Sciences Co-ordinated 0654/33 Oct Nov 2024 | Cambridge IGCSE Past Papers With Mark Scheme

1. Human Reproduction & Fertilization | Male reproductive system identification, sperm vs. egg size comparison, respiration in sperm cells, fertilization process.

2. Chemical Substances & Reactions | Uses of common substances, molecular composition of sulfuric acid, reaction of magnesium with acid, separation techniques.

3. Electromagnetic Spectrum & Motion | Infrared and ultraviolet placement, speed of EM waves, echo definition, converging lens ray diagram, speed calculation from graphs.

4. Plant Transport & Mineral Nutrition | Xylem and phloem functions, importance of nitrate and magnesium ions, comparison of photosynthesis and germination requirements.

5. Covalent Bonding & Acidity | Hydrogen chloride molecular structure, testing for acids, properties of Group VII elements, periodic trends in halogens.

6. Radioactivity & Medical Applications | Properties of alpha, beta, gamma radiation, their ionization power, X-ray and ultrasound uses, cooling effect of ethanol evaporation.

7. Enzymes & Digestion | pH effects on enzyme activity, classification of enzymes, digestive processes, absorption vs. assimilation similarities.

8. Metal Recycling & Electrolysis | Arrangement and motion of copper atoms, electroplating process, electrolysis definition correction.

9. Energy Resources & Electricity Generation | Renewable vs. non-renewable resources, coal power station process, efficiency limitations, parallel vs. series circuits.

10. Genetics & Evolution | Continuous variation in humans, natural selection sequence, allele definition, DNA location in cells.

11. Atomic Structure & Hydrocarbons | Neutron number calculation, saturated vs. unsaturated hydrocarbons, cracking process, combustion and greenhouse gas formation.

12. Heat Transfer & Electricity | Convection in a classroom heater, temperature measurement, sound wave travel, magnetic field in solenoids.