1. Biology—photosynthesis factors, enzyme digestion, respiration comparison, food chains/webs, variation types, sexual/asexual reproduction, DNA and inheritance, selection advantages
2. Chemistry—acid reactions, neutralisation, displacement, combustion, pH scale and indicators, corrosion, identifying compounds from symbols/formulae
3. Physics—speed, force diagrams, Hooke’s law, Sankey energy diagrams, pressure formula, reflection/refraction diagrams, lens ray tracing, gravitational effects
4. Earth Science—acid rain effects, rock types (igneous, sedimentary, metamorphic), lichens as bioindicators, air quality, renewable energy vs fossil fuels
5. Scientific method—variables identification, anomaly detection, improving reliability, graphing results, fair test design, control of experimental factors