How can you prove the helium takes up space?

You can demonstrate that helium takes up space by conducting a simple experiment. Fill a balloon with helium and then measure its dimensions and volume. When the balloon is inflated, it expands and occupies space, showing that the helium inside is pushing against the walls of the balloon. Additionally, you can compare the weight of the uninflated balloon to the weight of the inflated balloon, illustrating that the helium gas contributes to the overall volume and mass.