Challenge it Crossword Puzzle

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Across
  1. 3. a material that a wave travels through
  2. 6. Distance from rest point to crest or trough
  3. 7. a disturbance that transfers energy
  4. 8. wave, A wave that moves perpendicular to the direction of the wave
  5. 9. Lowest points on a wave
  6. 10. Highest point on a wave
Down
  1. 1. Wave, A wave that displaces matter in the direction its traveling
  2. 2. When the particles are close together
  3. 4. When the particles are spread out
  4. 5. The distance from one crest to the next one