Mystery Orange: Peel On vs Off

Whole orange floats while peeled one sinks. Ask students to predict what will happen. Float whole orange, then peeled orange. Key idea: Air pockets in the peel lower average density. Ask: Did removing something make it heavier or denser? Safety and cleanup: No eating after water demo. https://www.google.com/search?q=%22Mystery+Orange%3A+Peel+On+vs+Off%22+science+demonstration+experiment