We had a great week! We are finishing up our study of the scientific methods, the physical properties of matter and states of matter. This lab was perfect. I had never done it before and was very surprised at the results! The lab took three days to complete and the experiment packet had pages to go with each step.
Here is one free resource from TPT that I found. There are many others available. I am used the lab with my fifth graders and found it age appropriate.