TED-Ed: Describing the invisible properties of gas - Brian Bennett

The video explains the involuntary nature of breathing and introduces gases, which are invisible but observable through their effects. It discusses how gases move in straight lines, occupy no volume individually, and conserve energy upon collision. The video also covers how gases do not attract each other and how their energy is proportional to temperature, with all gases having the same energy at the same temperature. This is a model based on scientific observations.

How do we observe gases if we cannot see them?

What does it mean that gases occupy no volume on their own?