Why We Brush Our Teeth: The Egg and Soda Experiment

SciShow Kids

This educational video from SciShow Kids uses a hands-on experiment to visually demonstrate why brushing teeth is essential. By comparing eggshells to human teeth, the host explains how acidic foods and drinks like soda can erode enamel and cause staining. The video guides viewers through setting up a simple experiment at home using hard-boiled eggs and soda to simulate tooth decay. The content covers key scientific concepts including the properties of acids, the role of calcium in strengthening both eggshells and teeth, and the scientific method of hypothesis and observation. It connects chemistry to daily health habits, making the abstract concept of microscopic tooth damage concrete and understandable for young learners. Teachers can use this video to launch units on dental health, personal hygiene, or basic chemistry. It effectively motivates students to brush their teeth by showing the tangible 'gross' effects of neglect, while also serving as an excellent introduction to conducting scientific experiments with controls, variables, and observations.