Waves

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Across
  1. 2. a wave that must travel through a solid, liquid, or gas
  2. 5. the distance from one crest to another
  3. 7. a high point
  4. 8. a wave that moves matter parallel to the direction of the wave
  5. 10. the material a wave travels through to transport energy
Down
  1. 1. a high-density area in a longitudinal wave
  2. 3. the distance from the rest position to the crest/trough
  3. 4. a low-density area in a longitudinal wave
  4. 6. a wave that moves matter perpendicular to the direction of the wave
  5. 9. a low point