Rubber Egg

Egg feels rubbery and can bounce slightly. Ask students to predict what will happen. Bounce prepared de-shelled egg gently from low height. Key idea: Acid dissolves calcium carbonate shell, leaving flexible membrane. Ask: Where did the hard shell go? Safety and cleanup: Teacher handles raw egg; wash hands. https://www.sciencelearningspace2.com/wp-content/uploads/2016/02/Unit18-rubber-eggs.pdf