Which was the independent variable?
the person running
the speed they moved
the amount of rain collected
The independent variable would be the amount of rain collected.
The independent variable is the variable that is intentionally manipulated or changed by the experimenter. In the given options, the independent variable would be:
- The amount of rain collected
This is because the researcher can control and manipulate the amount of rain collected in order to observe its effect on other variables. The other options, such as the person running or the speed they moved, are not within the control of the experimenter and would be considered dependent variables.