Sound Waves Crossword

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Across
  1. 2. What does sound transfer?
  2. 6. Do sound waves travel forwards or sideways?
  3. 8. An area or space where no atoms exist
  4. 11. All objects are made of these
  5. 12. How often something happens
  6. 13. Musical sound frequency
  7. 14. Humans have been here but sound does not travel
  8. 15. What vibrates inside of your ear
Down
  1. 1. What do particles do when they make sound?
  2. 3. Part of our body which detects sound
  3. 4. State of matter which sound travels slowly through
  4. 5. The length of a wave
  5. 7. How does sound travel to us?
  6. 9. A high frequency sound wave to scan unborn babies
  7. 10. State of matter which sound travels fastest through