Sound

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Across
  1. 3. What has no particles in it?
  2. 5. Sounds are made when things do what?
  3. 8. What unit of measurement is used to measure wavelengths?
  4. 9. Which part of the ear receives sound waves?
  5. 11. What type of sound wave is an echo?
  6. 12. What unit are frequency and pitch measured in?
Down
  1. 1. Which part of the ear turns the ear bone vibrations into electrical signals?
  2. 2. What nerve carried electrical signals from the ear to the brain?
  3. 4. Speed is distance divided by what?
  4. 6. What controls the volume of sound?
  5. 7. What device is used to measure sound waves?
  6. 10. What is the unit called that measures sound?