Chemistry of Fudge or other candies. Hey, what the heck, this is a great way to learn about saturated and supersaturated solutions and the effects of temp. on saturation. I usually do this with my high school chemistry students. Can be a bit pricey, but kids usually have no problem chipping in for fudge!
The atomic theory of matter tells us that a gas is made up of tiny particles called atoms (or molecules, which are combinations of atoms), which are constantly in motion, smashing into each other and the walls of whatever container they might be in.