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