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Dermatology Science Fair Project

Sunscreen Effectiveness

Sunscreen Effectiveness | Science Fair Projects | STEM Projects
Sunlight contains ultraviolet radiation, which can cause skin damage. Sunscreen lotions can help protect us from this radiation. In this project, you'll test different sunscreen products to see which ones are most effective at blocking UV radiation.


The hypothesis is that sunscreen products with a higher SPF value are able to block a larger amount of UV radiation from the sun, and are thus more effective.

Method & Materials

You will divide sunscreen products into 3 groups according to their SPF value, clean 16 sheets of glass, coat the glass sheets with a layer of the sunscreen, place the wooden box in a suitable open area that has direct sunlight, and measure the UV index readings.
You will need 16 sheets of glass, 5 brands of sunscreen with SPF 15, 5 brands of sunscreen with SPF 30, 5 brands of sunscreen with SPF 50, 1 UV meter, 1 bottle of glass cleaner, a box of disposable gloves, 1 piece of cloth, a pair of thick safety gloves, and 1 wooden box with no covering on the top.


After comparing the UV index of the 15 test groups, it was observed that there was a significant difference in the level of UV radiation detected for sunscreen products that had SPF 15 and SPF 30 protection. On the other hand, there was no significant difference in the UV level detected for the SPF 30 and SPF 50 sunscreen products.

Why do this project?

This science project is interesting because it allows students to test the effectiveness of different sunscreen products in blocking UV radiation. It also teaches students about the different types of UV radiation and how they can be harmful to our skin.

Also Consider

Variations of this project include repeating the experiment at different times of the day, repeating the experiment indoors using a UV lamp, and comparing the difference in UV radiation emitted by old CRT (cathode ray television) screens and LCD (liquid crystal display) screens.

Full project details

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

Related videos

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