Light and Sound crossword

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Across
  1. 3. bending of waves around a barrier
  2. 4. the bending of a wave as it moves from one medium to another
  3. 6. the number of wavelength that pass a given point in 1 second
  4. 7. Every sound is produced by something that does what?
  5. 10. range of electromagnetic waves with different frequencies and wavelengths
  6. 14. a mechanical wave in which matter in the medium moves backward and forward
  7. 16. for a tranverse wave one half the distance between a crest and a trough
  8. 17. a type of wave that can only travel through matter
Down
  1. 1. the human perception of how much energy a sound wave carries
  2. 2. a reflected sound wave
  3. 3. change in the frequency of a sound wave that occurs when the sound source and the listener are moving
  4. 5. occurs when two or more waves combine and form a new wave when they overlap
  5. 8. waves that can travel through matter or space
  6. 9. material through which the wave travels
  7. 11. how high or low a sound is
  8. 12. occurs when a wave strikes an object or surface and bounces off
  9. 13. A rhythmic disturbance that carries energy but no matter
  10. 15. a type of mechanical wave in which the wave energy causes the matter in the medium to move up and down
  11. 18. in a transverse wave the distance between two adjacent crest or troughs