Waves

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Across
  1. 2. A vertical wave.
  2. 3. Vibrations that travel through the air.
  3. 5. When a wave bounces off a surface.
  4. 9. The difference between crests.
  5. 10. Not able to be seen through.
  6. 11. The lowest point in a wave.
  7. 12. The height of a wave.
  8. 13. When waves go in different directions.
Down
  1. 1. Able to be seen through.
  2. 4. A substance that some waves pass through.
  3. 6. The highest point in a wave.
  4. 7. Electromagnetic waves that travel through the air.
  5. 8. A horizontal wave.