Mechanical waves

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Across
  1. 4. An Area where the particles in a medium are close together
  2. 6. Longitudnal waves travel_______
  3. 8. All mechanical waves must travel through a _______
  4. 9. Transverse waves travel ________
  5. 11. The highest point of the wave
  6. 12. sound that is too high for humans to hear
  7. 13. The unit of frequency
  8. 14. the lowest point of the wave
Down
  1. 1. The Bending of a wave because it changes speed as it enters a new medium
  2. 2. The height of the wave
  3. 3. All waves transfer energy
  4. 5. velocity = ________ x frequency
  5. 7. Occurs when a wave bounces off of a surface
  6. 10. An area where the particles in a medium are spread far apart