3) A variable that is kept the same during an experiment is a(n) __________.
A. control variable
B. extraneous variable
C. control group
D. dependent variable
E. independent variable

4) 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

5) 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