Emma’s crossword puzzle

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Across
  1. 4. a medium is a solid, liquid, or gas, vibrations need these in order to travel.
  2. 5. for vibrations to travel.
  3. 8. a type of energy that need to travel through a medium.
  4. 9. how high or low a sound is.
  5. 10. high frequency and short wavelength.
Down
  1. 1. what a sound vibrates through
  2. 2. how many times something passes in that amount of time.
  3. 3. a wave that is pressed tightly together.
  4. 6. a longitudinal wave that is spread apart .
  5. 7. low frequency and long wavelength.