Nature of science

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Across
  1. 4. repeating over and over
  2. 5. exact, numbers
  3. 6. this under the crust
  4. 8. The variable I change
  5. 9. when someone else tries to do what you did
Down
  1. 1. The results variable
  2. 2. variable all the unchanged variables
  3. 3. quality, descriptive
  4. 7. the top layer of the Earth