Search for Science Fair Projects

1000 Science Fair Projects with Complete Instructions

Dermatology Science Fair Project

Testing Sunscreen Protection

Testing Sunscreen Protection | Science Fair Projects | STEM Projects
We're testing the effectiveness of sunscreen against UV light by using bacteria as a substitute for human skin. We'll measure the percent survival of the bacteria to see how well the sunscreen works.


The hypothesis is that sunscreens with higher SPF values provide greater protection.

Method & Materials

You will inoculate Petri dishes with bacteria, cover them with Saran wrap and sunscreen, and then expose them to UV light. After two weeks, you will perform a colony count of the bacteria that survived the exposure to the UV light.
You will need Escherichia coli, Petri dishes, Saran wrap, sunscreen, aluminum foil, a UV lamp, and a hockey stick.


The results of the experiment showed that the sunscreen was effective in protecting the bacteria from the UV light. The sunscreen with the higher SPF value provided greater protection.

Why do this project?

This science project is interesting and unique because it uses bacteria as a substitute for human skin to test the efficacy of sunscreen.

Also Consider

Variations to consider include testing different brands of sunscreen and testing the duration of exposure for different brands.

Full project details

You can find additional information and details for this science fair project here. Have fun exploring!
Share this Science Project:

Related Science Fair Project Ideas

Sweaty Shoes and Bacteria
Have you ever noticed a strong smell when someone takes off their shoes? Find out why and how to reduce it in this science project!
Sunscreen Soap and UV Radiation
Does the concentration of Octyl salicylate in soap mixtures affect the amount of UV radiation blocked? Find out in this science project!
Does Shampoo Affect Hair Strength?
Does your shampoo make your hair stronger? Find out by testing different shampoos to see which one gives your hair the most strength!
Share this Science Project: