- Remind pupils of their experience of energy transfers and transformations in years 7 and 8 with demonstrations of 'useful changes',
eg working a model steam engine, a spring-driven clock, eating food. Help pupils associate the presence of energy with the different situations in the demonstrations,
eg steam-engine fuel, flame, hot water, movement, and to use the terms 'kinetic', 'potential', 'chemical energy', 'heat', 'light' and 'sound' as ways of describing energy in such situations.
- Ask pupils to explore a circus of toys and devices that work by transferring and/or transforming energy. Ask pupils to identify the source of energy and the use to which it is put. Include a range of electrical toys and devices,
eg
-
battery-operated and clockwork/spring-operated vehicles
-
yo-yo (if possible one that lights up at maximum speed)
-
battery-operated and manually operated fans
-
electromagnet for lifting
-
electric bell or buzzer
-
solar-powered calculator or motor
-
low-voltage heater that is set to get warm, not hot, to the touch
-
toys that feature light-emitting diodes (LEDs)
-
simple control circuit, eg one that sounds a buzzer when a light sensor is covered
|
|
- recognise that energy is routinely converted from one form to another in order to be useful
- categorise devices on the basis of type of energy input or output
- explain why electricity is used widely as a source of energy
- describe energy transfers in everyday changes
|
