Properties of waves

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Across
  1. 3. The area of a wave that is completely straight in a wave
  2. 8. A wave that goes left and right
  3. 9. the highest point in a wave
Down
  1. 1. the are of a wave where matter is more spread apart
  2. 2. the area of a wave where matter comes together
  3. 4. the time it take for a wave to travel form a crest to a trough then to restpoint
  4. 5. A wave that goes up and down
  5. 6. the length of a wave from rest position
  6. 7. the length from trough to trough or crest to crest
  7. 10. the lowest point in a wave