Across
- 3. how fast a wave oscillates
- 4. a wave ______ is the term for whatever carries a wave
- 5. the first manned flight to land on the surface of the moon
- 8. a device that splits light into a spectrum for analysis
- 11. the german man that helped make the US the leader in space exploration
- 12. a single rise or depression in a wave
- 14. the highest point of a wave
- 16. the first American to orbit the earth
- 17. the father of modern rocketry
- 18. a back-and-forth motion that repeatedly follows the same path
- 20. the first man on the moon
- 21. the turning back or turning aside of a wave when it hits an object
Down
- 1. the lowest point of a wave
- 2. the scientist that made the reflecting telescope
- 5. the ______ and Gemini programs helped advance the US during the space race
- 6. the movement of energy from one place to another
- 7. the first American in space
- 9. a telescope that uses mirrors to create an image
- 10. the first artificial object in space
- 13. a telescope that uses lenses to create an image
- 15. waves made of an electric field and a magnetic field
- 19. the first man in space