Question

1.3.2 test (cst): science and engineering
question 7 of 25
how is a controlled variable different from a responding variable?

a. a controlled variable changes throughout an experiment, but a
responding variable stays the same.

b. a controlled variable stays the same due to changes in the
responding variable during the experiment.

c. a controlled variable changes due to changes in the responding
variable during the experiment.

d. a controlled variable stays the same throughout an experiment,
but a responding variable changes.

Explanation:

To solve this, we recall the definitions of controlled and responding variables in an experiment. A controlled variable (also called a constant) is kept the same throughout the experiment to ensure a fair test. A responding variable (dependent variable) changes in response to the independent variable.

• Option A: Incorrect. Controlled variables stay the same, responding variables change.
• Option B: Incorrect. Controlled variables are kept constant by the experimenter, not due to responding variable changes.
• Option C: Incorrect. Controlled variables do not change; they are held constant.
• Option D: Correct. It matches the definitions: controlled variable is constant, responding variable changes.

Answer:

D. A controlled variable stays the same throughout an experiment, but a responding variable changes.