Balloon and Treacle

We investigate the effect that unbalanced charge has on polar molecules. We rub a balloon against hair to build up a negative charge and then hold this near a stream of water and then a stream of treacle. They both bend towards the balloon as the positively charged sides of the polar molecules in the liquids are attracted towards the negatively charged balloon. Physics - Electricity And Circuits - Learning Points. Electrostatic charge can exert a force over a distance. Polar molecules will be attracted to negatively charged objects due to their unbalanced charge distribution. A Twig Experiment Film. Let students experience real experiments in lab conditions anywhere, from setup, method all the way through to analysis and real-world application.