1. Biology—photosynthesis process and limiting factors, respiration (aerobic/anaerobic), enzyme function, food chains and energy loss, inherited/environmental variation, reproduction types, genetic diagrams 2. Chemistry—acid-metal reactions, displacement, neutralisation, combustion, corrosion, pH indicators, naming compounds, formula identification 3. Physics—forces and motion, Hooke’s law, speed/time/distance, Sankey diagrams, pressure = force/area, light reflection and refraction, ray diagrams through lenses 4. Earth Science—acid rain impact, rock type identification, pollution indicators (lichens), renewable vs non-renewable resources, environmental change effects 5. Scientific method—control/independent/dependent variables, experimental accuracy, fair test principles, data reliability, graph analysis, improvement suggestions