Cambridge IGCSE · 分析與預測
2025 Cambridge IGCSE Sciences - Co-ordinated (Double) (0654) Past Paper 分析與預測
A comprehensive diagnostic review of the Cambridge IGCSE Co-ordinated Sciences (0654) October/November 2025 examination series across the Core, Extended, and Practical components. This series tested foundational and advanced topics across Biology, Chemistry, and Physics, with a strong emphasis on experimental design, mathematical stoichiometry, electrical circuits, and wave phenomena.
更新: 2026年6月13日
難度 3.2/5
總分
220
時間
255 分鐘
最高頻課題
—
分卷
卷二 選擇題 (Extended): 40 分 · 45 分鐘Paper 4 Theory (Extended): 120 分 · 120 分鐘Paper 6 Alternative to Practical: 60 分 · 90 分鐘
考官重點
官方報告整理常見失分位
- Confusing the definition of mass (quantity of matter) with weight (gravitational force acting on an object).
- Failing to convert time from minutes to seconds when calculating electrical charge with Q = It (e.g. in Question 11(a)(i) of Paper 42).
- Forgetting to include state symbols when constructing balanced ionic equations (e.g., Fe3+(aq) + 3OH-(aq) -> Fe(OH)3(s)).
- Drawing sketchy, broken, or multi-line biological sketches rather than clear, continuous single outlines.
常見誤解
- Believing that temperature changes only affect the speed of particles rather than directly correlating to collision frequency and success rates under collision theory.
- Assuming that adding impurities decreases the boiling point of a liquid when they actually elevate it.
- Believing that parallel circuits increase the total resistance rather than decreasing it below that of the individual resistors.
失分原因
- Incorrectly naming the hormone insulin as a product of the liver instead of the pancreas.
- Mislabeling the trachea and bronchi, or drawing label lines that do not clearly touch the target organ structure.
- Calculating Rf values in chromatography without showing the full measurement working or failing to quote answers to the requested significant figures.
等級 cut-off 估算
更新: 2026年6月13日
| 等級 | 分數 | 百分比 |
|---|---|---|
| A* | 173/240 | 72% |
| A | 144/240 | 60% |
| B | 115/240 | 48% |
| C | 86/240 | 36% |
| D | 74/240 | 31% |
| E | 62/240 | 26% |
Official grade boundaries published by Cambridge IGCSE grade thresholds (official).
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