Waves & Sound

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Across
  1. 4. The bending of a wave as it changes speed
  2. 5. A region where particles are spread apart
  3. 6. A repeating motion that transfers energy through space or matter
  4. 8. The time it takes for one complete wave cycle
  5. 10. The number of waves that pass a point each second
  6. 12. The unit used to measure frequency
  7. 16. The material through which a wave travels
  8. 17. The height of a wave from the resting point to the crest
  9. 18. A wave that can travel through empty space
  10. 19. The bouncing of a wave off a surface
  11. 20. The perceived highness or lowness of a sound
  12. 21. A wave that requires a medium to travel
Down
  1. 1. The spreading of waves around obstacles or openings
  2. 2. The position where the medium is undisturbed
  3. 3. A region where particles are pushed close together
  4. 7. The lowest point of a wave
  5. 9. A wave that moves parallel to its direction of travel
  6. 11. The full range of electromagnetic waves
  7. 13. The highest point of a wave
  8. 14. A wave that moves perpendicular to its direction of travel
  9. 15. The distance between two identical points on a wave