Cambridge IGCSE · Analysis & Prediction
2025 Cambridge IGCSE Sciences - Co-ordinated (Double) (0654) Past Paper: Analysis & Answers
The October/November 2025 Cambridge IGCSE Co-ordinated Sciences (Double) 0654 examination spans multiple choice, theory, and practical papers. It comprehensively assesses core and extended topics in Biology, Chemistry, and Physics, highlighting organic chemistry, chemical energetics, mechanical dynamics, circuit electricity, cell biology, and experimental planning.
Updated: Jun 13, 2026
Paper breakdown
Examiner insights
Official reportCommon pitfalls
- Confusing 'weight' and 'mass', incorrectly defining weight as the quantity of matter instead of the gravitational force acting on an object.
- In Chemistry, drawing polymer repeat units without showing open extension bonds at the ends leads to lost marks.
Misconceptions
- Confusing the role of the cell membrane and cell wall is common; only the cell membrane is selectively permeable.
- In Physics, many candidates mistakenly add parallel resistors directly (e.g. R1 + R2) instead of using the parallel reciprocal formula, failing to realize the combined resistance must be less than the smallest individual resistor.
Where marks are lost
- In the practical planning questions, marks are frequently lost for not specifying at least 5 different values of the independent variable.
- Neglecting to state controlled variables (such as water volume, temperature, or size of the beaker) or failing to explain how to process results.
Estimated grade boundary
Updated: Jun 13, 2026
| Grade | Mark | Percentage |
|---|---|---|
| A* | 180/240 | 75% |
| A | 149/240 | 62% |
| B | 118/240 | 49% |
| C | 87/240 | 36% |
| D | 74/240 | 31% |
| E | 61/240 | 25% |
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