Coaching Centre
Chapter 3: Energy Notes
The forms of energy and how they transform, energy flow diagrams and efficiency, heat transfer by conduction, convection and radiation, electric circuits, generating and using electricity, and how Australia is changing the way it makes power.
Sections
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3A Forms of energy Mastered
What energy is, how it is measured in joules, the difference between kinetic and potential energy, the main forms of energy (gravitational, elastic and chemical potential, kinetic, thermal, light, sound, electrical and nuclear), and the law of conservation of energy.
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3B Energy transformations and flow diagrams Mastered
How energy is transferred and transformed, writing energy chains, drawing Sankey (energy flow) diagrams, useful and wasted energy, and measuring the energy in food with a simple calorimeter.
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3C Heat transfer Mastered
How heat moves by conduction, convection and radiation, conductors and insulators, why dark surfaces absorb more radiation, how a vacuum flask works, and how animals and buildings control heat transfer.
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3D Electric circuits Mastered
What makes a complete circuit, current, voltage and resistance, circuit symbols and diagrams, series and parallel circuits, measuring with ammeters and voltmeters, conductors and insulators, and electrical safety.
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3E Generating and using electricity Mastered
How generators turn movement into electricity, how power stations work, how the grid uses transformers to carry electricity to homes, batteries and direct current, and how lighting and electronics have changed.
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3F Energy efficiency Mastered
Calculating efficiency as a percentage, power in watts, measuring household energy use in kilowatt-hours, comparing the true cost of light bulbs, energy star ratings, and ways to save energy at home.
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3G Renewable energy and Australia's power Mastered
Renewable and non-renewable energy sources, the problems with fossil fuels, how solar panels and wind turbines work, how efficient they are, storing energy with batteries and pumped hydro, and how Australia's electricity supply is changing.
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3H Energy review Mastered
A summary of the whole Energy chapter, key words and formulas, and a mixed test covering forms of energy, transformations, Sankey diagrams, heat transfer, circuits, generating electricity, efficiency and renewable energy.