Science News

We've been learning about solids, liquids and gases. The students enjoyed our activity today as we learned about gases. We wanted to prove that gas takes up space and has mass. We measured balloons without air. Then we blew up the balloons and measured again. When we used the balance scales and unifix cubes it didn't show any difference, so we measured again using beans. We know from an earlier experience that the beans weigh 1 gram. We measured the flat balloons and they weighed the same as 12 beans. Then we blew up the balloons and the balloons weighed the same as 14 beans. We learned the gas in the balloon made the balloon weigh just a little more - 2 grams.