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Final answer:

In scientific experiments, the control variable is a crucial element that remains constant to isolate the effect of the independent variable. In the bounce height and temperature experiment, the ruler is a control variable as it does not change.


Explanation:

Control variable refers to a part of an experiment that remains constant to prevent it from influencing the effect of the independent variable on the dependent variable. In the context of the experiment on bounce height and temperature, the control variable would be the ruler used for measuring the bounce height because it does not change throughout the experiment, unlike the temperature, type of ball, or thermometer.


Learn more about Control Variables in Experiments here:

https://brainly.com/question/45510396


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