Energy & Forces - Properties & uses of energy - Heat transfer - G25 - EF-E1.1

1	Use of heat sensitive paper to track heat flow along different metal rods.
2	Use a candle wax to support spent matches at different points along a metal rod, heated at one end.
3	Compare the feel of a metal/plastic spoon shortly after being placed in ice/ hot water.
4	Compare the feel of a metal/plastic spoon some time after being placed in rod in ice / hot water.
5	Shine light from a projector through a bunsen flame or through a water filled tank fitted with a 12V immersion heater to make convection currents visible on a screen.
6	Use a paper spiral to show convection currents in air.
7	Permanganate crystal in water experiment.

Energy & Forces - Properties & uses of energy - Heat transfer - G25
Development of Target EF-E1.1
EF-E1.1	Describe the differences between the flow of heat by conduction and convection
State that heat energy travels from hot objects to cold objects.
State that heat can travel through solids by conduction.
Describe conduction in a solid in terms of the vibration of the particles.
State that metals are good conductors of heat.
State that non-metals are poor conductors (insulators).
Describe experiment to show that some metals are better conductors than other metals.
Explain why conductors & insulators at the same temperature feel different to the touch.
State that in a fluid, (liquid or gas), heat travels mostly by convection.
State that in convection, the hot fluid rises.
Describe the path taken by fluids in a convection current.
Explain convection currents in terms of fluid density.