Science review

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Across
  1. 2. sound waves that bounce off their source
  2. 4. science of sound
  3. 10. a man-made technology to see inside an organ
  4. 11. rapid back and forth movement
  5. 12. the quality of a sound
Down
  1. 1. the part of a sound wave that is pressed together
  2. 3. the number of waves that pass a point in a second
  3. 5. a man-made technology to bounce sound waves to detect ships
  4. 6. vibration that can be heard
  5. 7. the distance between one compression and the next
  6. 8. the intensity of a sound
  7. 9. how high or low a sound is