Science Experiment:how do hot air balloons work?

Watching a video about hot air balloons

Making our predictions: what will happen to our balloon when we put it in a pan of hot water?

When we put the bottle with the balloon on top into a pan of room temperature water, nothing really happened!

When we put the bottle into a pot of hot water, the balloon got bigger! We have learned that hot air rises and takes up more space, and we would need an enormous amount of hot air to make a hot air balloon go up in the air!