Waves Crossword Puzzle

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Across
  1. 4. The distance from the rest to crest or troug
  2. 6. Moves matter perpendicular to the direction
  3. 8. The middle point of a wave
  4. 9. The highest point of a wave
  5. 10. The lowest point of a wave
Down
  1. 1. Moves matter parallel to the direction of wa
  2. 2. Particles are close together
  3. 3. The distance from one crest to the next
  4. 5. The number of waves that pass a certain poin
  5. 7. Particles are spread apart