Science: Air Pressure

I started off science by finishing a can of Coke. When I ask the kids, "What's inside?" The obvious response is, "Nothing."

To understand weather, the first concept we look at is just how important the nothing all around us is.

So today, we filled that can with 1/3 of water, meaning the remaining 2/3 was filled with air. Then the real fun began. We heated up the can and the water. As heat is added to the water, the liquid molecules gain energy and expand into a gas. Now, you guys may think of it as steam, which it is, but think of it as water gas or, vapor. It's still water, just in the gas form.

When the liquid heats up the gas pushes the air out of the can. So, when we flipped the can into cold water, the gas cools down.

Now, if you can explain why the can gets crushed then you officially understand air pressure!