Designing an Experiment: Testing the Effectiveness of Different Sunscreens Against UV Rays

Assignment Instructions:
Let’s practice using the scientific method: I want to know which sunscreen is the best sunscreen to use to protect from harmful UV rays. I have 5 different types/brands to try. Thankfully, there are beads that I can purchase that react to UV light.  They are clear until exposed to UV light, then they turn bright colors.  In my experimental setup, I will have 6 groups. One group will be the control group and will consist of only beads and no sunscreen. The other 5 groups will consist of beads and one type of sunscreen applied to the beads.
To do:
Post to the Discussion Board and include the four components below:
Name the independent variable in my example UV bead experiment.
Name the dependent variable in my example UV bead experiment.
Name one controlled or standard variable in my example UV bead experiment.
Describe an experimental design and setup to test a product of your choice (and not the UV bead experiment).  Make sure to identify the independent, dependent, and standard variables.  Comment on one of your classmate’s experimental setup.  You can identify another control, standard variable, or possible improvement to their design.
Rubric:
This criterion is linked to a Learning OutcomeExperimental Design
10 pts
Full Marks
Experimental design is complete and includes hypothesis. Independent, Dependent and control variables are identified.
6 pts
Competent
Experimental design is mostly complete and/or there are some grammatical problems.
2.5 pts
Improving
Experimental design is attempted but information is incomplete and/or there are grammatical problems.
0 pts
No Marks
No attempt.
10 pts
This criterion is linked to a Learning OutcomeVariable Identification
10 pts
Full Marks
Identified all variables correctly.
7.34 pts
Competent
Identified most variables correctly.
4 pts
Improving
Identified some variables correctly.
0 pts
No Marks
No attempt.
10 pts
This criterion is linked to a Learning OutcomeFeedback to classmate
5 pts
Competent
The post was related to experimental design and offered question or information.
5 pts
Full Marks
Provided substantive information in post – identified some improvement to the experimental design.
2.5 pts
Improving
The post was not substantive. EX – good job on this setup.
0 pts
No Marks
5 pts