Sound Travel

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Across
  1. 1. / a material that can be seen or touched
  2. 3. / created by vibrations that move through air, water or solids
  3. 4. / vibrating energy that looks like waves
  4. 6. / the rate at which something moves
  5. 8. / a movement that produces sound
  6. 9. / invisible mixture of gases
  7. 10. / measured in distance
Down
  1. 2. / caused by the reflection of sound waves
  2. 5. / to take in energy
  3. 7. / can use this to make objects