One of the lines of inquiry for Grade 4 at present looks at the properties of matter. On Monday morning the students investigated water in its three forms. They started with an ice cube, then watched water boil to become steam. The challenge was as follows: make an ice cube last as long as you can or make an ice cube melt as fast as you can. At all times, the ice cube needed to be in your hands. It was a great challenge. One of our ice cubes lasted for more than 10 minutes!