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Description

When energy is released as heat, it always travels from hot to cold. Stella uses a special temperature-sensitive metal bar to show how heat energy is transferred through a metal as it is heated up. An animation is used to show the particles in the metal transferring some of their movement or energy to neighbouring particles.
This clip is from:
First broadcast:
18 May 2007

Classroom Ideas

Students could be given candle wax, drawing pins and two strips of different metals. Can they design a practical experiment to show which is the better conductor? To do this they can stick the drawing pins to the strips of metal at regular intervals using the wax and hold them in a Bunsen flame using a retort stand. The time taken for the pins to fall shows which metal is the better conductor.
If the class has already studied sound insulation and conduction, they could compare both types of energy transfer and explain them in relation to the kinetic model.