Building an Insulator

Jacob had to build an insulator for a school project. He had to construct it on his own, and use whatever materials he thought would keep an ice cube from melting. He put an ice cube in his insulator and one in a bowl to see which one would melt first. After 1 1/2 hours the cube was completely melted in the bowl, but still solid in his insulator. It was fun project to do!