1. River environments, hydrological cycle, weathering processes, water quality, flood prevention, mass movement, interlocking spurs, river regime 2. Coastal erosion, landforms, sand bars, salt marshes, mangroves, coral reef conflict, wave types, coastal flooding, coastal management 3. Hazardous environments, tropical cyclones, epicentre, tectonic damage factors, cyclone distribution, earthquake preparedness, hazard mapping, destructive plate margins 4. Fieldwork methodology, sediment variation, quantitative data, maps in enquiry, mean velocity, equipment usage, data collection, geographical enquiry process 5. Volcanic eruption impact analysis, risk zones, preparation strategies, long-term hazard effects, earthquake causes, coastal and river investigation techniques 6. Geography paper structure, question formats, analytical explanation, applied physical geography, real-world examples, data interpretation, Pearson Edexcel IGCSE