1. For this science fair project, the independent variable is the type of  nail polish used on the participants – normal nail polish, long lasting nail polish and Teflon-infused nail polish. The dependent variable is the chipping of the nail polish over time. This is determined by inspecting the nails with a magnifying glass every 12 hours. The constants (control variables) are the gender and age of the participants and the method of applying the nail polish, as well as the brand of nail polish (this means that you need to pick a brand that comes in all 3 forms .....