"The things that are changing in an experiment are called variables. A variable is any factor, trait, or condition that can exist in differing amounts or types. An experiment usually has three kinds of variables: independent, dependent, and controlled" - Science Buddies. 1. Take a picture of your variable chart. 2. Using the App of your choice, clearly explain your independent variable, dependent variable, and controlled variables. If you have a control group, include your control group. 3. Upload to your Seesaw Learning Journal.