Why do some objects sink while others float? How does a boat with an anchor inside it stay afloat while the anchor by itself would quickly sink? Tim and Moby answer these questions and more in this BrainPOP movie about buoyancy! As they illustrate the concepts of negative, positive, and neutral buoyancy, you’ll learn the relationship between displacement, weight, and density, and even how fish can sleep while suspended in mid-ocean! With a raft of experiments demonstrating the how’s and why’s of buoyancy, this movie will give you the knowledge you’ll need to stay afloat in class!

Learn More:

What is buoyancy?

How do seaplanes float?

How do I know if I have positive or neutral buoyancy?