Variables

Independent variable: The one that we change. In this experiment we are going to change the different products that we add to the bacteria (this products are going to be our independent variable)

Controlled variable: The one that is always the same. The products we add to the bacteria will be always the same amount () and the type of bacteria won't change neither (e-coli)

Dependent variable: The one that changes depending on the independent variable. In this case, what will change deending on the products we add will be the pH of the bacteria and at which point they will denaturise or dehidrate.