Can Gravity Push Something Up?

This Can Gravity Push Something Up? lab resource also includes:

How does a hot air balloon fly? An experimental lesson has scholars build a balloon from a garbage bag and monitor the movement of air. As the temperature of the air in the balloon increases, gravity moves the denser cool air down, causing the balloon to rise.

3 Views 2 Downloads NGSS: Adaptable
Instructional Ideas

  • Build different sizes of balloons to observe the different rates of movement
Classroom Considerations

  • Best if done outdoors to allow room for the balloon to move
  • Requires an understanding of the movement of gas molecules
Pros

  • Uses easily obtainable materials
  • Includes step-by-step instructions for pupils to follow
Cons

  • None
NGSS