Sound

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Across
  1. 3. The loudness or volume of a sound.
  2. 5. A completely empty space with no particles.
  3. 9. An instrument which shows a picture of a wave on a screen.
  4. 13. The distance between the top of one wave and the top of the next.
  5. 14. Half the height of a wave.
  6. 16. A way of transferring energy. Waves can be side to side or backwards and forwards movements.
Down
  1. 1. Move backwards and forwards.
  2. 2. The number of waves each second.
  3. 4. How high or low a note sounds.
  4. 6. The part of the ear that changes vibrations into electrical impulses.
  5. 7. How loud a sound is; the volume of a sound.
  6. 8. (Hz) The unit for frequency.
  7. 10. How high or low a note sounds.
  8. 11. A thin membrane inside the ear which vibrates when sound reaches it.
  9. 12. Unit for measuring the loudness of a sound.
  10. 15. Electrical signal carried by a nerve cell.