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Science / Year 9 / Science understanding / Physical sciences
Curriculum content descriptions
apply the law of conservation of energy to analyse system efficiency in terms of energy inputs, outputs, transfers and transformations (AC9S9U05)
Elaborations
- explaining that the law of conservation of energy explains that total energy is maintained in energy transfer and transformation in a system
- explaining efficiency and recognising that in energy transfer and transformation a variety of processes can occur, so that the amount of usable energy is reduced and the system is not 100% efficient
- using and critiquing representations such as Sankey diagrams to show energy inputs, changes and outputs in a system
- investigating the efficiency of ground ovens used by First Nations Australians
- comparing the efficiency of electricity generation from coal and other sources such as nuclear, hydroelectricity, gas, solar and wind
- examining the meaning of energy star ratings given to appliances such as refrigerators and washing machines and criteria used to determine these ratings
- examining how improving efficiency in energy transfer and transformations in sporting activities such as pole vaulting or archery improves athletic performance
General capabilities
ScOT terms
Energy conversion