- Draw together the observations pupils have made about their circuits,
eg current is not used up around the circuit, the cell which provides energy to the circuit runs down, energy is transferred from the cell to components in the circuit. Ask pupils to try to explain the difference between current and energy. Introduce the idea of a model, to show something has to be imagined such as the inside of circuit components,
eg the water circuit can be used with a pump as cell, and water flow as electric current. Show how this demonstrates the concept of resistance of components in the circuit. Other models are possible,
eg a bicycle chain, trucks carrying loads, tight string.
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- distinguish between current and energy,
eg current just circulates back to the battery, energy
is used to light a bulb
- explain current in terms of a model
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