Compare the weight of objects using a scale. With your class, watch as two contestants measure the weight of different gases using balloons and a scale. Thenask you students to try their own luck by playing Helga's Game.
Assign directly to your students using the code or link above, without having them log in. Simply tell your students to go to
www.pbsstudents.org and enter the Assignment Code, or click on the Assignment URL to share the assignment as a link.