Question

1.3.2 test (cst): science and engineering
question 19 of 25
how is a manipulated variable different from a controlled variable?
a. when a controlled variable changes, it causes the manipulated variable to change.
b. a manipulated variable is a factor that must remain constant, but a controlled variable is one that can change.
c. a manipulated variable is a factor that can change. a controlled variable must remain constant.
d. when a manipulated variable changes, it causes the controlled variable to change.

Explanation:

A manipulated variable (independent variable) is changed by the experimenter to observe its effect on other variables. A controlled variable is kept constant to ensure that only the manipulated variable affects the outcome.

Answer:

D. When a manipulated variable is a factor that is changed, but a controlled variable must remain constant.