Waves

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Across
  1. 7. when particles are scrunched together
  2. 10. when particles are spread out
  3. 11. the bottom of a wave
Down
  1. 1. parallel to the wave
  2. 2. perpendicular to the wave
  3. 3. how many wave cycles appear in a wave
  4. 4. the length of a wave cycle
  5. 5. Waves waves that need matter to travel through
  6. 6. how big a transverse wave is
  7. 8. the top of a wave
  8. 9. matter that waves travel through