Waves

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Across
  1. 3. Red-shift Blue-shift
  2. 7. The surrounding particles
  3. 8. The distance between crest/trough to equilibrium
  4. 11. The highest point on a surface wave
  5. 12. Used in mobile phones to send texts
  6. 13. ___________ bone-saw.
Down
  1. 1. What waves can you hear?
  2. 2. Waves that require a medium to travel
  3. 4. How often the particles of the medium vibrate
  4. 5. Does not require a medium to travel
  5. 6. A change in direction from one medium to another
  6. 9. The frequency of a sound wave
  7. 10. East to West