Light and Sound

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Across
  1. 5. a material that does not allow energy to travel
  2. 7. how high or low a sound is
  3. 8. a vibration that can be heard
  4. 9. the ability to do work
  5. 10. bending of light
  6. 12. a form of energy that allows us to see
Down
  1. 1. loudness of sound
  2. 2. allows all light to pass
  3. 3. a material that allows energy to travel
  4. 4. allows some light to pass
  5. 6. bouncing of light
  6. 11. allows no light to pass