Question

In a controlled experiment, if a researcher wants to examine the effect of radon exposure to rat longevity, which one would be the independent variable?

a) the rats' longevity.
b) the cage the rats were kept in.
c) radon exposure.
d) neither the radon exposure nor the rats' longevity, because both variables are manipulated.

Answer 1

C

Step-by-step explanation:

The radon exposure is the independent variable; independent variable is the variable that we controlled or change while the dependent variable, longevity, is what we measure as a result of the change in the independent variable ( radon exposure)