Hot Air Balloon Vocab

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Across
  1. 3. the engine
  2. 7. power into one direction
  3. 9. nylon base at the envelope
  4. 11. rising up
  5. 13. top of balloon that lets air escapes
  6. 15. compactness
Down
  1. 1. material stitched together into various shapes
  2. 2. force of the flight
  3. 3. container attached to balloon that carries passengers
  4. 4. generated by the physics of using buoyancy
  5. 5. narrow portion of the envelope
  6. 6. to release air or gas
  7. 8. force pulling balloon to the ground but it has buoyancy
  8. 10. to fill balloon with air by
  9. 12. upward force that the air exerts on them
  10. 14. bag that contains heated air