7th ap's ss thing c1

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Across
  1. 5. who theorized world not dark place
  2. 8. yes or no was one of the best scientists
  3. 9. invented a certainty type of math we learn today
  4. 10. how did he discover gravity
Down
  1. 1. made the laws of this
  2. 2. used math to explain this
  3. 3. he discovered this
  4. 4. see other planets
  5. 6. did not invent a lot of things true or false
  6. 7. yes or no was a very smart person