What are variables?

Variables are any factor, trait, or part of an experiment that are changed, meausured, or kept the same.

There are three types of variables:

• Independent Variables: What we are changing. (You can only change one thing at a time!)
• Dependent Variables: What we are measuring. (Examples: Length of time, rate of growth, the amount of something you use, etcetera...)
• Controls or Controlled Variables: What we keep the same for comparison and fairness. (Did your independent variable have an impact on your experiment? You need these to compare!!!)

Need a class refresher? Watch the video from class again!