Science Combined 0653/42 Oct Nov 2024 | Cambridge IGCSE Past Papers With Mark Scheme

1. Plant Biology & Photosynthesis | Flower structure, pollination agents, leaf adaptations, mesophyll function, and impact of eutrophication on aquatic ecosystems.

2. Group I Elements & Periodic Table Trends | Reactions of alkali metals with water, flame tests, density predictions, and structure of sodium chloride.

3. Physics of Motion & Energy | Speed-time graph interpretation, acceleration and kinetic energy calculations, and energy storage in car batteries.

4. Circulatory System & Disease | Blood vessel adaptations, coronary heart disease prevalence, and respiratory diseases caused by smoking.

5. Electrolysis & Chemical Reactions | Products of sodium chloride electrolysis, ionic equations, and identifying gases formed at electrodes.

6. Electric Circuits & Resistance | Calculating resistance in series and parallel circuits, determining total circuit current, and voltage readings.

7. Enzyme Function & Protein Digestion | Substrate specificity, protease function, effects of pH on enzyme activity, and dietary protein requirements.

8. Carbon Dioxide & Environmental Impact | Sources from combustion and decomposition, greenhouse gas effects, and climate change concerns.

9. Optics & Thermal Physics | Converging lens ray diagrams, wax density and volume calculations, molecular behavior in phase changes, and convection currents in liquids.