Which of the following is NOT evidence that a chemical reaction has occurred?
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Any given experiment has numerous control variables, and it's important for a scientist to try to hold all variables constant except for the independent variable. If a control variable changes during an experiment, it may invalidate the correlation between the dependent and independent variables.
It’s copied and pasted from google so make sure to put it in your words :)
It’s copied and pasted from google so make sure to put it in your words :)