Summary Build circuits to show electricity generation by wind and solar. Science content Physics: Energy forms, Conservation of Energy (1, 3, 4, 5) Physics: Electricity, Electromagnetism (7) Activities in this lesson Wind turbine Solar panel Electric circuits with home-made wires and bulbs Motor free play Procedure We are surrounded by electrical devices and building components. We’ll make electricity in two ways: by turning a turbine, and by solar. Students (in pairs if possible) do the turbine and solar panel activities. Use batteries as a source of electricity, along with wires, lights and motors: Do the electric circuits and motor free play activities. Discussion on Energy Transformation: The battery is a store of chemical energy. When it is connected to a circuit chemical reaction happens in the battery, making electrical potential energy (the voltage of the battery). This difference between the ends of the battery shunts electrons along the circuit (electrical kinetic energy). The bulb converts the electrical energy to light energy. The motor converts electrical energy to motion energy. Discussion on sources of renewable electrical energy: Wind turbines account for about 4% of B.C.’s electricity generation capacity. Could also turn a turbine this shape with water for hydroelectric power. 87% of electricity in B.C. is produced from hydroelectric sources. Non-renewable: We also still burn natural gas to make electricity. The hot combustion products drive the turbine. Grades taught Gr 7
