Curated OER
Balloon Expansion - Sick Science! #038
Have your class explore how a hot air balloon works. Through a simple demonstration, learners can see the process up close, and discuss why this occurs. They can then perform related experiments on their own.
Veritasium
Seeing the Invisible: Schlieren Imaging in Slow Motion
Heat rises, but what does that actually look like? The video shows many examples of air currents, such as a burning match and squeezing helium out of a balloon. It highlights common observations that are rarely seen such as gas vapors...