A student wanted to look at germination of five different seeds in vermiculite (a soil additive). He planted the seeds in identical containers and left them together in full sunlight. He gave each seed the same amount of water and charted the germination of each seed type. What is the dependent variable in this experiment? vermiculite germination rate seed type light amounts of water Solution Germination Rate is Dependent variable. Because its value depends on all other factors like seed type, vermiculite, water , and light..