For my Biology Lab I have to create a graph showing my results. We used an enzyme, and put in a substrate (H2O2). Every 10, 30, 60, 90, 120, 180, and 360 second H2O2 was killed with acid. To measure the amount of H2O2 we used KMnO4.
Now to the question. I can figure out which is the dependent variable (responds or is measured)H2O2(was measures + responded to acid and enzyme) or KMnO4 (killed H2O2 and was measured)
In this experiment, it seems like the dependent variable would be the amount of H2O2. The reason for this is that the H2O2 is being measured and responded to by the acid and enzyme. The KMnO4, on the other hand, is used to measure the amount of H2O2, so it is the independent variable.
To explain further, the dependent variable is the one that is being observed, measured, or responded to in an experiment. It is usually affected by changes in the independent variable. In this case, the amount of H2O2 is being measured and is being affected by the actions of the acid and enzyme.
The independent variable, on the other hand, is the one that is intentionally manipulated or changed by the experimenter. It is the variable that is believed to have an effect on the dependent variable. In this case, the KMnO4 is the independent variable as it is being used to measure the amount of H2O2, but it is not directly causing any changes to the H2O2 itself.
By identifying the dependent and independent variables, you can analyze and interpret the data from your experiment more effectively.