← Science – Year 9
Science understanding
Biological sciences
- AC9S9U01 – 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
- AC9S9U02 – describe 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
Earth and space sciences
- AC9S9U03 – represent 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)
Physical sciences
- AC9S9U04 – use wave and particle models to describe energy transfer through different mediums and examine the usefulness of each model for explaining phenomena
- AC9S9U05 – apply the law of conservation of energy to analyse system efficiency in terms of energy inputs, outputs, transfers and transformations
Chemical sciences
- AC9S9U06 – explain 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
- AC9S9U07 – model 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
Sample Questions — Science understanding