Skip to Main Content
It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.
MG21 Virtual Library

Experimental Design: Doing science...

Doing Science



Learn more...

Designing Your Experiment

 focus your question

 define your variables 

  • single independent variable (controlled or manipulated during experiment)
  • dependent variables (variable affected/responded to manipulation of the independent variable)
  • control group (no manipulation, to be used for comparison during experimentation)

 define your factors

 identify your controls

 planning for replication


Well-defined, testable questions

Well-Defined, Testable Questions (Video)

Testable Question = everyday questions, refined with

  • well-defined
  • measurable
  • changing (for experimentation)

Testable Question Frames:  

  • Does changing (the independent variable) affect (dependent variable)?
  • How does changing (the independent variable) affect (dependent variable)?



Library Information and Media Center - Monona Grove High School - Monona, Wisconsin

Answers| Catalog | Guides | Resources | Teachers