Waves!

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Across
  1. 1. Distance from one crest to the next
  2. 3. High-density areas in longitudinal waves
  3. 4. Low points in transverse wave
  4. 6. Perpendicular to direction of vibrations
  5. 9. the amount of waves that has passed in a certain amount of time
  6. 10. Parallel to direction of vibrations
Down
  1. 2. Distance from rest position to crest/trough
  2. 5. Low-density areas in longitudinal waves
  3. 7. High points in transverse wave
  4. 8. A disturbance that transfers energy