## Hands-On-Physics
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## Extensions |
## - Design Guide - |

Once you have chosen the independent variable (cause) and the dependent variable (effect), you can decide how the change the independent variable (like the number of wheels) and how to measure the dependent variable (like the distance traveled). It is a good idea to set up a table for recording measurements as you change the independent variable. A graph helps with the visualization of the relationship and may lead to a mathematical model.

Plan your extension so your report will have diagrams, tables, graphs, calculations, and equations.

Talk through your ideas with your teacher and make a plan before you begin to experiment. Once experimentation starts you will probably want to revise your original plan.