Sci Method Crossword puzzle

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Across
  1. 2. baceline
  2. 4. problem
  3. 6. measured
  4. 8. unchanging
  5. 10. guess
  6. 12. numbers
  7. 15. physical
Down
  1. 1. directions
  2. 3. test
  3. 5. results
  4. 7. curiosity
  5. 9. theory
  6. 11. changed
  7. 13. observation
  8. 14. examine