Science Expo Presentation
Which Sunscreen, 15SPF or 30 SPF, let the most ultraviolet
rays through?
HypothesisThe 30 SPF will block the most
ultraviolet rays
Materials
Whithout sunscreen
Results
The result of the experiment is the 30 SPF blocked the
most ultraviolet rays.
http://www.epa.gov/sunwise/doc/sunscreen.pdf
Links
http://www.cdc.gov/mmwr/preview/mmwrhtml/rr5104a3.htm
http://www.skin-whitening-product.com/sunscreen-facts-and-myths.html