Variables are factors or quantities that may be change or controlled in a scientific experiment. The three types of variables in a science project or experiment are independent, controlled and dependent variables. The independent variable is the condition or factor that is changed in the experiment and can affect the dependent variable.Continue Reading
A dependent variable is a factor that is observed or measured in the experiment. For a plant growth experiment, the maturation time is an example of a dependent variable. In this same experiment, the fertilizer type or temperature can be examples of independent variables.
The third type of variable is a controlled variable. This variable is constant in an experiment. Experiments are repeated a number of times to interpret how a change in the independent variable affects each trial result.Learn more about Chem Lab