Across
- 2. going up
- 7. makes a plane fly
- 9. keeps us from floating away
- 11. makes you float down.
- 13. heaviness
- 14. steers a boat or airplane.
- 15. body of an airplane
- 17. inventers of the airplane
Down
- 1. 2 wings on each side
- 3. hot air balloon
- 4. inventors of the hot air balloon
- 5. in a blimp
- 6. NASA
- 8. The higher, the less air
- 10. where you sit in a hot air balloon
- 12. vehicle in the air
- 16. Hindenburg(zeppelin)