A controlled variable is the thing that is kept consistent in between trials of doing an experiment. e.g: time is kept the same or kept consistent...
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confounding variable
In a controlled experiment, the control variable remains constant while the experimental variable changes with each trial of the experiment.
the experimental variable is like the independent variable, which is the only thing you can change in a science experiment, and the dependent variables are the things that stay the same.
the independent variable is changed, and the experimental value measure. So you control the independent variable and change it to measure the results
control setup