Peltier Plate: One Side Hot, One Cold
One side cools while the other warms.
Teaching & key ideas
What you do: Power module briefly and compare both sides.
What students see: One side cools while the other warms.
Why it works: Electric current transports heat across junctions in the semiconductor device.
Question to ask: Where is the heat going?
Lesson flow
Predict → demonstrate → observe → briefly explain → ask: Where is the heat going?