AC9S9U05 Year 9 Science

Content descriptor apply the law of conservation of energy to analyse system efficiency in terms of energy inputs, outputs, transfers and transformations

Elaborations

• • Elaboration explaining that the law of conservation of energy explains that total energy is maintained in energy transfer and transformation in a system
• • Elaboration 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
• • Elaboration using and critiquing representations such as Sankey diagrams to show energy inputs, changes and outputs in a system
• • Elaboration investigating the efficiency of ground ovens used by First Nations Australians
• • Elaboration comparing the efficiency of electricity generation from coal and other sources such as nuclear, hydroelectricity, gas, solar and wind
• • Elaboration examining the meaning of energy star ratings given to appliances such as refrigerators and washing machines and criteria used to determine these ratings
• • Elaboration examining how improving efficiency in energy transfer and transformations in sporting activities such as pole vaulting or archery improves athletic performance