Hot Air Balloons

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Across
  1. 3. energy creating movement
  2. 5. rising through the air
  3. 9. the action of flying through the air
  4. 11. bottom part of balloon that carries passengers
  5. 12. lets air escape so balloon can descend
  6. 13. the balloon
  7. 14. allows balloon to overcome gravity and rise into the air
Down
  1. 1. opening at bottom of balloon
  2. 2. to fill with air or gas so that it becomes enlarged
  3. 4. propels hot air up into the envelope
  4. 6. nylon at the base of the envelope
  5. 7. fabric used to construct the envelope (balloon)
  6. 8. act of moving back down
  7. 10. force that attracts a body to the earth
  8. 11. upward force that air exerts