Across
- 3. sound wave becoming density of air particles
- 7. sound wave
- 8. radio waves
- 9. x-rays
- 10. collision of two waves
- 13. pitch of a siren
Down
- 1. visible light
- 2. plucking a guitar string
- 4. air is a...
- 5. water waves bending
- 6. sound waves in the air
- 11. light, sound, and water waves
- 12. gravitational waves
- 14. formation of a rainbow
- 15. water ripples