Science Combined 0653/51 Oct Nov 2024 | Cambridge IGCSE Past Papers With Mark Scheme

1. Onion Structure & Microscopy | Drawing a detailed diagram of an onion cross-section, measuring diameter, calculating magnification, and performing an iodine test for starch.

2. Plant Growth & Mineral Investigation | Planning an experiment to study the relationship between soil mineral concentration and onion growth, including controlled variables and data analysis.

3. Heating a Solid & Mass Change | Measuring mass before and after heating, calculating mass loss and percentage change, and ensuring proper heating with a blue Bunsen burner flame.

4. Chemical Identification Tests | Reacting a solid with nitric acid, testing for gases, and interpreting observations using qualitative analysis guidelines.

5. Spring Extension & Hooke’s Law | Measuring spring extension with different loads, avoiding parallax errors, plotting extension vs. load graphs, and comparing results for single and double springs.

6. Experimental Accuracy & Error Minimization | Using set squares for accurate measurements, overcoming practical difficulties in reading values, and improving procedure reliability.