Dry Paper Towel Underwater

The towel stays dry. Ask students to predict what will happen. Stuff towel in cup, invert cup straight down into water, then remove. Key idea: Trapped air fills the cup and keeps water out. Ask: What is inside the 'empty' cup? Safety and cleanup: Shallow water; towel spills only. https://www.cmste.uregina.ca/Quickstarts/pdf/paperdryunderwater.pdf