1. Biology—enzymes and digestion, photosynthesis factors, respiration (aerobic/anaerobic), food chains/webs, reproduction methods, inherited vs environmental variation, genetic diagrams 2. Chemistry—acid reactions with metals, pH and indicators, neutralisation, displacement, combustion, corrosion prevention, identifying elements and compounds 3. Physics—forces (balanced/unbalanced), speed = distance/time, Hooke’s law, energy transfer (Sankey), pressure formula, reflection and refraction, lens ray diagrams 4. Earth Science—acid rain effects, lichens as pollution indicators, rock classification (igneous, sedimentary, metamorphic), fossil fuels vs renewable energy 5. Scientific skills—fair test setup, identifying variables, experimental design, data reliability, graph interpretation, anomaly detection