Waves

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