Sound Waves

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Across
  1. 2. Wave that don't need a medium
  2. 4. The compressed part of a longitudinal wave
  3. 5. Sound Can't travel through
  4. 7. Needs to travel through a medium
  5. 8. Is a longitudinal wave
Down
  1. 1. How many waves there are in a time
  2. 3. The part of a longitudinal where the particles are separated
  3. 6. A substance waves travel through