Lesson Summary:
The lesson introduces the children to simple electrical circuits. The discussion is designed to be used by the teacher and the children should be able to handle the different components as they are introduced to them. Activity A requires the children to draw a simple series circuit and Activity B gives them the opportunity to experiment with the components and build their own circuit. Activity C tests their theoretical knowledge of electrical circuits.
Objectives:
- The children will understand and be able to explain the movement of an electrical current in a circuit.
- The children will be able to build a simple electric circuit.
- The children will be able to draw a diagram of a simple electric circuit.
PLEASE NOTE: The children should be aware that while it is safe to use a battery as a power source, the mains output is dangerous.
Subject Area:
Science
Lesson Excerpt:
How many things can you think of which run on electricity? At home we have stoves and ‘fridges, heaters and fans, radios, TV’s and DVD players, and, of course, light bulbs. Have you ever wondered how they all work?
All electrical appliances operate on an electrical circuit. An electrical circuit is a loop which has a source of energy, or a power source, such as a battery or a mains supply, a conductor, such as wire, which conducts or transfers the energy to the device which is going to use it (called a load) and a switch to complete, or close, the circuit. So, for instance, when we switch on a torch, the switch completes the circuit and the electricity moves from the live connection of the power source (the battery) though the wires to the light bulb which converts it into light and then back to the negative connection of the power source, completing the loop. This movement of the electricity is called the current.
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