How can we identify dependent variables?
A dependent variable is the variable being tested in a scientific experiment.
The dependent variable is 'dependent' on the independent variable. As the experimenter changes the independent variable, the change in the dependent variable is observed and recorded.
A scientist is testing the effect of number of hours spend in gym on the amount of muscle developed. The independent variable is the number of hours in gym (deliberately changed) and the amount of muscles developed is the dependent variable.