Year 7 Science: Every Australian Curriculum Code, Explained

Year 7 Science in the Australian Curriculum Version 9 is 18 content descriptions, AC9S7H01 through AC9S7U06. Before you plan anything, there is one fact worth knowing: twelve of those eighteen are repeated word for word in Year 8.

The four Science as a Human Endeavour descriptors and all eight Science Inquiry descriptors are textually identical at Year 7 and Year 8. Only the six Science Understanding descriptors change. That single structural fact should shape the programme, the assessment and, if you teach a composite class, the timetable.

This is a working guide to all 18 codes: what actually changes from Year 6, where the progression has to come from when the wording gives you none, the three hard descriptors, a term-by-term order, and six checks.

What changes this year

The Science Inquiry strand grows from six descriptors to eight, and the two new ones are the interesting part. AC9S7I06 asks students to analyse methods, conclusions and claims for assumptions, possible sources of error, conflicting evidence and unanswered questions. AC9S7I07 asks them to construct evidence-based arguments to support conclusions or evaluate claims, and to consider ethical issues and cultural protocols when using secondary data. Year 6 asked students to compare their findings with others’ and recognise possible error. Year 7 asks them to interrogate somebody else’s work and then argue.

The vocabulary shifts with it. Year 6 asked for repeatable investigations; Year 7 asks for reproducible ones, which is a different and stronger idea: repeatable means you can get the same result again, reproducible means somebody else can, from your description alone. Year 6 asked for reasoned predictions; Year 7 adds hypotheses. And Year 6 asked students to record data with reasonable precision, where Year 7 drops the word reasonable.

In Science Understanding, the six descriptors are genuinely new content and two of them are the year’s conceptual load. AC9S7U05 introduces particle theory, which is the first model in the curriculum that explains everyday properties by reference to things nobody can see, and AC9S7U04 introduces balanced and unbalanced forces, where a student’s everyday intuitions about motion actively contradict the physics. Alongside them, classification and dichotomous keys (AC9S7U01), food webs and ecosystems (AC9S7U02), Earth-sun-moon cycles including eclipses, seasons and tides (AC9S7U03), and separating mixtures (AC9S7U06).

The twelve descriptors that do not change

This is unusual enough to be worth stating precisely. AC9S7H01 to AC9S7H04 and AC9S7I01 to AC9S7I08 are word-for-word identical to AC9S8H01 to AC9S8H04 and AC9S8I01 to AC9S8I08. Not similar, not aligned: the same sentences. The same holds between Year 9 and Year 10, where twelve of the nineteen descriptors repeat verbatim.

Three practical consequences follow, and all three are worth acting on.

• A composite Year 7 and 8 class needs no differentiation at all in two of the three strands. Two-thirds of the descriptors are shared, so only the Understanding content has to be split. That is a genuinely useful fact for small schools, multi-age settings and homeschools with siblings, and it is invisible unless you compare the two years side by side.
• The progression in H and I has to come from you. The curriculum specifies no growth across the two years, so if Year 8 investigations look like Year 7 investigations, the documents will not tell you anything is wrong. Decide the progression yourself and write it down: Year 7 might identify variables in a supplied method, Year 8 might design the method; Year 7 might spot one source of error, Year 8 might rank them by likely impact.
• Assessment against these codes cannot distinguish the years. A portfolio tagged AC9S7I02 and one tagged AC9S8I02 make identical claims. Record what the student actually did, not just the code, or two years of evidence become indistinguishable.

The year at a glance

Read the proportions rather than the count. Twelve of the eighteen descriptors are about how science is done and what it is for; six are about what is known. Year 7 Science is a methodology course with six topics attached, and a programme that treats the practical work as a delivery mechanism for the content has the emphasis backwards.

Reading the codes

The pattern is AC9S + year + strand + number, so AC9S7U04 is Year 7 Science Understanding, position 4. Strand letters are H for Science as a Human Endeavour, I for Science Inquiry and U for Science Understanding. Note that Science does not sub-divide Understanding into the familiar Biology, Chemistry, Physics and Earth Science labels in the code itself: the six U descriptors cover all four disciplines and you have to read them to know which is which.

Strand by strand

Science Understanding (AC9S7U01 to AC9S7U06)

AC9S7U01 investigates the role of classification in ordering the diversity of life and asks students to use and develop classification tools including dichotomous keys. Building a key is the assessable half and the one usually skipped, and it is much more demanding than using one, because the student has to choose characteristics that split a group cleanly.

AC9S7U02 uses models, including food webs, to represent matter and energy flow and to predict the impact of changing abiotic and biotic factors on populations. The word predict is doing the work: drawing the web is Year 6 territory, and using it to reason forward about a disturbance is the Year 7 step. AC9S7U03 models cyclic changes in the relative positions of Earth, sun and moon to explain eclipses, seasons and tides, which is the successor to Year 6’s work on Earth’s tilt and rotation.

AC9S7U04 investigates and represents balanced and unbalanced forces, including gravity, and relates changes in motion to mass and to the magnitude and direction of forces. AC9S7U05 uses particle theory to describe the arrangement of particles, their motion and the attraction between them, and relates that to a substance’s properties. AC9S7U06 applies the particle model to the difference between pure substances and mixtures, and to separating them. Teach U05 before U06, since the second is the first applied.

Science Inquiry (AC9S7I01 to AC9S7I08)

The eight run in a sensible order and largely describe the arc of an investigation. AC9S7I01 develops investigable questions, reasoned predictions and hypotheses. AC9S7I02 plans and conducts reproducible investigations, identifying variables and assumptions and, as appropriate, managing risks, considering ethical issues and recognising key considerations regarding heritage sites and artefacts on Country and Place. AC9S7I03 selects and uses equipment to generate and record data with precision.

AC9S7I04 selects and constructs representations including tables, graphs, models and mathematical relationships, which is new against Year 6 and is where Science starts depending on the algebra Year 7 Maths is teaching in parallel. AC9S7I05 analyses data to describe patterns, trends and relationships and to identify anomalies.

AC9S7I06 and AC9S7I07 are the two new descriptors and the heart of the strand. The first analyses methods, conclusions and claims for assumptions, sources of error, conflicting evidence and unanswered questions; the second constructs evidence-based arguments and considers ethical issues and cultural protocols when using or citing secondary data. Together they turn Science from something students do into something students evaluate. AC9S7I08 communicates ideas, findings and arguments for specific purposes and audiences.

Science as a Human Endeavour (AC9S7H01 to AC9S7H04)

Four descriptors, and the strand most often reduced to a poster task at the end of term. AC9S7H01 explains how new evidence or different perspectives change scientific knowledge, which is the descriptor that makes the difference between science-as-a-list-of-facts and science-as-a-process. AC9S7H02 investigates how cultural perspectives and world views influence the development of scientific knowledge.

AC9S7H03 examines how proposed scientific responses to contemporary issues may impact society, exploring ethical, environmental, social and economic considerations. AC9S7H04 explores the role of science communication in informing individual viewpoints and community policies and regulations. Those two pair naturally with AC9S7I07, since arguing from evidence and understanding how evidence travels in public are the same skill pointed at different audiences. Teach the strand inside the content units rather than as a unit of its own, because a discussion about scientific uncertainty is far more useful attached to a topic students have just investigated.

The three hardest descriptors this year

AC9S7U04: things do not need a force to keep moving

The misconception: that motion requires a continuing force, so anything moving must have something pushing it and anything that stops has run out of push. This is the most robust misconception in school science, it is what almost everybody believes before instruction, and it survives being told otherwise.

What you will see: a ball thrown straight up, at the top of its flight, drawn with an upward arrow, because it was going up so something must still be pushing it up. A puck sliding on ice drawn with a forward arrow. And, more revealingly, a student who can recite that an object continues at constant velocity unless acted on by a force, and who then draws the upward arrow anyway when the question is a picture rather than a sentence.

The fix: do not start from the rule. Start by reducing friction until the intuition breaks: a trolley on a long smooth track, dry ice pucks, an air track if you have one. A student who watches something keep going without a push has evidence against their model, which is what the model needs. Then make force diagrams the routine output rather than an occasional exercise, with one rule enforced absolutely: every arrow needs a named source, and “the force of the throw” is not a source because the hand is no longer touching it. That single requirement kills the upward-arrow error, because the student cannot name what is producing it. Keep the direction-of-motion and direction-of-force questions deliberately separate, since AC9S7U04 asks about both and students merge them.

AC9S7U05: the particles are not the substance in miniature

The misconception: that particles carry the properties of the material they make up, so the particles in copper are orange and shiny, the particles in ice are cold, and the particles in a gas expand when it is heated. It follows naturally from the way the model is usually introduced and it blocks everything that comes after.

What you will see: asked what happens to the particles when a metal bar is heated and expands, a student says the particles get bigger. Asked to draw the particles in a cold liquid and a hot one, they draw smaller circles for the cold. Asked what is between the particles in a gas, they answer air, which is the most diagnostic wrong answer in the topic because it means the model has not replaced the everyday picture at all.

The fix: make the between-the-particles question the centre of the teaching, not a detail. Ask it early, accept the wrong answer without correcting it, and then build the case: if there were air between the particles of air, what would be between those particles? Students can feel the regress and it does more than an assertion. Then be relentlessly consistent in every drawing: particles are the same size and the same colour in every state and at every temperature, and only spacing and motion change. Ban shrinking circles outright. Finally, connect it to something visible immediately, which is where AC9S7U06 comes in: separating a mixture works because the particles of the components differ, so the model earns its keep the same fortnight it is introduced rather than remaining an abstraction.

AC9S7I06: analysing a method is not judging the result

The misconception: that evaluating an investigation means saying whether the answer was right, so a method that produced the expected result was a good method. This descriptor is new in Year 7 and there is no Year 6 ancestor to have corrected it.

What you will see: an evaluation that reads “the experiment worked because we got the right answer”. Or the error-list ritual: three generic sources of error (human error, equipment not accurate, should have done more trials) copied into every report regardless of what the investigation actually was. The tell is that the list would be equally true of a completely different experiment, which means it is not analysis of this method at all.

The fix: give students methods to analyse that are not their own, and build in the flaws deliberately. A written method with an uncontrolled variable, a conclusion that overreaches its data, a graph with a truncated axis: students find these much more readily in somebody else’s work, and the descriptor explicitly covers analysing claims rather than only their own investigations. Then ban the three generic errors by name and require every stated source of error to be accompanied by its direction: would it make the result too high or too low? That question is unanswerable for “human error” and answerable for a real one, so it filters automatically. Pair this with AC9S7I07, because identifying a weakness and constructing an argument that survives one are the same skill, and pair both with AC9S7H01, where changing evidence changing conclusions is the whole point.

What students need to arrive with

Year 7 leans on four Year 6 codes. AC9S6I02 (planning repeatable investigations with fair-test variables) is the prerequisite for AC9S7I02, which raises repeatable to reproducible and adds assumptions and ethics. AC9S6I04 (constructing tables, graphs and models) is the prerequisite for AC9S7I04, which adds mathematical relationships. AC9S6I05 (comparing findings with others and recognising possible error) is the prerequisite for AC9S7I06, the new analysis descriptor. And AC9S6U01 (physical conditions of a habitat affecting growth and survival) is the prerequisite for AC9S7U02, since a food web is that idea with the interactions drawn in.

Two Year 6 topics are worth checking for a different reason: they are assumed and not revisited. AC9S6U03 covers electrical circuits, which does not reappear in Year 7 or Year 8 nationally at all, and AC9S6U02 covers Earth’s tilt and rotation, which AC9S7U03 builds straight on without recap. If either was thin, address it before the relevant unit rather than during it. Our guide to Year 6 Science and its 12 codes covers what should have been established, and using a student’s interests as the way into curriculum content covers wrapping these topics around something a Year 7 student already cares about.

What this year sets up

• AC9S7H01 to AC9S7H04 and AC9S7I01 to AC9S7I08 become AC9S8H01 to AC9S8H04 and AC9S8I01 to AC9S8I08, word for word. The progression across those two years is entirely a matter of your expectations, because the curriculum specifies none.
• AC9S7U05 and AC9S7U06 (particle theory, pure substances and mixtures) become AC9S8U06, classifying matter as elements, compounds or mixtures with symbols and formulas, and AC9S8U07, comparing physical and chemical changes. The particle model is the foundation of all Year 8 chemistry.
• AC9S7U01 (classification) becomes AC9S8U01 and AC9S8U02, cells as the basic units of living things and the relationship between structure and function in organ systems. Classification is the habit of mind that cell biology assumes.
• AC9S7U04 (balanced and unbalanced forces) becomes AC9S8U05, classifying energy as kinetic or potential and investigating energy transfer and transformation.
• AC9S7U03 (Earth-sun-moon cycles) hands over to AC9S8U03 and AC9S8U04, plate tectonics and the rock cycle, so Earth and Space at Year 8 is geology rather than astronomy.
• AC9S7U02 (food webs and ecosystems) has no direct Year 8 successor, which is worth knowing: ecology is a Year 7 topic nationally and does not return until later secondary.

Victorian families following VC2 should note that Victoria bands Years 7 and 8 into a single level with 29 descriptors, which is arguably the more honest structure given how much the national Year 7 and Year 8 share, and it carries four Understanding topics the national curriculum does not have at this band, see Years 7 and 8 Science under the Victorian Curriculum. NSW families should note that Science is written as Stage 4 across Years 7 and 8, see how the NSW syllabuses are structured. Our guide to which curriculum your state uses is worth a minute if you are unsure which applies.

A term-by-term order

Because the H and I strands run all year rather than sitting in a unit, what follows sequences the six Understanding descriptors and names which inquiry work each unit is best suited to carrying.

1. Term 1: laboratory practice and classification. AC9S7U01 classification and dichotomous keys, with students building a key rather than only using one. This is the natural home for establishing AC9S7I01 to AC9S7I03, since a classification investigation is low-risk, quick to repeat and produces clean data. Introduce AC9S7H01 here, using a real case where classification changed as evidence changed.
2. Term 2: particles, and the model that explains everything else. AC9S7U05 particle theory, then AC9S7U06 pure substances, mixtures and separation, in that order. Separation techniques give repeated practice at AC9S7I03 and AC9S7I05 with visible results, and the unit is where AC9S7I04 mathematical relationships first pays off. Particle theory belongs early in the year because Year 8 chemistry is built on it entirely.
3. Term 3: forces and motion. AC9S7U04, with the friction-reduction work first and the force diagrams as the standing output. This is the best unit in the year for AC9S7I06, because the gap between prediction and result is large, honest and productive, and students have a real reason to interrogate a method. Bring in AC9S7I07 here too: arguing from a motion result against a strong intuition is exactly what an evidence-based argument is for.
4. Term 4: systems, at two scales. AC9S7U02 food webs and ecosystems, then AC9S7U03 Earth, sun and moon cycles. Both are modelling topics where the investigation is a simulation rather than an experiment, which makes them the right place for AC9S7H02, AC9S7H03 and AC9S7H04, since ecosystem management and climate are where science, ethics and public communication meet. Finish with a full investigation carrying AC9S7I01 through AC9S7I08.

Two orderings matter more than the rest. AC9S7U05 comes before AC9S7U06, because separation is the particle model applied and makes no sense before it. And AC9S7U04 benefits from coming after the particle work rather than opening the year, because by Term 3 students have had a term of practice at trusting evidence over intuition, which is exactly what forces will ask of them.

Assessment checkpoints

• Understanding: draw a ball thrown straight upward, paused at the top of its flight, and ask for the forces on it. One downward arrow labelled gravity confirms AC9S7U04. An upward arrow means motion is still being read as requiring a force, so return to the named-source rule for every arrow.
• Understanding: ask what is between the particles in a gas. “Nothing” confirms AC9S7U05. “Air” means the particle model has not replaced the everyday picture, which will block all of Year 8 chemistry.
• Understanding: ask what happens to the particles in a metal bar when it is heated and expands. They move faster and further apart confirms AC9S7U05. “They get bigger” is the particles-carry-the-properties error and needs the same-size-always rule enforced in every drawing.
• Inquiry: give a written method with one uncontrolled variable and ask what is wrong with it. Naming the variable confirms AC9S7I06. “Human error” or “more trials” means the generic error list is being recited, so require every stated error to come with its direction, too high or too low.
• Inquiry: ask them to build a dichotomous key for six objects on the desk. A key that splits the group cleanly at each step confirms AC9S7U01 and AC9S7I04. A key using characteristics that are matters of opinion, such as pretty or big, means the choose-a-splitting characteristic step has not been taught.
• Human Endeavour: ask for an example of a scientific idea that changed, and what changed it. Any real case with the evidence named confirms AC9S7H01. “Scientists were wrong before” means the strand is being treated as history rather than as how the method works, and AC9S7I06 will land poorly as a result.

Recording the alignment

Whether you are programming for a class or building evidence for a homeschool registration review, record the code on the activity as you go, and in Year 7 Science record what the student actually did alongside it, in more detail than you would in other subjects. The reason is the repetition: because AC9S7I02 and AC9S8I02 are the same sentence, a portfolio tagged only with codes makes identical claims about two years of work, and neither you nor a reviewer can tell them apart afterwards.

“AC9S7I02, planned the separation of a sand, salt and iron mixture including choosing which variable to control, 12 May” distinguishes itself from the Year 8 version of the same code. Keep the investigation write-ups rather than only the results, since AC9S7I06 and AC9S7I07 are evidenced by the analysis and the argument rather than by the experiment. Our guide to state-by-state registration requirements covers what reviewers ask for, and using interests as the gateway to curriculum content covers building investigations around something a Year 7 student is already curious about.

Sprout Lessons builds a full interactive lesson from any of these 18 codes, pitched at Year 7 and built around whatever your student is into, with self-checking practice that hints rather than just marking wrong, and the exact AC9 code recorded in the lesson footer. It earns its keep most on AC9S7U04 and AC9S7U05, where the misconceptions are strong enough that students need many more worked variations than one lesson carries, and where a hint at the moment of the error beats a correction a week later. Try it free and generate a Year 7 Science lesson in about a minute.

Australian Curriculum content descriptions are © ACARA and licensed under CC BY 4.0. Quoted here unmodified. ACARA does not endorse this product. Always verify against the current content descriptions and achievement standards at australiancurriculum.edu.au.

FAQ