These are the three states of matter. This is only part of the unit of chemistry we covered. We also learned what a mixture is, a pure substance, a homogeneous mixture, a heterogeneous mixture and what a solution is. It was a pretty easy unit for me just because it is very interesting to me. For example an example of a homogeneous mixture is kool aid. a heterogeneous mixture is for example trail mix. I hope you got a sense of what chemistry we were working on.