Scientific method.

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Across
  1. 4. a variable that you change
  2. 6. a comment based on what you've seen
  3. 7. a scientific procedure
  4. 8. a variable that stays the same
Down
  1. 1. asking something
  2. 2. a variable that changed because of an independant
  3. 3. a proposition
  4. 5. collected together for analysis