1. Biology—digestion system roles, photosynthesis (factors, equation), respiration comparison, inherited/environmental variation, reproduction (sexual/asexual), food webs, DNA/genetic diagrams
2. Chemistry—acid reactions with metals, combustion, neutralisation, pH indicators, displacement, corrosion, naming salts, periodic table symbol identification
3. Physics—forces (balanced, resultant), motion and speed, Hooke’s law, energy transfer (Sankey), pressure calculations, refraction and reflection with ray diagrams
4. Earth Science—acid rain effects, bioindicators (lichens), rock cycle (igneous/sedimentary/metamorphic), fossil fuels and renewables, air pollution and environmental impact
5. Scientific method—independent/dependent/control variables, graph drawing, experiment accuracy, fair testing, anomaly recognition, reliability improvement