Jaci wanted to find out what effect classical music had on the growth rate of plants. She planted three identical plants in identical planters. The soil, water, fertilizer, and amount of light were exactly the same for each plant. Plant A was exposed to 15 minutes of classical music each day, Plant B was exposed to 15 minutes of ocean wave sounds, and Plant C was kept in a quiet environment. What are the independent variables and dependent variables in her experiment?

The Independent variable is characterized as the variable that the experimenter controls or changes to observe its effect on the dependent variable. While a dependent variable is a variable that the experimenter is measuring or testing and it and observes the effects caused by the change in the independent variable.

In the given experiment, the 'classical music' is the independent variable that is changed or controlled for three identical plants to observe its impact on the dependent variable 'growth rate.' 'Growth rate' is the dependent variable as it is directly affected by the amount of classical music it receives.