📚 CIE IGCSE Combined Science: Syllabus & Study Guide | CIE IGCSE 综合科学：课程大纲与学习方法
The CIE IGCSE Combined Science (0653) course offers a balanced introduction to biology, chemistry and physics within a single qualification. It is ideal for students who want a broad scientific foundation without taking three separate sciences.
CIE IGCSE 综合科学（0653）是一门在单一资格中均衡涵盖生物、化学和物理的课程。它非常适合希望获得广泛科学基础但不想分别学习三门科学的学生。
This guide explains the syllabus structure, assessment format, core topics and practical study strategies to help you prepare confidently for the exam.
本指南将解释课程大纲结构、考试形式、核心主题以及实用的学习策略，帮助你自信备考。
1. Course Overview | 课程概述
Combined Science covers the essential concepts from all three disciplines. The course is designed to show how science applies to everyday life and encourages critical thinking about the natural world.
综合科学涵盖三门学科的基本概念。课程旨在展示科学如何应用于日常生活，并鼓励对自然世界的批判性思考。
The syllabus is divided into two tiers: Core and Extended. Core content is mandatory for all students, while Extended content requires deeper understanding and is only tested at the higher level.
课程大纲分为核心和拓展两个层次。所有学生都必须学习核心内容，而拓展内容则要求更深入的理解，仅在更高层次中进行测试。
By the end of the course you will have developed experimental skills, data analysis abilities and an appreciation of how science interacts with technology and the environment.
课程结束时，你将掌握实验技能、数据分析能力，并理解科学与技术、环境之间的相互作用。
2. Assessment Structure | 考试评估结构
The CIE IGCSE Combined Science assessment consists of three components that test knowledge, understanding and practical competency.
CIE IGCSE 综合科学考试由三个部分组成，分别测试知识、理解和实验能力。
| Paper | 试卷 | Format | 形式 | Weighting | 权重 |
|---|---|---|
| Paper 1 | 试卷一 | Multiple Choice (40 questions) | 选择题（40道） | 30% |
| Paper 2 (Core) or Paper 3 (Extended) | 试卷二（核心）或试卷三（拓展） | Structured Theory / 结构理论题 | 50% |
| Paper 4 (Practical) or Paper 5 (Alternative to Practical) | 试卷四（实验）或试卷五（实验替代） | Experimental skills / 实验技能 | 20% |
All papers must be taken in the same examination series. Paper 1 uses multiple choice to test recall and understanding across all three sciences. Paper 2 or 3 requires written answers, including calculations, explanations and short essays. Paper 4 is a school-based practical test, while Paper 5 is a written exam about laboratory procedures.
所有试卷必须在同一考试季参加。试卷一通过选择题测试对三门科学的记忆和理解。试卷二或试卷三要求书面作答，包括计算、解释和简答题。试卷四为校内实验操作考试，而试卷五则通过书面形式考查实验流程。
3. Physics Core Topics | 物理核心主题
The physics section focuses on the behaviour of matter and energy. Key areas include forces, motion, energy transfers, waves, electricity and magnetism.
物理部分聚焦于物质和能量的行为。关键领域包括力、运动、能量转化、波、电学和磁学。
Forces and motion: speed, velocity, acceleration, distance-time graphs and Newton's laws.
力和运动：速度、速率、加速度、距离-时间图以及牛顿运动定律。
Energy: kinetic and potential energy, energy resources and efficiency.
能量：动能和势能、能源以及能量转换效率。
Waves: properties of light and sound, reflection, refraction and the electromagnetic spectrum.
波：光和声的性质、反射、折射以及电磁波谱。
Electricity & magnetism: circuits, current, resistance, magnetic fields and electromagnets.
电与磁：电路、电流、电阻、磁场和电磁体。
At Extended level, you must also solve problems involving energy transfer and use the wave equation v = f × λ to find speed, frequency or wavelength.
在拓展层次，你还需要解决涉及能量转化的问题，并运用波速公式 v = f × λ 来求速度、频率或波长。
4. Chemistry Core Topics | 化学核心主题
The chemistry section explains how substances are formed from atoms and how chemical reactions change matter. It also covers the periodic table and laboratory techniques.
化学部分解释原子如何形成物质，化学反应如何改变物质，还包括元素周期表和实验室技术。
States of matter and changes of state; diffusion and the particle model.
物质状态和状态变化；扩散和粒子模型。
Atoms, elements and compounds; chemical symbols and formulas.
原子、元素和化合物；化学符号与化学式。
Chemical reactions: types of reactions, balancing equations, rates of reaction and reversible reactions.
化学反应：反应类型、配平方程式、反应速率和可逆反应。
Acids and bases: pH scale, neutralisation and salt preparation.
酸和碱：pH 值、中和反应和盐的制备。
Metals and electrochemistry: reactivity series, extraction of metals and simple electrolysis.
金属与电化学：金属活动性顺序、金属的冶炼和简单电解。
Remember that for ionic equations you use superscripts, for example Ca²⁺ and OH⁻. Balanced chemical equations often require state symbols like (s), (l), (g) and (aq).
请注意，离子方程式中需要使用上标，例如 Ca²⁺ 和 OH⁻。配平的化学方程式往往需要状态符号，如 (s)、(l)、(g) 和 (aq)。
5. Biology Core Topics | 生物核心主题
The biology section covers the structure and function of living organisms, the environment and health.
生物部分涵盖生物体的结构功能、环境与健康。
Cell structure and function: plant and animal cells, organelles, and levels of organisation.
细胞结构和功能：植物细胞、动物细胞、细胞器以及组织层次。
Biological molecules: carbohydrates, proteins and lipids; enzymes and their properties.
生物分子：糖类、蛋白质和脂类；酶及其特性。
Plant physiology: photosynthesis, transport in plants and transpiration.
植物生理：光合作用、植物中的物质运输和蒸腾作用。
Human physiology: digestion, respiration, the circulatory system, and homeostasis.
人体生理：消化、呼吸、循环系统和稳态调节。
Ecology: ecosystems, food chains, nutrient cycles and human impact on the environment.
生态学：生态系统、食物链、养分循环以及人类对环境的影响。
At Extended tier, you should be able to describe the action of enzymes using the lock-and-key model and explain how temperature and pH affect reaction rates.
在拓展层次，你需要能够用锁钥模型描述酶的作用，并解释温度和 pH 值如何影响反应速率。
6. Practical Skills | 实验技能
Practical work is an essential part of the course. The exam will test your ability to observe, measure, analyse and evaluate experimental results.
实验是课程的重要组成部分。考试将测试你观察、测量、分析和评估实验结果的能力。
Key skills you must master include:
你必须掌握的关键技能包括：
Reading measuring instruments accurately, for example burettes, thermometers and ammeters.
准确读取测量仪器，例如滴定管、温度计和电流表。
Recording data in a clear table, with correct units and appropriate uncertainty.
使用正确的单位和适当的不确定度，将数据记录在清晰的表格中。
Drawing graphs using suitable scales, plotting points and interpreting gradients and intercepts.
使用合适的比例尺绘制图表、描点，并解释斜率和截距。
Identifying sources of error and suggesting improvements to procedures.
识别误差来源并提出实验改进建议。
For the alternative to practical paper, you need to answer questions about named experiments, such as testing for starch or heating ice to measure melting point.
对于实验替代试卷，你需要回答关于指定实验的问题，例如检验淀粉或通过加热冰来测量熔点。
7. Core vs Extended Content | 核心与拓展内容
All students study core topics, but Extended students must cover additional material that appears only in Paper 3.
所有学生都必须学习核心主题，但拓展层次的学生需要额外学习只在试卷三中出现的材料。
For example, in physics, Extended students calculate pressure using P = F / A and use the kinetic particle model in chemistry to explain gas pressure. In biology, Extended students study the structure of the heart in more detail and learn about the role of hormones.
例如，在物理中，拓展学生需要使用公式 P = F / A 计算压强；在化学中，他们需要利用粒子运动模型解释气体压强；在生物中，他们需要更深入地学习心脏结构以及激素的作用。
When preparing, check the syllabus document for the list of 'Extended only' statements. That ensures you do not waste time on material outside your tier.
备考时请查阅大纲文件中仅限拓展层次的内容清单，这样可以避免在不属于你考试层次的内容上浪费时间。
8. Building a Study Plan | 制定学习计划
A realistic study plan is the foundation of exam success. Divide your revision into weekly units that cover all three sciences evenly.
切实可行的学习计划是考试成功的基础。将复习分为每周单元，均衡覆盖三门科学学科。
Here is a suggested timeline for a 12-week revision period:
以下是一个建议的12周复习时间表：
| Weeks | 周次 | Focus | 重点 |
|---|---|
| 1–3 | Physics: forces, motion, energy |
| 1–3 | 物理：力、运动、能量 |
| 4–6 | Chemistry: atoms, bonding, reactions |
| 4–6 | 化学：原子、化学键、反应 |
| 7–9 | Biology: cells, plants, human body |
| 7–9 | 生物：细胞、植物、人体 |
| 10–12 | Past papers, practical questions and weaker topics |
| 10–12 | 历年真题、实验题目和薄弱主题 |
Set aside at least 30 minutes each day for revision. Use short cycles of learning, testing and reviewing rather than reading notes repeatedly.
每天至少安排30分钟进行复习。建议采用“学习—测试—回顾”的短周期方法，而不是反复阅读笔记。
9. Effective Note-taking and Memory | 高效笔记与记忆
Good notes compress long sections into concise summaries that are easy to revise.
好的笔记能将冗长的章节压缩为简洁的摘要，便于复习。
Three powerful techniques are:
三种高效技巧如下：
Mind maps: connect related ideas visually, such as the carbon cycle or energy transfer pathways.
思维导图：将相关概念用可视化方式连接，例如碳循环或能量转化路径。
Flashcards: write questions on one side and answers on the other. Use these for quick recall practice.
闪卡：一面写问题，另一面写答案。用于快速回忆训练。
Summary tables: compare similar concepts like exothermic vs endothermic reactions, or arteries vs veins.
汇总表格：对比相似概念，如放热反应与吸热反应，或动脉与静脉的区别。
Try to explain a concept aloud in your own words without looking at notes. If you cannot, that is a sign you need to revisit the topic.
尝试不看笔记用自己的话出声解释一个概念。如果你做不到，说明你需要重新复习这个主题。
10. Working with Past Papers | 利用历年真题
Past papers are the most reliable way to familiarise yourself with question formats and time pressure.
历年真题是熟悉题型和时间压力的最可靠方法。
Complete at least one full paper each week during the final month of revision.
在最后一个月复习中，每周至少完成一套完整试卷。
Start with the multiple-choice paper. This tests speed and accuracy.
从选择题试卷开始。它考查速度和准确性。
Then attempt the theory paper. Pay attention to mark allocation; write answers that match the number of marks.
然后做理论卷。注意分值分配；答题量应与分数相匹配。
Finally, work on practical questions. Even without a laboratory, you can rehearse by describing the apparatus and method.
最后练习实验题目。即使没有实验室，你也可以通过描述仪器和方法来进行演练。
After marking, keep a list of every error you made. Review that list before the next paper to avoid repeating mistakes.
批改后，记录每一个错误。下次做试卷前复习这份清单，避免重复犯错。
11. Common Pitfalls and How to Avoid Them | 常见误区与规避
Many students lose marks in predictable places. Knowing these mistakes can help you avoid them.
许多学生在可预测的地方丢分。了解这些错误可以帮助你避免。
Mixing units: always use SI units (kilograms, metres, seconds) unless the question tells you otherwise.
单位混淆：除非题目另有要求，始终使用 SI 单位（千克、米、秒）。
Forgetting state symbols in chemistry: write (s), (l), (g) or (aq) in equations.
忘记化学状态符号：在方程式中写 (s)、(l)、(g) 或 (aq)。
Misreading graphs: check the axes carefully and do not assume a straight line is proportional.
读图错误：仔细观察坐标轴，不要以为直线就一定成正比。
Using vague biology definitions: for example, 'respiration is breathing' is wrong. Respiration is a chemical reaction releasing energy in cells.
生物定义模糊：例如“呼吸就是呼吸”是错误的。细胞呼吸是在细胞中释放能量的化学反应。
To reduce errors, underline keywords in the question such as 'calculate', 'explain' or 'state'. This keeps your answer focused on what is being asked.
为减少错误，请在题目中勾画关键词，例如“计算”“解释”或“指出”。这能让你的答案紧扣题目要求。
12. Exam-Day Strategies | 考试日策略
Your preparation will only translate into good marks if you manage exam time effectively.
只有有效管理考试时间，你的备考成果才能转化为好成绩。
Here are practical strategies for each paper:
以下是针对每份试卷的实用策略：
Multiple choice: do the easiest questions first, then return to harder ones. Eliminate obviously wrong options before guessing.
选择题：先做最容易的题，再回头处理难题。先排除明显错误的选项，再猜测。
Theory paper: allocate roughly one minute per mark. If you are stuck, move on and come back later.
理论卷：大约每分钟对应一分。如果你卡住，先跳到下一题，稍后再回来。
Practical paper: read the method carefully before performing or describing it. Include sufficient detail in your written answer, such as the volume of liquid, number of readings and safety precautions.
实验卷：在操作或描述前细致阅读实验方法。书面回答中提供足够细节，例如液体体积、读数次数和安全注意事项。
Keep calm and start with the questions you are most confident about. This builds momentum and reduces anxiety.
保持冷静，从你最自信的题目开始。这样可以逐渐进入状态并减少焦虑。
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