🧪 NCEA Level 1 Chemistry AS 92021

Achievement Standard: Demonstrate understanding of chemical reactions in context

Credits: 4     Version: 1

📊 Marking Criteria

Student demonstrates understanding of chemical reactions by:

• Identifying reactants and products in chemical equations

• Recognising different types of chemical reactions (synthesis, decomposition, combustion)

• Stating observations of chemical reactions in familiar contexts

• Using basic chemical vocabulary correctly

Student demonstrates clear understanding by:

• Explaining the process of chemical reactions using particle theory

• Describing how energy changes occur during reactions

• Linking observations to chemical processes in everyday contexts

• Writing balanced chemical equations for simple reactions

• Explaining factors that affect reaction rates

Student demonstrates comprehensive understanding by:

• Interpreting and evaluating chemical reactions in complex real-world contexts

• Predicting products and explaining reaction mechanisms

• Analysing the relationship between molecular structure and reactivity

• Justifying conclusions using scientific principles and evidence

• Making connections between different chemical concepts

📝 Additional Assessment Notes

• Environmental: Photosynthesis, acid rain, ozone depletion

• Industrial: Metal extraction, polymer production, fertiliser manufacture

• Biological: Digestion, respiration, fermentation

• Everyday: Cooking, cleaning, corrosion, batteries