This morning we experimented with different materials to find which one was the best natural thermal insulator. We tested wood, stone, mud, leaves and a mixture of them all.
We predicted what what we thought would happen and most of us chose mud as the best thermal insulator, but.... WE WERE WRONG!
We found that leaves and grass were the best thermal insulators so this afternoon we've used our investigation to help us build warm, strong, waterproof shelters. Brian our guide tested them using the shake test and the water test