The changes in matter chapter was cool. What I like about this chapter is that we did a tone of experiments like the one in the picture. The experiments were real fun. What I didn't like about this chapter is that we had to do many study guides and homework. Home work stinks. I also liked how we got to use the computers for the science test. My favorite experiment was the chemistry in a bag project. We watched the bags blow up and heat up. A few of them popped. The stuff turned purple. I learned that a  solution is two or more things mixted together until you can't see it. Another thing that I learned is about physical changes in matter and chemical changes too. What I want to know is that how did the chemistry in a bag heat up?