Things don’t always move the way you expect them to! The movement of air over the wings of a plans is what keeps them up in the air. Liquids and gases can flow and move so you can breathe and swim underwater (not at the same time, mind you) but solids stay put so you can pick up your phone or laptop to read this. The way that things move and flow past each other can be really interesting and really hard to predict. Let’s do some experiments to see what’s going on and learn some tricks to impress your friends.
Things normally either sink or they float, right? Well with this trick you can make something do both as if it can’t make up its mind! Bet your friends whether it will sink or float and then show off your trick.