Sound corssword

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Across
  1. 2. solid, liquid, and gas
  2. 3. compression waves
  3. 5. slow vibrations
  4. 8. pushed together
  5. 9. High pitch will have a high________
  6. 10. moves back and forth quickly
Down
  1. 1. can only travel through matter
  2. 4. fast vibrations
  3. 6. only thing sound cant travel through
  4. 7. spread apart