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You should only change one at a time. By doing this, you can isolate individual problems and/or improve an experiment. If you do more than one and something is wrong, you dont know which factor created the problem.

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16y ago

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How many factors should an experiment test?

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What is 1 variable that I'm going to change in the experiment electromagnet?

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How many variable events is it best to test in one experiment?

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