im doing science fair and i wanted to know how i would be able to test if a higher spf lotion works better then a lower spf sunscreen. but i dont know what to test it on other then myself...which would be pretty stupid..please help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
like a colored what? water bottle..and they put them out in the sun for a period of time and if the colored bottle changes color or looses color it means its been affected by sunlight more??
like a colored what? water bottle..and they put them out in the sun for a period of time and if the colored bottle changes color or looses color it means its been affected by sunlight more??