1) A variable that is purposefully changed in an experiment is a(n) . A .control group
B. independent variable
C. control variable
D. extraneous variable
E. dependent variable

2) A variable that is changed, depending on the change in the independent variable is a(n) .
A. dependent variable
B. control variable
C. control group
D. extraneous variable
E. independent variable

3) Based on what you know, how would you improve Jose's running experiment?

A. He could improve his running experiment using repetition.
B. He should try another running field.
C. He should take another lap.
D. He should try another pair of running shoes.