science

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Across
  1. 2. How high or low and sound is.
  2. 5. sound waves travel best through
  3. 6. area with a few particles.
  4. 8. needs a medium to travel
Down
  1. 1. area with many particles.
  2. 3. changes a pitch
  3. 4. area with few or no particles, sound can't travel (ex: space)
  4. 7. controls loudness