Sciences Co-ordinated 0654/43 Oct Nov 2024 | Cambridge IGCSE Past Papers With Mark Scheme

1. Gas Exchange & Respiratory System | Structure of alveoli, breathing rate changes during exercise, oxygen and carbon dioxide transport in blood.

2. Chemical Reactions & Organic Compounds | Hydrocarbon properties, polymerization of ethene, combustion of propane, reactivity with bromine.

3. Electric Circuits & Thermistors | Investigating resistance changes with temperature, calculating charge flow, analyzing power output.

4. Water Transport in Plants | Root hair cell function, effect of humidity on transpiration, cohesion-tension in xylem.

5. Rates of Reaction & Energy Changes | Measuring gas production in acid-carbonate reactions, collision theory, exothermic reaction diagrams.

6. Waves & Car Suspension Systems | Hooke’s Law in spring compression, ultrasound detection of cracks, longitudinal wave properties.

7. Digestion & Absorption | Villi structure and function, impact of coeliac disease, protein tests, mechanical vs. chemical digestion.