Monday, March 8, 2010

will not procrastinate...will not procrastinate...will not procrastinate...will not procrastinate...*rinse and repeat*

After a lot of thought, google searches and more thoughts at increasingly random times of the day, I've decide to test the effectiveness of different sunscreens in blocking UV rays, and whether how thick the sunscreen is affects its effectiveness. Also, I'll be testing different brands and kinds of sunscreen, eg Banana Boat kids sunscreen vs Quadblock sports sunscreen. Credit to all-science-fair-projects.com for directing me to the idea though. http://www.all-science-fair-projects.com/science_fair_projects/130/977/fabed7b425e19ff8fa97ad7bdde962f1.html

I can test the thickness of the sunscreen using a viscosity test we have used in science to tets the viscosity of different oils - by dropping a pea down a measured about of liquid, and timing the amount of time it takes for the pea to reach the bottom of the container.

The link to the Science Fair Projects website has the actual method for the testing of the effectiveness of the sunscreen against UV rays. It's a bit long so I'll probably simplify it if I can. I have also found an alternative method on http://ecohealth101.org/classroom/sunscreen.html but I highly doubt its result's accuracy, as the sunscreen's chemical make up really hasn't been taken into account at all and it would also be quite easy to make errors in the experiment. So I may use the first method or try and find one that's a bit simpler but actually works.

Friday, February 19, 2010