Science Combined 0653/61 Oct Nov 2024 | Cambridge IGCSE Past Papers With Mark Scheme

1. Onion Structure & Microscopy | Drawing a detailed diagram of a cut onion, calculating magnification, and testing for starch using iodine.

2. Plant Growth & Mineral Investigation | Planning an experiment to study the effect of mineral concentration on onion plant growth, including variables and data collection.

3. Heating a Solid & Mass Change | Safety precautions for heating substances, calculating mass loss, percentage decrease, and identifying chemical reactions.

4. Spring Extension & Hooke’s Law | Measuring extension of springs under different loads, avoiding parallax errors, plotting a graph of extension vs. load.

5. Chemical Identification Tests | Identifying ions in a white solid using precipitation and gas tests, interpreting results from limewater and ammonia reactions.

6. Practical Accuracy & Improvements | Using blue Bunsen burner flames, improving experimental reliability, and minimizing errors in measuring and recording data.