NCEA L1 ChemBio study guide
NCEA L1 ChemBio · Work through your exam, one topic at a time.
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. Topics on this exam: Chemistry and Biology. The NCEA L1 ChemBio study guide has 2 sections and about 621 words.
01Chemistry: Particles, Reactions and Quantitative Thinking
Chemistry at this level rests on the particle model: matter is made of atoms, atoms combine into molecules and ions, and observable properties follow from how particles are arranged and how strongly they attract each other. You should be able to name the three states of matter and explain changes of state in terms of energy and particle motion, distinguish elements, compounds and mixtures, and interpret a chemical formula (subscripts count atoms within a unit; coefficients in front of a formula count whole units). Chemical reactions are described by word and symbol equations, which must be balanced because atoms are conserved. Recognise common reaction types: combination, decomposition, combustion, and simple acid–base neutralisation.
301 words, about 2 min02Biology: Cells, Exchange and Inheritance Basics
Biology questions reward clear structure–function reasoning. Know that cells are the basic unit of life; plant cells have a cell wall, chloroplasts and a large permanent vacuole, while animal cells do not. Organelles have jobs: nucleus controls activity and holds DNA, mitochondria release energy in respiration, chloroplasts carry out photosynthesis, the cell membrane controls what enters and leaves. Multicellular organisms need exchange surfaces because surface area to volume ratio falls as size increases.
320 words, about 2 min