![]() They are kept the same for every test or measurement in order to make sure that the results can be compared fairly.įor example, let’s say you’re trying to figure out which brand of plant food will help a sunflower grow to the tallest height. Control variables are the factors that you do not change. Dependent variables are things that are affected by the changes that you make-the results of the tests (which depend on the independent variables). Independent variables are the factors that you change. There are three different types of variables: dependent variables, independent variables, and control variables. However, in scientific experiments, some variables are kept the same on purpose-such a variable is called a control variable (or sometimes simply just a control). In general, variables are called variables because they vary. So, for instance, if you’re measuring how effective a medication is, variables could include the amount of dosage, how frequently it’s taken, and the characteristics of each test subject, such as their age and weight. ![]() ![]() In the context of scientific experiments, a variable is any factor that could change or be changed.
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