waves crossword

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Across
  1. 6. does not need medium to travel through light.
  2. 8. The throwing back by a body or surface of light, heat, or sound without absorbing it.
  3. 10. Distance a wave has traveled before beginning a new circle.
  4. 12. something that comes energy from one place to another.
  5. 13. the distance between normal/middle and a high/low
Down
  1. 1. moves parallel to the direction of the wave.
  2. 2. Number of waves that pass a given point in a set amount of time.
  3. 3. has to have a medium to travel through sound.
  4. 4. Substance a wave travels through.
  5. 5. It travels through a medium through another.
  6. 7. moves perpendicular to the direction of the wave.
  7. 9. the lowest part of the wave.
  8. 11. the highest point of a wave.