Heat Conduction Demonstrator for Middle School Physics This tabletop demonstrator clearly shows how different solid materials conduct heat. A central heat storage block is heated, and multiple heat conduction rods of identical thickness and length radiate outward. Small concave spots on the rod ends hold a thin layer of butter. Wooden indicator sticks attached to those spots tip or fall as the butter melts, giving a clear, visual record of which materials conduct heat faster. Key benefits Demonstrates the concept of thermal conductivity in a direct, visible way, supporting classroom explanations and student understanding. Simple setup and clear results make it suitable for teacherled demonstrations, lab exercises, and student investigations. All rods share the same dimensions so differences in timing reflect material properties rather than geometry. Main features Function: visual demonstration of heat conduction and comparative thermal conductivity among solid materials. Design: radial arrangement of equallength, equalthickness conduction rods connected to a central heat storage block. Indicator system: concave spots on each rod hold a small amount of butter and a wooden stick that responds when heat reaches the rod end. Compatibility: intended for middle school physics classes, science labs, demonstrations, and handson learning activities. Performance: shows relative heat transfer rates clearly by the and timing of indicator movement. Typical use scenarios Classroom demonstration: Teacher heats the central block while students observe the sequence in which sticks tip, illustrating differences in conductivity. Lab exercise: Student groups repeat the experiment to record timings and compare materials under identical geometric conditions. Science fair or outreach: Portable, easytorun demonstration for explaining conduction to an audience. Basic operation 1. Place the demonstrator balanced on a desktop. 2. Apply a small amount of butter into each concave spot on the rod ends. 3. Insert a match or other controlled heat source into the heat storage block and begin the experiment. 4. Observe the and timing of the wooden sticks tipping or falling to compare conductivity. Care and storage Allow the rods to cool completely after each experiment. Wipe the rod ends clean, apply a light oil coating, and store the instrument in a secure place. Handle with care to avoid dropping or striking the rods. This demonstrator provides a straightforward, repeatable way to teach and explore thermal conduction using consistent rod geometry and a clear visual indicator system.