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Across
  1. 2. the relative strength of sound waves, their volume
  2. 6. vibrating forms of energy that are made of molecules and look like waves.
  3. 8. measurement of frequency, named after Heinrich ____
  4. 9. a repetition of sound
  5. 10. the highest point of the wave
Down
  1. 1. the distance traveled by a wave in a certain time
  2. 3. the lowest point of the wave
  3. 4. the number of waves that pass in one second
  4. 5. the rapid back-and-forth movement of particles
  5. 7. sound waves moving around obstacles