Waves

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Across
  1. 3. What is a wave that makes the particles of a medium move back and forth parallel to the direction the wave travels?
  2. 4. What term means at right angles?
  3. 5. What is a wave that travels only through matter?
  4. 6. What unit is frequency measured in?
  5. 8. What is the distance between a point on one wave, such as the crest, and the same point on the next wave?
  6. 10. What is the change in direction of a wave as it changes speed, moving from one medium into another?
  7. 12. What is a wave that can travel through empty space or through matter?
Down
  1. 1. What term means like a machine?
  2. 2. What is a wave in which the disturbance is perpendicular to the direction the wave travels?
  3. 7. What is the number of wavelengths that pass a point each second?
  4. 9. What is the maximum distance a wave varies from its rest position?
  5. 11. What is a disturbance that transfers energy from one place to another without transferring matter?