A scientist is conducting an experiment to determine if nitrogen affects plant growth. They plant the same types of seeds in identical setups. Set up A receives nitrogen-rich fertilizer and set up B does not. The scientist then measures the height of the plants after 2 weeks and after 4 weeks. Could this be considered a controlled experiment? Define and identify the following: Control group B What's being controlled Experimental group A The experiment Dependent variable Height the height depending on the seeds Independent variable Types of seeds the dependent variable