Sound vocabulary words

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Across
  1. 1. sound travels in what?
  2. 5. when sound waves press together.
  3. 6. Give an example of a medium.
  4. 8. sound can't travel through this.
  5. 9. What kind of wave is a sound wave?
  6. 10. when sound waves separate.
Down
  1. 2. what part of you body can hear sounds?
  2. 3. sound can't travel through a vacuum but they can travel through a ______.
  3. 4. If this didn't exist sound would not exist.
  4. 7. fast moving waves have a ______ pitch.