Science Combined 0653/32 Oct Nov 2024 | Cambridge IGCSE Past Papers With Mark Scheme

1. Human Digestive System & Enzyme Activity | Identifying alimentary canal organs, enzyme functions, temperature effects on enzyme activity, and fat digestion tests.

2. Reaction Rates & Metal Reactivity | Investigating calcium and hydrochloric acid reaction, gas testing, comparing reactivity of iron, magnesium, and zinc.

3. Electric Circuits & Resistance | Calculating resistance using voltage and current, analyzing ammeter readings in series and parallel circuits.

4. Circulatory System & Blood Components | Heart structure, blood vessel identification, effects of exercise on circulation, and differences between red blood cells and plasma.

5. Air Composition & Pollution | Identifying gases in air, effects of carbon monoxide, methane’s role as a greenhouse gas, and hydrocarbon properties.

6. Forces & Motion | Work and power calculations for a moving cart, hearing frequency range comparison between humans and horses.

7. Photosynthesis & Food Chains | Starch production in plants, conditions for photosynthesis, role of minerals, and constructing food chains.

8. Electrolysis of Sulfuric Acid | Identifying cathode/anode reactions, elements forming inert electrodes, and electrolyte properties.

9. Optics & Thermal Expansion | Ray diagrams for lenses, density changes in melting wax, weight calculations, and electromagnetic spectrum placement.