Is it Waterproof?

We talked a lot about what the word waterproof means. Then we decided to do a simple experiment to test and see if some things were waterproof or not. First we had to guess what we thought was going to happen and we recorded our guesses. Then we did our experiment. Amongst the items we tested were a sock, a paper bag, a plastic bag and rubber gloves. We found out that the sock and the paper bag were not waterproof but the plastic bag and the rubber gloves were. We put some water on teacher's raincoat also and found that it was waterproof too, as are wellies and umbrellas.