A student wanted to test how the mass of a paper airplane affects the distance the paper airplane will fly. Paper clips were added before each test flight. As each paper clip was added, the plane was tested to determine how far it would fly. What is the independent variable?
3 answers
what is the only thing that you can change? In fact, the description names the one thing you can change from test to test.
whats the control group
The amount of paperclips