wave properties crossword puzzle

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Across
  1. 2. rapid motion of the particles
  2. 4. form of radiation
  3. 7. water
  4. 8. waves that need a medium
  5. 9. non-periodic signal
  6. 10. length of a wave
Down
  1. 1. repeating
  2. 3. motion in which all points on a wave oscillate
  3. 5. vibration of the medium is parallel
  4. 6. travel more slowly through Earth material