STRAND 3 Energy and change


In Grade 7 you learnt about simple circuits and circuit diagrams. In this strand you will build on your knowledge of circuits, as well as friction and static electricity. You will also learn about how to convert electricity into other types of energy such as heat and light. You will discover how light can change colours and investigate how to do this. You will turn a simple nail and battery into an electromagnet and a piece of tungsten wire into a heating element.


Static electricity • Friction and static electricity


Series and parallel circuits • Series circuits and parallel circuits


• Output devices in complex circuits


• History of electricity and careers in electricity


Energy and change


Energy transfer in electrical systems • Circuits and current electricity


• Components of a circuit


• Effects of an electric current


Visible light • Radiation of light • The visible spectrum • Opaque and transparent substances


• Absorption and reflection of light


• Seeing light • Refraction of light • Careers in optics, physics and fibre optics


Strand 3 Energy and change 103


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