chapter 10, crossword

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Across
  1. 3. how fast a wave travels
  2. 4. spectum of light
  3. 8. lowest point of a wave
  4. 9. the rate of which a wave passes by a point
  5. 10. highest point of a wave
  6. 11. the power output of a star
  7. 14. how to measure how far a star appears to move
Down
  1. 1. length of one crest to another
  2. 2. one crest, and one trough
  3. 5. how fast light travels
  4. 6. how bright the star appears
  5. 7. way part of a galaxy, and also a candy bar
  6. 12. system earth is located in a...
  7. 13. another solar systems sun