AC9S9U05 Year 9 Science

This Content Descriptor from Year 9 Science provides the specific knowledge and skills students should learn. Use it to plan lessons, create learning sequences, and design assessments that align with the Australian Curriculum v9.

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

Elaborations

• 1 explaining that the law of conservation of energy explains that total energy is maintained in energy transfer and transformation in a system
• 2 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
• 3 using and critiquing representations such as Sankey diagrams to show energy inputs, changes and outputs in a system
• 4 investigating the efficiency of ground ovens used by First Nations Australians
• 5 comparing the efficiency of electricity generation from coal and other sources such as nuclear, hydroelectricity, gas, solar and wind
• 6 examining the meaning of energy star ratings given to appliances such as refrigerators and washing machines and criteria used to determine these ratings
• 7 examining how improving efficiency in energy transfer and transformations in sporting activities such as pole vaulting or archery improves athletic performance

Related Achievement Standards