To accurately identify the dependent and independent variables, as well as the constants in your experiment, I would need specific details about the experiment you are referring to.
Typically, the independent variable is the one that is manipulated or changed by the researcher, while the dependent variable is the outcome that is measured to assess the effects of the independent variable. Constants are the factors that are kept the same throughout the experiment to ensure that any changes in the dependent variable can be attributed to the independent variable.
If you provide more information about the experiment, I can help you determine these components!