Waves

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Across
  1. 2. what does sound travel in
  2. 5. what can sound waves not travel through?
  3. 6. our______ pick up sound waves
  4. 8. what type of wave is sound
  5. 10. the place on a wave where molecules are close together
Down
  1. 1. what does sound need to travel
  2. 3. the spot on a wave where the molecules are far apart
  3. 4. how many waves pass in one second
  4. 7. how high or low a sound is
  5. 9. what is frequency measured in