What students learn in AC9S9U07
This unit helps students build a clear, usable understanding of Model the rearrangement of atoms in chemical reactions using a.... The goal is not to memorise one answer pattern. Students should be able to explain the idea, recognise it in a new example and apply it in a short practice or worksheet task.
- Start with the main idea: 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.
- Use concrete examples, pictures, oral explanation and short written responses before moving to independent practice.
- identifying reactants and products in chemical reactions using models and representations to show the rearrangement of atoms in chemical reactions
- Finish with mixed questions so students must choose the correct strategy rather than copy the last example.
Curriculum coverage and elaborations
The content description and elaborations below show the curriculum ideas taught in this unit. Items marked as teaching context support lesson planning but may not appear in the initial eight-question activity.
- Content description: 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
- E1: identifying reactants and products in chemical reactions
- E2: using models and representations to show the rearrangement of atoms in chemical reactions
- E3: investigating chemical reactions in closed and open systems and relating data obtained to the law of conservation of mass
- E4: writing symbolic equations that are easy to balance and explaining, using the law of conservation of mass, and atoms, the rationale for balancing chemical equations
- E5: investigating why most elements are not found in their elemental state and processes which are used to obtain the element
- E6: predicting how ideas of green chemistry such as minimising the amount of unusable waste products, energy use and using more environmentally friendly chemical processes will affect the environment
How to use this unit
Read the topic guide, use the teacher slide for instruction, then complete the Worksheet, Practice and Test. These three activities use the same eight-question unit bank.
Teacher resource
AC9S9U07 teacher slide
Use this one-page PDF to introduce the key idea, vocabulary and teaching sequence before students begin the activities.
Open teacher slide (PDF)Common mistakes to watch for
- Describing what is seen without connecting it to a question, pattern or prediction.
- Using everyday words only and missing simple scientific vocabulary.
- Changing more than one thing in an investigation, which makes the comparison unfair.
International curriculum mapping
This table gives closest-topic mapping for search and planning. The Australian Curriculum code is exact; overseas entries are broad equivalents because each jurisdiction structures outcomes differently.
| Region | Curriculum | Closest mapping |
|---|---|---|
| Australia | Australian Curriculum v9.0 | 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 |
| Victoria | Victorian Curriculum F-10 | Year 9 Science: closest match in Chemical sciences. Use this page as a VIC-aligned practice and worksheet reference. |
| NSW | NSW Curriculum | Stage 5 Science: closest content focus for Model the rearrangement of atoms in chemical reactions using a... and related outcomes. |
| United States | Common Core / NGSS | Grade 9 NGSS science closest topic match for Model the rearrangement of atoms in chemical reactions using a.... |
| England / UK | National Curriculum | Key Stage 3 / Year 9: closest programme-of-study match for Model the rearrangement of atoms in chemical reactions using a.... |
| Canada | Provincial and territory curricula | Grade 9 closest topic match. Canada varies by province, so use this as a broad Ontario/BC-style learning outcome reference. |
| New Zealand | New Zealand Curriculum | Level 5 Science: closest achievement-objective topic for Model the rearrangement of atoms in chemical reactions using a.... |
| India | NCERT / CBSE | Class 9 closest NCERT/CBSE topic match for Model the rearrangement of atoms in chemical reactions using a.... |