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The main reason that it's important to test only one variable at a time is so that A. qualitative data can be recorded. B. scientists can easily tell which variable caused the results. C. scientists can have many hypotheses tested at once. D. quantitative data can be recorded.

Kristi Hammond

in Chemistry

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Jeremy Wood on March 1, 2018

The answer would be B, because since the scientist is only testing the variables one at a time in the not to be confused with other data. If you test more than one at the same time the data could be mixed, and the data that would end up being bad. I hope this helps!


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