The document describes an experiment that was conducted to demonstrate that air takes up space. The experiment involved placing pieces of tissue paper and socks inside three glasses - one with no holes, one with a small hole, and one with many holes - and then inverting the glasses in a bowl of water. It was observed that the materials inside the glass with no holes remained dry, while the materials in the other glasses got wet, with the glass with many holes causing wetness the fastest. This supported the conclusion that air takes up space, since the holes allowed air to escape and be replaced with water.