📚 Year 11 CAIE Physics: Complete Syllabus Breakdown | Year 11 CAIE 物理：课程大纲全面解析
If you're studying Year 11 Physics under the Cambridge Assessment International Education (CAIE) board, you'll be tackling IGCSE Physics (0625) — a rigorous yet exciting course that builds the foundation for A Level Physics and beyond. This article provides a complete syllabus breakdown, unpacking every major topic along with essential tips for exam success. By understanding what's covered, how the topics connect, and what examiners expect, you can plan your revision more effectively and approach the final examinations with confidence.
如果你正在学习剑桥国际考评委员会 (CAIE) 的 Year 11 物理，你接触的正是 IGCSE 物理 (0625) 课程 —— 一门严谨又引人入胜的科目，为 A Level 物理及更高层次的科学学习打下坚实基础。本文将为你全面解析课程大纲，梳理每一个核心主题，并提供取得优异考试成绩的关键建议。在清楚了要学什么、各主题如何关联以及考官的期待之后，你就能更有效地规划复习，自信迎接终考。
1. Syllabus Structure and Assessment Overview | 大纲结构与评估概览
The CAIE IGCSE Physics syllabus is divided into five main content areas: General Physics, Thermal Physics, Wave Properties, Electricity and Magnetism, and Atomic Physics. In the latest (2023–2025) specification there is an additional topic on Space Physics which covers the Earth and the Solar System. Your final grade comes from three papers: a multiple‑choice paper, a structured theory paper, and a practical or alternative‑to‑practical paper.
CAIE IGCSE 物理大纲共分为五大知识板块：普通物理、热物理、波的性质、电学与磁学，以及原子物理。在最新的 (2023–2025) 考纲中，还增加了空间物理这一主题，涵盖地球与太阳系的内容。你的最终成绩由三张试卷构成：一份选择题卷、一份结构化理论卷，以及一份实验或实验替代卷。
| Paper | Type | Duration | Weighting |
|---|---|---|---|
| Paper 1 / 2 | Multiple Choice (40 questions) | 45 min | 30% |
| Paper 3 / 4 | Structured Theory (short‑answer and extended) | 1 h 15 min (Core) / 1 h 15 min (Extended) | 50% |
| Paper 5 / 6 | Practical Test or Alternative to Practical | 1 h 15 min / 1 h | 20% |
The extended tier (Papers 2, 4 and 5) covers the full syllabus with grades available A* to E, while the core tier (Papers 1, 3 and 6) covers only the core content with grades available C to G. Most Year 11 candidates aim for the extended tier, so we will focus on the extended content.
扩展层级 (卷 2、4、5) 覆盖完整大纲，成绩等级为 A* 至 E；核心层级 (卷 1、3、6) 仅覆盖核心内容，成绩为 C 至 G。大多数 Year 11 考生选择扩展层级，因此本文我们将以扩展内容为主。
2. General Physics: Motion and Measurements | 普通物理：运动与测量
distance, displacement, speed, velocity and acceleration. Remember that speed is a scalar — it only has magnitude — nd v² = u² + 2 a s, are essential tools for solving uniformly accelerated motion problems.
运动是学习的起点。你需要定义路程、位移、速率、速度和加速度。要记住速率是标量 —— 只有大小；速度是矢量，既有大小又有方向。运动学方程，如 v = u + a t、s = u t + ½ a t² 和 v² = u² + 2 a s，是解答匀加速运动问题的重要工具。
Distance‑time and speed‑time graphs must be understood thoroughly. The gradient of a distance‑time graph gives the speed, while the gradient of a speed‑time graph gives the acceleration, and the area under a speed‑time graph gives the distance travelled. Free‑fall experiments often use a light gate or a stopwatch to determine the acceleration due to gravity, g, which is approximately 9.8 m/s².
你必须透彻理解距离‑时间图与速率‑时间图。距离‑时间图的斜率表示速率；速率‑时间图的斜率表示加速度，而速率‑时间图下方的面积则表示物体通过的距离。自由落体实验常用光闸或秒表来测量重力加速度 g，其值约为 9.8 m/s²。
3. Forces, Momentum and Turning Effects | 力、动量与转动效应
Newton' u must be able to draw and interpret vector force diagrams, calculate resultant forces and apply the equation F = m a.
牛顿三大运动定律是此主题的支柱。质量是惯性的量度，而重量则是作用在物体上的重力 (W = m g)。你必须会绘制并解读矢量力图，计算合力，以及应用 F = m a 的公式。
ter. The concept of impulse, F Δt = Δ(m v), links force and time to the change in momentum. The turning effect of a force — the moment — rom the pivot. Objects in equilibrium have zero resultant force and zero resultant moment.
动量守恒原理解释了碰撞与爆炸现象。在封闭系统中，作用前总动量等于作用后总动量。冲量的概念，F Δt = Δ(m v)，将力与时间同动量的变化联系起来。力所产生的转动效应 —— 力矩 —— 由力 × 到支点的垂直距离计算。处于平衡状态的物体，其合外力为零，合外力矩也为零。
4. Energy, Work and Power | 能量、功与功率
tates that energy cannot be created or destroyed, only transformed. The work done when a force moves an object is W = F d, and the work done against gravity translates directly into gravitational potential energy: Eₚ = m g h.
能量能以多种形式储存：动能、重力势能、化学能、弹性势能、热能等。能量守恒定律指出，能量既不能被创造也不能被消灭，只能从一种形式转化为另一种形式。当一个力移动物体时所做功为 W = F d，而克服重力所做的功则直接转化为重力势能：Eₚ = m g h。
ork or transferring energy: P = W / t = E / t. Efficiency is a calculation you must master — the ratio of useful output energy to total input energy, often expressed as a percentage.
动能公式为 Eₖ = ½ m v²。功率是做功或传能的快慢：P = W / t = E / t。效率是必须熟练掌握的计算 —— 它是有用输出能量与总输入能量的比值，通常用百分数表示。
5. Pressure and Density | 压强与密度
ent method). Pressure in solids depends on the force applied and the area over which it acts: p = F / A. In fluids, pressure increases with depth according to p = ρ g h, and pressure is transmitted equally throughout a liquid (Pascal's principle), which underpins hydraulic machines.
密度就是单位体积的质量：ρ = m / V。你可能需要利用量筒（排水法）来测定不规则固体的密度。固体中的压强取决于所施加的力及其作用面积：p = F / A。在流体中，压强随深度而增加，关系式为 p = ρ g h，而且在液体中压强向各个方向等大传递（帕斯卡原理），这是液压机械的基础。
s pressure differences. Remember that standard atmospheric pressure is about 1.0 × 10⁵ Pa.
水银气压计和压力计是测量大气压与气体压强差的经典仪器。要记住标准大气压约为 1.0 × 10⁵ Pa。
6. Thermal Physics and States of Matter | 热物理与物质的状态
each state. Brownian motion provides evidence for the random motion of molecules. The Kelvin temperature scale starts at absolute zero (0 K = −273 °C) and is crucial for gas law calculations.
分子动理学模型解释了固体、液体和气体的行为。你需要描述各状态下粒子的排布与运动方式。布朗运动为分子的无规则运动提供了证据。热力学温标从绝对零度 (0 K = −273 °C) 开始，在气体定律计算中至关重要。
The gas laws relate pressure, volume and temperature: p V = constant (Boyle's law), V / T = constant (Charles' sorbed or released without a temperature change; the specific latent heat L is the energy per unit mass needed for a change of state: Q = m L.
气体定律把压强、体积和温度联系在一起：p V = 常量 (玻意耳定律)，V / T = 常量 (查理定律)，p / T = 常量 (压强定律)。组合气体方程 p₁ V₁ / T₁ = p₂ V₂ / T₂ 是考试常客。物态变化过程中，温度不变却吸收或释放能量；比潜热 L 是单位质量物质发生物态变化所需能量：Q = m L。
7. Wave Properties and Sound | 波的性质与声音
itudinal waves (e.g., sound). Key quantities are wavelength (λ), frequency (f), amplitude and wave speed (v), linked by the universal wave equation: v = f λ.
波传递能量而不传递物质。你需要了解横波（例如水波、光波）与纵波（例如声音）的区别。关键物理量有波长 (λ)、频率 (f)、振幅和波速 (v)，它们通过通用波动方程 v = f λ 联系起来。
Reflection, refraction and diffraction are wave behaviours you must be able to illustrate with diagrams. Refraction occurs when a wave changes speed as it enters a new medium, causing a change in direction if the wave hits the boundary at an angle. The diffraction of waves is most pronounced when the gap size is comparable to the wavelength. Sound waves are produced by vibrating objects and travel fastest in solids, slower in liquids and slowest in gases.
反射、折射和衍射是你必须能用示意图说明的波的行为。当波进入新介质时速度改变，就会发生折射；若波斜射到边界，方向就会偏折。当缝隙尺寸与波长相近时，波的衍射最为显著。声波由振动着的物体产生，在固体中传播最快，液体中较慢，气体中最慢。
8. Light and the Electromagnetic Spectrum | 光与电磁波谱
ot need a medium. The law of reflection states that the angle of incidence equals the angle of reflection. Refraction of light is governed by Snell' e refractive index. Total internal reflection occurs when light travels from a denser to a less dense medium at an angle greater than the critical angle, a principle used in optical fibres.
光是一种不需要介质的横波。反射定律指出，入射角等于反射角。光的折射遵循斯涅耳定律：n₁ sin θ₁ = n₂ sin θ₂，其中 n 为折射率。当光从光密介质射向光疏介质且入射角大于临界角时，会发生全内反射，这一原理被用于光纤。
t wavelength to shortest: radio waves, microwaves, infrared, visible light, ultraviolet, X‑ × 10⁸ m/s. You must be able to recall typical uses, dangers and properties of each region.
电磁波谱按波长和频率将所有电磁辐射分类。从长波到短波依次为：无线电波、微波、红外线、可见光、紫外线、X 射线和伽马射线。所有电磁波在真空中的速度均为光速，3.0 × 10⁸ m/s。你需要记住各类电磁波的典型用途、危害和特性。
9. Electricity: Circuits and Components | 电学：电路与元件
e (p.d.) is the energy transferred per unit charge across a component. Resistance is defined by R = V / I and obeys Ohm's law for a metallic conductor kept at constant temperature.
电流是电荷流动的速率：I = Q / t。电动势 (e.m.f.) 是每单位电荷所获得的全部能量，而电势差 (p.d.) 则是每单位电荷经过某元件时所转化的能量。电阻由 R = V / I 定义，对于温度恒定的金属导体，它服从欧姆定律。
ch branch, and the combined resistance is found using 1/Rₜ = 1/R₁ + 1/R₂ + ... You must be able to calculate current, voltage, resistance and power (P = I V = I² R = V² / R) in a variety of circuits.
串联电路中各处电流相等，总电阻为各电阻之和：Rₜ = R₁ + R₂ + … 并联电路各支路两端电势差相同，总电阻由 1/Rₜ = 1/R₁ + 1/R₂ + … 求得。你必须能够在多种电路组合中计算电流、电压、电阻和功率 (P = I V = I² R = V² / R)。
10. Electromagnetism and Induction | 电磁学与电磁感应
Magnetic fields are regions where a magnetic force is experienced. Field lines point from the north to the south pole. An electromagnet uses a coil of wire (solenoid) around a soft iron core to produce a strong, controllable magnetic field. The right‑hand grip rule gives the direction of the magnetic field around a current‑carrying conductor.
磁场是能够感受到磁力的区域。磁感线从北极指向南极。电磁铁利用绕在软铁芯上的线圈 (螺线管) 来产生强而可控的磁场。右手螺旋定则可用来确定载流导体周围磁场的方向。
The motor effect describes the force experienced by a current‑carrying conductor in a magnetic field: F = B I L for a perpendicular field. Fleming's left‑ uts magnetic field lines, which is the principle behind generators and transformers. A transformer changes voltage according to Vₚ / Vₛ = Nₚ / Nₛ, and assuming 100% efficiency, Iₚ Vₚ = Iₛ Vₛ.
电动机效应描述了载流导体在磁场中受到的力：在垂直磁场中 F = B I L。弗莱明左手定则预测力、磁场与电流的方向。电磁感应是指导体切割磁感线时产生电动势的现象，这是发电机与变压器的基础。变压器依据 Vₚ / Vₛ = Nₚ / Nₛ 来改变电压，假设效率为 100%，则 Iₚ Vₚ = Iₛ Vₛ。
11. Nuclear Physics and Radioactivity | 核物理与放射性
on) number A = Z + N. Isotopes are atoms of the same element with different numbers of neutrons. Radioactive decay is a random process in which unstable nuclei emit α‑particles (helium nuclei), β‑particles (fast electrons) or gamma rays (high‑energy EM waves).
原子由原子核（质子和中子）和绕核运动的电子组成。原子序数 (质子数) Z 决定了元素种类，而质量数 (核子数) A = Z + N。同位素是同种元素中中子数不同的原子。放射性衰变是一种随机过程，不稳定的原子核会发射 α 粒子 (氦核)、β 粒子 (高速电子) 或 γ 射线 (高能电磁波)。
Each type of radiation has different ionising ability and penetration range. The background radiation comes from rocks, space and artificial sources. Half‑life is the time taken for half the radioactive nuclei in a sample to decay; you may be asked to calculate it from decay curves or numerical data. Nuclear fission and fusion are also covered: fission is the splitting of a large nucleus, while fusion is the joining of small nuclei — the energy source of the Sun.
每种辐射的电离能力和穿透范围各有不同。本底辐射来自岩石、宇宙和人造源。半衰期是指样品中放射性原子核衰减一半所需的时间；你可能需要根据衰变曲线或数值数据计算半衰期。核裂变与核聚变也在大纲之内：裂变是重核的分裂，聚变则是轻核的结合 —— 正是太阳的能量来源。
12. Space Physics and Exam‑Ready Tips | 空间物理与备考技巧
In the Space Physics topic, you explore the Earth's rotation, seasons, and the phases of the moon. You learn that the Earth orbits the Sun in an elliptical path, that the Solar System consists of planets, moons, asteroids and comets, and that the universe is composed of billions of galaxies. The life cycle of a star, from nebula to main sequence and eventually to red giant, white dwarf, neutron star or black hole, is a fascinating part of the syllabus.
在空间物理主题中，你将探索地球自转、季节更替和月相变化。你将学到地球沿椭圆形轨道绕太阳运行，太阳系由行星、卫星、小行星和彗星组成，而宇宙由数十亿星系构成。恒星的生命周期，从星云到主序星，再到红巨星、白矮星、中子星或黑洞，是大纲中极为引人入胜的内容。
For your exam preparation, start by thoroughly reading the syllabus document and using the listed learning objectives as a checklist. Practise past papers systematically, paying attention to command words such as 'describe', 'explain' and 'calculate'. For the practical paper, revise common experiments: measuring g, finding the focal length of a lens, investigating resistance and plotting cooling curves. Finally, stay calm during the exam, read the questions carefully, show all your working, and always include units with your numerical answers.
在备考方面，首先要仔细阅读考纲文件，把列出的学习目标当作检查清单。系统性地练习历年真题，注意 'describe'、'explain' 和 'calculate' 等指令词。对于实验卷，重温常见实验：测量 g、求透镜焦距、研究电阻以及绘制冷却曲线。最后，考试时保持冷静，仔细审题，展示所有解题步骤，并在数值答案中始终带上单位。
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