1. Biology—digestive system, photosynthesis requirements, respiration, food chains, skeleton functions, inheritance, Punnett square, selective breeding, gametes, fertilisers and plant growth 2. Chemistry—metal properties, pH of substances, separation techniques, displacement reactions, reactions with acids, conservation of mass, reaction rates and surface area, hydrogen fuel pros/cons 3. Physics—forces (balanced, friction, gravity), weight vs. mass, orbits (geostationary, polar), Sankey diagrams, moment calculation, lever mechanics, Hooke’s law, energy transfer and efficiency 4. Earth Science—rock reaction to acid rain, organic vs non-organic farming, igneous rocks, environmental effects on traits 5. Scientific method—control variables, fair testing, dependent/independent variable, experimental design, anomaly identification, graph interpretation, repeatability, safety measures