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Physics 8 Online
OpenStudy (anonymous):

In a scientific experiment, which of the following can you do? A. Allow many variables to change during the experiment. B. Control only one variable. C. Gather data on at least three variables. D. Only test one variable at a time.

OpenStudy (anonymous):

Only test one variable at a time so that any change in the results can be attributed to a change in that variable, and not any others, because you've controlled them

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