Sam's Science Chat

This week in science class we talked about physical changes and chemical changes. One of the chemical changes was we put this alcohol on the desk and lit the desk on fire, the change was liquid to flame, heat, and light. We did this experiment three times the first time we only put a little bit on the desk, the second time we put some more, and the third time we put it all over the desk. The next day we had an assembly, it was the OMSI ( Oregon Museum of Science Industries) one of the things they did was show us what happened to the Hindenburg and he made "elephant toothpaste". On friday we saw a video of this guy with a big tub of murcury and he was talking about how dense it was so he showed us by dropping a cannonball in it to show that it floats.http://www.youtube.com/watch?v=Rm5D47nG9k4