1. Science Expo Presentation

2. Which Sunscreen, 15SPF or 30
SPF, let the most ultraviolet
rays through?

3. Hypothesis
The 30 SPF will block the most
ultraviolet rays

4. Materials

6. Whithout sunscreen

7. Results
The result of the experiment
is the 30 SPF blocked the
most ultraviolet rays.

8. Links
http://www.epa.gov/sunwise/doc/sunscreen.pdf
http://www.cdc.gov/mmwr/preview/mmwrhtml/rr5104a3.htm
http://www.skin-whitening-product.com/sunscreen-facts-and-
myths.html