Wednesday, December 15, 2010
Soda, Tea and Your Teeth
Show your students a plain egg and the egg soaked in the Coke/tea - that's what the Coke/tea does to your teeth over time.
Then, use different brands of toothpaste and toothbrushes to try to clean the eggs.
FYI I used a brown egg, which makes the stain appear extra dark, and makes it harder to tell when you've brushed it off. For students, I would use white eggs, but for the purpose of taking pictures for this blog, I used what was on hand.