Across
- 4. when a plane flys smoothly
- 7. a push violently in one direction.
- 9. F=MA.
- 10. when you poke someone and they poke you back
- 13. von braun
- 14. has pro in the name
- 17. have "th" in the name and can be on rockets.
Down
- 1. it is like sleeping until someone wakes you up
- 2. Goddard.
- 3. measured in newton-second.
- 5. pressure is the center
- 6. when a plane starts to shake
- 8. something that flys high in the sky
- 11. gravity is in the center.
- 12. rhymes with flag slows down a rocket.
- 15. when a rocket first takes off.
- 16. how fast you can run in one direction.