scientific method crossword puzzle

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Across
  1. 2. remains unchanged in an experiment
  2. 4. variable that is changed in an experiment
  3. 5. Idea used to explain facts or events
  4. 6. prediction or educated guess
  5. 7. condition in an experiment that can be changed
Down
  1. 1. the variable that changes due to the independent variable
  2. 3. fair test in which a control is identified and variables are measured to test a hypothesis