Today we went to the Ottawa Science And Technology Museum (O.S.T.M) and it was all really good. My favorite part was a Cryogenics demo, and if you don’t know what it is, it is freezing things with liquid nitrogen. One of the things they did was put a balloon filled with air in the liquid nitrogen and when they pulled it out the the air in the balloon compressed and when it warmed up the air came back. The next thing the guy did was he put a little bit of boiling water in a cup and then dumped the water in and…. well…. look.