waves

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Across
  1. 2. the lowest point of the wave
  2. 5. the transfer of energy from a wave to a medium
  3. 8. need matter to transfer energy
  4. 10. the bending of a wave around the edges of an opening or an obstacle
  5. 11. do not need matter to transfer energy
  6. 12. energy move back and forward matter moves up and down
  7. 13. particles are spread apart
Down
  1. 1. the part of the compressional wave
  2. 3. the change in direction of a wave passing from a medium caused by changed of speed
  3. 4. height of the wave
  4. 6. the horizontal distance between the crest or trough
  5. 7. rhythmic disturbances that carry energy without carrying matter
  6. 9. the highest point