500
A physical science students is given this lab scenario to evaluate for IV, DV, control group, and constants.
George wanted to see if the amount of minerals in the soil effects the growth of his ferns. He plants ten plants in soil with no added minerals, ten plants in soil with a few minerals, and ten plants in soil with a lot of minerals. He measured the height of his ferns with a ruler after 2 weeks.
What is amount of minerals (IV - independent variable), growth of plant or plant height (DV - dependent variable), plants with no minerals (control group), and type of plant, type of minerals used, amount of light and water, time before measuring, temperature of the plants.... (constants).