Across
- 1. Wave/ Causes the air to vibrate
- 4. One full wave
- 5. Highest point
- 8. Middle point
- 9. Wave Vibration
- 12. Lowest point
- 14. When molecules spread apart
- 16. Waves/ Require Physical Medium
- 17. Forward vibration of the molecules ahead1
- 18. Waves/ Don't require physical medium
- 20. Three materials
Down
- 2. Loudness
- 3. Period/ How long it takes to complete a cycle
- 4. Interference/ When amplitudes are in the same direction
- 6. in Spaces
- 7. Electromagnetic
- 10. Wave/ Causes medium to move perpendicular
- 11. Amplitudes/ Causes wave interference
- 13. 1-period12
- 15. Equalibrium
- 19. Rainbow