NCEA L1 ChemBio case studies
NCEA L1 ChemBio · Put your knowledge to work in context.
Chemistry and Biology is a subject on the New Zealand Curriculum, offered through NCEA at Level 1 only. It is a combined subject: it brings together the study of the properties of substances and how they change, and the scientific study of living things and the interconnectedness of life forms and the environment. It is intended for Year 11 learners working towards NCEA Level 1 who want to keep both science strands open rather than specialising early. Because it replaces the separate Level 1 Chemistry and Biology subjects, which NZQA states are no longer available at that level, candidates should check the Chemistry and Biology subject page and the Level 1 assessment matrix on NCEA.education for the standards that make up their programme. The NCEA L1 ChemBio case studies are 5 cases and about 1,426 words.
1The Swimming Pool Chlorine Reading
A school pool holds 50,000 L of water. The caretaker measures the free chlorine concentration as 0.4 mg/L, below the recommended minimum of 1.0 mg/L.
238 words, about 1 min2Neutralising an Acid Spill
A 2.0 L bottle of hydrochloric acid spills in a laboratory prep room. The label reads 0.50 mol/L.
299 words, about 1 min3Enzyme Activity in a Washing Powder Trial
A student tests a biological washing powder containing a protease. She sets up four trials, each with 10 mL of a 2% milk solution (protein) and a small square of photographic film coated in gelatin.
288 words, about 1 min4Choosing a Fertiliser for a Nitrogen-Deficient Crop
A grower has two paddocks. Paddock A has yellowing older leaves and stunted growth, suggesting nitrogen deficiency.
336 words, about 2 min5Interpreting a Predator-Prey Graph
A class monitors a closed terrarium containing grass, rabbits, and foxes over 12 months. The rabbit count rises from 20 in January to a peak of 120 in May, then falls to 30 by September before rising again.
265 words, about 1 min