Convection Spiral Spinner

Spiral slowly rotates. Ask students to predict what will happen. Suspend spiral over warm rising air. Key idea: Warm air rises and pushes on the angled paper. Ask: How can warm air make something turn? Safety and cleanup: No open flame; use safe heat source. https://www.google.com/search?q=%22Convection%20Spiral%20Spinner%22%20science%20demonstration%20experiment