wave to me

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Across
  1. 3. if the vibration is at right angles opposite to the direction of travel
  2. 4. low point of a wave
  3. 6. waves in matter
  4. 9. a single wave cycle
  5. 10. particles spread apart
Down
  1. 1. high point of a wave
  2. 2. when the vibration is paralell to the direction of travel
  3. 5. the distance between corresponding parts of two sequential wave forms
  4. 6. the matter through which waves travel from place to place
  5. 7. particles of travel
  6. 8. periodic changes that transmit energy from one place to another