Question

1.16 practice quiz: experimental design: observations, v
11 of 12
which type of variable must always stay the same and is used for comparison?
independent variable
dependent variable
control variable
experiment group

Explanation:

In an experiment, a control variable is kept constant throughout to serve as a baseline for comparison. The independent variable is manipulated, the dependent variable is measured in response to the independent variable, and the experiment group receives the treatment or manipulation.

Answer:

C. Control variable