Your kids are already teens but that does not mean that they have outgrown getting bored on rainy days, and they can still have fun doing science experiments on rainy days. Even if your teen spends most of her indoor time playing video games, talking on the phone and surfing the internet, she could probably use a change of pace every now and again. Science projects are fun for people of all ages and you and your teen might even learn something.
It seems that every person in the United States has, at some point in his life, heard that if you leave a bone, tooth or nail in a jar of Coca Cola the soda will completely dissolve the organic material within a month. This claim is supposed to demonstrate just how bad drinking soda is for your body, but is it true? This is a great experiment for teens to do because it is fun and because a lot of teens are crazy about soda.
Get together some mason jars, a few cans of soda and some things to dissolve. The rumor is that Coke can dissolve a bone, tooth or nail. Try to collect some finger nails, chicken bones and a baby tooth if you can find one. Then, just for the sake of science, try the experiment with a variety of sodas. Get Coke, Diet Coke, Pepsi and Mountain Dew. Next get some mason jars to do your experiment in.
Label the jars and fill them with the different types of soda. Photograph the finger nails, chicken bones and teeth before you start the experiment so that you can remember what these things looked like before they were submerged. Put one finger nail, chicken bone or tooth in every jar and note which organic thing went in each jar. Keep an eye on your jars for a month, then remove the organic materials left over and compare them to what you started with.