Question

Sarah wants to know which brand of nail polish lasts the longest without chipping. She buys 4 types of nail polish – Essie (which she normally uses,) Butter, OPI, and Sally Hansen. Every Sunday for 4 weeks she paints her nails with a different brand of polish and records how many days she lasts before she gets her first chip. She makes sure to use the same bottom coat and top coat with each type of polish, and she makes sure to do the same weekly routine each week so that her nails aren’t getting treated more roughly different weeks.

1. Brand of nail polish Dependent Variable
2. How long it takes to chip Constant
3. Weekly routine Control Group
4. Original nail polish (Essie) Independent Variable

Answer 1

The subject of this question is Biology, specifically conducting an experiment to test which brand of nail polish lasts the longest without chipping.

Step-by-step explanation:

The subject of this question is Biology.

In this experiment, Sarah is testing different brands of nail polish to determine which one lasts the longest without chipping. She uses four different brands - Essie, Butter, OPI, and Sally Hansen - and records how many days it takes for each brand to chip. The brand of nail polish is the dependent variable because it is the factor that is being measured and observed.

The independent variable in this experiment is the original brand of nail polish - Essie - that Sarah normally uses. She changes this variable each week to test the other brands. The constant in this experiment is the length of time it takes for the nail polish to chip. Sarah records this value to compare the different brands. The control group in this experiment is the weekly routine that Sarah follows. She ensures that she follows the same routine each week to eliminate any other variables that could affect the results.