This combined science exam paper evaluates concepts across physics, biology, and chemistry. Topics include reaction times, resistance, osmosis, potable water, and the pupil reflex. Students are tested on circuit design, solenoid behavior, magnetic fields, and water treatment methods. The exam integrates real-world applications like the impact of chlorination on health and the environmental implications of shopping bags. Questions emphasize data analysis, calculations, and practical experimentation, providing a comprehensive assessment of scientific principles. Total marks: 75.