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NSW Curriculum
NSW Education Standards Authority

7–10Science 7–10 Syllabus

Record of changes
Implementation from 2026
Expand for detailed implementation advice

Content

Stage 5

Reactions

Working scientifically

In this focus area, students develop skills in observation, as well as questioning and predicting, and planning investigations. Additional Working scientifically outcomes and skills may be integrated with this content.

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Law of conservation of mass
  • Explain the meaning of the law of conservation of mass

  • Conduct a practical investigation to demonstrate the law of conservation of mass in a chemical reaction

  • Investigate and explain how mass is conserved in closed systems

Chemical reactions
  • Use IUPAC naming conventions to construct the chemical formula for common ionic and covalent compounds

  • Represent chemical reactions, by predicting products and writing word and balanced chemical equations with states, as they are encountered

  • Model simple chemical reactions to show that atoms are rearranged and mass is conserved during a reaction

  • Determine the features of reactions by conducting synthesis, decomposition, displacement and neutralisation reactions

  • Identify pH as the measure of acidity and compare the pH of a range of common substances to the pH of pure water

  • Use pH indicators or meters to measure the pH change of neutralisation reactions

Rate of chemical reactions
  • Investigate and explain how concentration, surface area, temperature and catalysts affect the rate of reactions

  • Conduct a practical investigation to test a measurable hypothesis, with a cause-and-effect relationship, that predicts changes to the rate of a chemical reaction, and graph data that communicates the investigation findings in a scientific report

Nuclear reactions
  • Outline how the first elements were formed after the Big Bang

  • Describe the conditions that cause a nucleus to be unstable

  • Represent alpha and beta reactions as nuclear reactions

  • Identify that the half-life of a radioactive isotope is the time taken for half of the atoms in a sample to undergo radioactive decay

  • Evaluate the societal benefits and considerations of using radioisotopes in medicine, industry and environmental monitoring

  • Describe nuclear fission and nuclear fusion

  • Outline the impacts on the environment of nuclear reactions, including the raw materials used, the various stages of production and nuclear waste

Reactions in context
  • Investigate a chemical or nuclear reaction used in industry to produce an important product

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