Ice Melts Faster on Metal Than Wood

1. Ice Melts Faster on Metal Than Wood Materials: Metal block/spoon; wood/plastic block; equal ice cubes What you do: Place equal ice cubes on both materials. What students see: Ice often melts faster on the metal even when both started at room temperature. Question: Which material feels colder, and which actually melts the ice faster? 2. Convection Spiral Spinner Materials: Paper spiral; stand; warm lamp or safe warm-air source What you do: Suspend spiral over warm rising air. What students see: Spiral slowly rotates. Question: How can warm air make something turn? 3. Wax Dots Show Heat Conduction Materials: Metal strip/spoon; tiny wax dots; warm-water end What you do: Warm one end and watch wax dots soften in sequence. What students see: Wax nearest the warm end melts first, then farther dots. Question: How does heat travel through a solid?

Predict → observe three demonstrations → compare what changed → choose independent activity station → cleanup/share. Guiding questions: Question: Which material feels colder, and which actually melts the ice faster? Question: How can warm air make something turn? Question: How does heat travel through a solid?