Wave and Sound Crossword 7E

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Across
  1. 5. the term for sound waves below the human hearing range
  2. 8. The type of wave that does not require a medium to travel.
  3. 10. The medium sound cannot travel through.
  4. 12. The characteristic of sound that depends on the wave's amplitude.
  5. 13. A material through which sound travels.
  6. 16. The substance in which sound travels the slowest.
  7. 17. The SI unit used to measure the amplitude.
  8. 20. The distance between two consecutive compressions in a wave.
  9. 21. The compression and rarefaction of particles in a wave.
  10. 24. The substance in which sound travels the fastest.
  11. 25. The part of a longitudinal wave where particles are close together.
Down
  1. 1. the term for sound waves above the human hearing range
  2. 2. One factor that increases the speed of sound.
  3. 3. The amount of time taken for one wave cycle.
  4. 4. The application of echo.
  5. 6. The term for irregular vibrations that produce unpleasant sound.
  6. 7. The type of wave where particles move parallel to the direction of the wave's motion.
  7. 9. The area in a longitudinal wave where particles are spread apart.
  8. 11. The repetitive back-and-forth motion around a central point.
  9. 14. The reflection of sound waves around obstacles.
  10. 15. The type of wave where particles move perpendicular to the wave's direction.
  11. 18. The frequency range of human hearing, up to about 20,000 ___.
  12. 19. The SI unit used to measure the wavelength.
  13. 22. aquatic mammals use ultrasound for echolocation
  14. 23. The property of sound related to its frequency.