AC9S9U01
Official content description
compare the role of body systems in regulating and coordinating the body’s response to a stimulus, and describe the operation of a negative feedback mechanism
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What Year 9 Science students should achieve
Coverage is judged against the achievement standard — not by ticking every content description. These are the official Year 9 Science standard sentences this code builds towards:
- They describe how the processes of sexual and asexual reproduction enable survival of the species.
- They explain observable chemical processes in terms of changes in atomic structure, atomic rearrangement and mass.
- Students explain the role of publication and peer review in the development of scientific knowledge and explain the relationship between science, technologies and engineering.
- They analyse energy conservation in simple systems and apply wave and particle models to describe energy transfer.
- They explain how interactions within and between Earth’s spheres affect the carbon cycle.
- By the end of Year 9 students explain how body systems provide a coordinated response to stimuli.
The Science understanding progression either side of AC9S9U01
A class can only meet this descriptor if they were taught the one before it. If yours hasn't, that's where the lesson starts — not here.
Taught before · Year 8
- AC9S8U01recognise cells as the basic units of living things, compare plant and animal cells, and describe the functions of specialised cell structures and organelles
- AC9S8U02analyse the relationship between structure and function of cells, tissues and organs in a plant and an animal organ system and explain how these systems enable survival of the individual
- AC9S8U03investigate tectonic activity including the formation of geological features at divergent, convergent and transform plate boundaries and describe the scientific evidence for the theory of plate tectonics
Builds towards · Year 10
- AC9S10U01explain the role of meiosis and mitosis and the function of chromosomes, DNA and genes in heredity and predict patterns of Mendelian inheritance
- AC9S10U02use the theory of evolution by natural selection to explain past and present diversity and analyse the scientific evidence supporting the theory
- AC9S10U03describe how the big bang theory models the origin and evolution of the universe and analyse the supporting evidence for the theory
Other Year 9 Science understanding codes
- AC9S9U02describe the form and function of reproductive cells and organs in animals and plants, and analyse how the processes of sexual and asexual reproduction enable survival of the species
- AC9S9U03represent the carbon cycle and examine how key processes including combustion, photosynthesis and respiration rely on interactions between Earth’s spheres (the geosphere, biosphere, hydrosphere and atmosphere)
- AC9S9U04use wave and particle models to describe energy transfer through different mediums and examine the usefulness of each model for explaining phenomena
- AC9S9U05apply the law of conservation of energy to analyse system efficiency in terms of energy inputs, outputs, transfers and transformations
- AC9S9U06explain how the model of the atom changed following the discovery of electrons, protons and neutrons and describe how natural radioactive decay results in stable atoms
- AC9S9U07model the rearrangement of atoms in chemical reactions using a range of representations, including word and simple balanced chemical equations, and use these to demonstrate the law of conservation of mass
Content description and achievement standard © Australian Curriculum, Assessment and Reporting Authority (ACARA), Australian Curriculum Version 9, used under CC BY 4.0. TeachKoala is not affiliated with or endorsed by ACARA.