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