Sound Wave crossword puzzle

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Across
  1. 5. A sound wave needs a ____ to travel through
  2. 8. what is the waves that cause the medium to move perpendicular to the direction of the wave
  3. 11. Sound travels fastest through ____
  4. 12. What's and example of a sound wave
  5. 13. The bottom of the wave is call a _____
  6. 14. When an ambulance passes by you, the ____ will be lower because the wavelengths will be longer.
  7. 15. The _____ of a wave determines its pitch.
Down
  1. 1. What's another word for speed
  2. 2. What's and example of a Longitudinal wave
  3. 3. To measure wavelength on a longitudinal wave, you can measure from compression to____
  4. 4. What's the change in direction of a wave passing from one medium to another caused by its change in speed.
  5. 6. When we measure crest to crest or through to through it gives us the ____
  6. 7. What is frequency Measure in
  7. 9. What determines the loudness of a sound.
  8. 10. The top of a wave is call a ____