Across
- 2. of pressure: force
- 4. composed
- 6. force
- 7. Position
- 9. pressure
- 11. third law of motion: opposite reaction
- 12. push
- 13. Robert H. Goddard: engineer
Down
- 1. impulse: duration
- 3. tube-like
- 4. rising
- 5. chemical reaction
- 8. small rocket
- 10. von Braun: aerospace engineer