Question

Which of the following best describes control variables?

a. They provide the researcher with control over the independent variable.
b. They are kept the same over multiple trials.
c. They decrease the variability of the experiment.
d. They increase the participants' control over the experiment.

Answer 1

Control variables are parts of an experiment that are kept the same over multiple trials in order to eliminate any factors that could influence the results, other than the independent variable being tested.

Step-by-step explanation:

Control variables are parts of an experiment that are kept the same over multiple trials. They are used to eliminate any factors that could influence the results, other than the independent variable being tested. For example, if a scientist is conducting an experiment to study the effect of temperature on plant growth, they may control variables such as the amount of water, sunlight, and soil type, to ensure that these factors do not interfere with the results.