📚 Year 10 CAIE Physics: Comprehensive Syllabus Breakdown | Year 10 CAIE 物理：课程大纲全面解析
Year 10 of the Cambridge IGCSE Physics course (CAIE 0625) establishes the foundational principles that pupils will build upon in Year 11 and beyond. This article provides a complete walkthrough of the core topics, key definitions, essential equations, and common pitfalls. Each section is structured to give you both a conceptual understanding and the precise scientific language examiners expect.
CAIE IGCSE 物理（0625）的 Year 10 阶段为后续学习打下坚实基础。本文全面梳理核心课题、关键定义、必备方程和常见易错点。每个部分既帮助你建立概念理解，也提供考官期望的严谨科学表述。
1. Syllabus Overview and Assessment Structure | 课程大纲与考核结构总览
The CAIE IGCSE Physics syllabus is divided into five broad topic areas: General Physics, Thermal Physics, Waves, Electricity and Magnetism, and Nuclear Physics. In Year 10, most schools cover General Physics, Thermal Physics, and the early parts of Waves and Electricity. The final assessment consists of three papers: a multiple-choice paper (40 questions, 40 marks), a structured theory paper (80 marks), and a practical or alternative-to-practical paper (40 marks). Understanding the weight of each topic helps you plan your revision efficiently.
CAIE IGCSE 物理大纲分为五大板块：普通物理、热物理、波、电磁学和原子物理。大多数学校在 Year 10 会讲解普通物理、热物理以及波和电学的初步内容。最终考试由三份试卷组成：选择题卷（40题，40分）、结构化理论卷（80分）和实验或实验替代卷（40分）。了解各主题的权重可以帮助你高效规划复习。
2. Physical Quantities, Units and Measurements | 物理量、单位与测量
Every physical quantity has a numerical value and a unit. The International System of Units (SI) uses base units such as metre (m), kilogram (kg), second (s), ampere (A), kelvin (K), and mole (mol). Pupils must be able to recall common prefixes – for example, kilo (10³), centi (10⁻²), milli (10⁻³), and micro (10⁻⁶). When measuring length, volume, time or temperature, you must know how to read scales, handle parallax error, and take repeat readings to improve reliability. A scalar has magnitude only (e.g. speed), whereas a vector has both magnitude and direction (e.g. velocity, force).
每个物理量都有数值和单位。国际单位制（SI）使用基本单位：米（m）、千克（kg）、秒（s）、安培（A）、开尔文（K）和摩尔（mol）。学生必须记住常用词头，例如 kilo (10³)、centi (10⁻²)、milli (10⁻³) 和 micro (10⁻⁶)。在测量长度、体积、时间或温度时，你要学会正确读数、避免视差误差，并通过多次测量提高可靠性。标量只有大小（如速率），而矢量既有大小又有方向（如速度、力）。
3. Kinematics: Describing Motion | 运动学：描述运动
Kinematics is the study of motion without considering its causes. Key quantities include displacement, speed, velocity, and acceleration. Speed is the distance travelled per unit time; velocity is speed in a given direction. Acceleration is the rate of change of velocity. The four equations of uniformly accelerated motion are central. For an object starting with initial velocity u, final velocity v, acceleration a, displacement s, and time t, we use:
运动学研究物体的运动而不考虑引起运动的原因。关键物理量包括位移、速率、速度和加速度。速率是单位时间内通过的路程；速度是给定方向上的速率。加速度是速度的变化率。匀加速运动的四个方程是核心。对于初始速度 u、末速度 v、加速度 a、位移 s 和时间 t，我们使用：
v = u + at
s = ut + ½at²
v² = u² + 2as
s = ½(u + v)t
A distance–time graph has gradient giving speed, while a speed–time graph has gradient giving acceleration and area under the curve giving distance travelled. Negative acceleration (deceleration) is often tested. For objects in free fall near the Earth’s surface, the acceleration due to gravity g is approximately 9.8 m s⁻² and is directed downwards.
距离–时间图的斜率给出速率，而速度–时间图的斜率给出加速度，曲线下的面积给出行驶的距离。负加速度（减速）经常出现。对于地球表面附近的自由落体，重力加速度 g 约为 9.8 m s⁻²，方向向下。
4. Dynamics: Forces and Newton’s Laws | 动力学：力与牛顿定律
A force is a push or a pull, measured in newtons (N). Newton’s First Law states that an object remains at rest or in uniform motion unless acted upon by a resultant force. Newton’s Second Law tells us that resultant force F = mass m × acceleration a, or F = ma. Newton’s Third Law reminds us that for every action there is an equal and opposite reaction. Friction is a force that opposes motion and converts kinetic energy into thermal energy. When drawing free-body diagrams, always label the weight (mg), normal contact force, tension, friction and applied forces clearly.
力是推或拉，以牛顿（N）为单位。牛顿第一定律指出，物体将保持静止或匀速直线运动状态，除非受到合外力作用。牛顿第二定律告诉我们，合外力 F = 质量 m × 加速度 a，即 F = ma。牛顿第三定律提醒我们，每一个作用力都有一个大小相等、方向相反的反作用力。摩擦力是阻碍运动的力，将动能转化为热内能。在画受力分析图时，务必清晰标出重力（mg）、支持力、拉力、摩擦力和外加力。
5. Mass, Weight and Density | 质量、重量与密度
Mass is the amount of matter in an object, measured in kilograms, and is a scalar. Weight is the gravitational force on the object, measured in newtons, and is a vector. The relationship is W = mg, where W is weight, m is mass and g is gravitational field strength (≈ 10 N kg⁻¹ on Earth). Density ρ (rho) is mass per unit volume: ρ = m / V. The unit is kg m⁻³ or g cm⁻³. Regular solids use geometric formulas; irregular solids use the displacement method with a measuring cylinder. Common densities – water (1.0 g cm⁻³), iron (≈ 7.9 g cm⁻³) – should be remembered.
质量是物体所含物质的多少，以千克为单位，是标量。重量是作用在物体上的重力，以牛顿为单位，是矢量。关系式为 W = mg，其中 W 为重力，m 为质量，g 为重力场强度（地球上约为 10 N kg⁻¹）。密度 ρ 是单位体积的质量：ρ = m / V。单位为 kg m⁻³ 或 g cm⁻³。规则固体用几何公式计算体积；不规则固体用量筒排水法测量。应该记住常见密度——水（1.0 g cm⁻³），铁（≈ 7.9 g cm⁻³）。
6. Effects of Forces: Stretching, Turning and Pressure | 力的作用效果：拉伸、转动与压强
Forces can change the shape of an object. Hooke’s Law states that for a spring, extension x is proportional to the applied force F, up to the limit of proportionality: F = kx, where k is the spring constant. Beyond the elastic limit, the spring is permanently deformed. On a force–extension graph, the area under the curve represents work done. The turning effect of a force is called its moment: moment = force × perpendicular distance from pivot. For an object in equilibrium, the sum of clockwise moments equals the sum of anticlockwise moments. Pressure P is force per unit area: P = F / A. The unit is pascal (Pa), where 1 Pa = 1 N m⁻². Pressure in liquids increases with depth: Δp = ρgΔh.
力可以改变物体的形状。胡克定律指出，在比例极限内，弹簧的伸长量 x 与施加的外力 F 成正比：F = kx，其中 k 为弹簧常数。超过弹性极限后弹簧发生永久变形。力–伸长图下方的面积代表做功。力的转动效果叫做力矩：力矩 = 力 × 到支点的垂直距离。物体平衡时，顺时针力矩之和等于逆时针力矩之和。压强 P 是单位面积上的力：P = F / A。单位是帕斯卡（Pa），1 Pa = 1 N m⁻²。液体压强随深度增加：Δp = ρgΔh。
7. Energy, Work and Power | 能量、功与功率
Energy is the capacity to do work and is measured in joules (J). The principle of conservation of energy states that energy cannot be created or destroyed, only transferred or transformed. Work done W is energy transferred when a force moves an object: W = Fd (when force and displacement are parallel). Kinetic energy KE = ½mv². Gravitational potential energy GPE = mgh. Power P is the rate of doing work: P = W / t. Efficiency is the ratio of useful output energy to total input energy, expressed as a percentage. Renewable and non-renewable energy resources – solar, wind, fossil fuels, nuclear – are compared in terms of reliability, environmental impact and cost.
能量是做功的本领，以焦耳（J）为单位。能量守恒定律指出，能量不能创生也不能消灭，只能传递或转化。做功 W 是力使物体移动时传递的能量：W = Fd（力与位移平行时）。动能 KE = ½mv²。重力势能 GPE = mgh。功率 P 是做功的速率：P = W / t。效率是有用输出能量与总输入能量之比，通常用百分数表示。可再生能源和不可再生能源——太阳能、风能、化石燃料、核能——需从可靠性、环境影响和成本等方面比较。
8. Thermal Physics: Kinetic Theory and Heat Transfer | 热物理学：分子运动论与传热
Matter is composed of particles in constant random motion. In solids, particles vibrate about fixed positions; in liquids, they slide past one another; in gases, they move rapidly and freely. The kinetic theory explains properties such as expansion, pressure and Brownian motion. Temperature is a measure of the average kinetic energy of particles. Absolute zero (0 K) is –273 °C, the temperature at which particle kinetic energy is minimum. The gas laws relating pressure, volume and temperature (pV = constant for a fixed mass at constant temperature, and p/T = constant at constant volume) are introduced qualitatively in Year 10. Thermal energy can be transferred by conduction (mainly solids), convection (fluids) and radiation (electromagnetic waves, no medium needed). Good conductors, such as copper, and insulators, such as air, have distinct applications.
物质由不断做无规则运动的粒子构成。固体中粒子在固定位置附近振动；液体中粒子相互滑动；气体中粒子快速自由运动。分子运动论解释了膨胀、压强和布朗运动等现象。温度是粒子平均动能的量度。绝对零度（0 K）即 –273 °C，是粒子动能最低的温度。气体定律（恒温下质量一定的气体 pV = 常数，恒定体积下 p/T = 常数）在 Year 10 做定性介绍。热能可通过传导（主要是固体）、对流（流体）和辐射（电磁波，无需介质）传递。像铜这样的良导体和像空气这样的绝缘体有着不同的应用。
9. Wave Properties and Behaviour | 波的性质与行为
Waves transfer energy without transferring matter. Transverse waves, such as light and water ripples, have oscillations perpendicular to the direction of energy transfer. Longitudinal waves, such as sound, have oscillations parallel to the direction of travel. Key terms include amplitude, wavelength λ, frequency f, period T, and wave speed v. The wave equation is v = f λ. Reflection, refraction, and diffraction are three main wave behaviours. All waves can be reflected; refraction occurs when a wave changes speed at a boundary, causing a change in direction; diffraction is the spreading of a wave around an obstacle or through a gap. The amount of diffraction is greatest when the gap width is comparable to the wavelength. The electromagnetic spectrum, from radio waves to gamma rays, is arranged by wavelength and frequency, with all waves travelling at 3.0 × 10⁸ m s⁻¹ in a vacuum.
波传递能量而不传递物质。横波（如光和水波）的振动方向与能量传递方向垂直。纵波（如声波）的振动方向与传播方向平行。关键术语包括振幅、波长 λ、频率 f、周期 T 和波速 v。波动方程为 v = f λ。反射、折射和衍射是波的三种主要行为。所有波都能反射；当波在界面处改变速度时会折射，导致方向改变；衍射是波绕过障碍物或穿过缝隙的扩散现象。当缝隙宽度与波长相近时，衍射最明显。电磁波谱从无线电波到伽马射线，按波长和频率排列，所有电磁波在真空中速度均为 3.0 × 10⁸ m s⁻¹。
10. Light: Reflection, Refraction and Lenses | 光：反射、折射与透镜
Light travels in straight lines in a uniform medium. The law of reflection states that the angle of incidence equals the angle of reflection, both measured from the normal. Plane mirrors produce virtual, laterally inverted images. Refraction is governed by Snell’s law: n = sin i / sin r, where n is the refractive index, i is the angle of incidence, and r is the angle of refraction. When light enters a denser medium, it bends towards the normal. Total internal reflection occurs when the angle of incidence is greater than the critical angle c, where sin c = 1 / n. Converging lenses (convex) focus parallel rays to a principal focus. The lens formula 1/f = 1/u + 1/v and magnification m = v / u are applied to locate images. Real images can be projected on a screen; virtual images cannot.
光在均匀介质中沿直线传播。反射定律指出，入射角等于反射角，两者均从法线量起。平面镜生成正立、左右相反的虚像。折射遵循斯涅尔定律：n = sin i / sin r，其中 n 为折射率，i 为入射角，r 为折射角。光进入光密介质时向法线偏折。当入射角大于临界角 c 时发生全内反射，满足 sin c = 1 / n。会聚透镜（凸透镜）将平行光线会聚到主焦点。透镜公式 1/f = 1/u + 1/v 及放大率 m = v / u 用于确定像的位置。实像可投射在屏幕上，虚像则不能。
11. Electricity: Current, Voltage and Resistance | 电学：电流、电压和电阻
Electric current is the rate of flow of charge: I = Q / t, measured in amperes (A). For a current to flow, a complete circuit and a source of potential difference (p.d.) are needed. P.d. (voltage) is the energy transferred per unit charge: V = W / Q. Resistance R is defined by R = V / I, with unit ohm (Ω). Ohm’s law states that for a metallic conductor at constant temperature, the current is directly proportional to the p.d. Series circuits have the same current throughout; the total resistance Rtotal = R₁ + R₂ + …. In parallel circuits, the p.d. across each branch is the same, and total resistance decreases with more branches. Electrical power P = IV and energy transferred E = IVt. Safe use of electricity includes understanding fuses, earthing, and circuit breakers.
电流是电荷流动的速率：I = Q / t，单位安培（A）。形成电流需要完整的回路和电势差（电压）源。电势差（电压）是单位电荷转移的能量：V = W / Q。电阻 R 定义为 R = V / I，单位欧姆（Ω）。欧姆定律指出，对于恒温下的金属导体，电流与电压成正比。串联电路中各点电流相等；总电阻 Rtotal = R₁ + R₂ + …。并联电路中各支路电压相同，总电阻随支路增加而减小。电功率 P = IV，电能 E = IVt。安全用电包括理解保险丝、接地和断路器的原理。
12. Simple Magnetism and Electromagnetism | 简单磁学与电磁学
Magnets have north and south poles; like poles repel, unlike poles attract. Permanent magnets (steel) retain their magnetism, while temporary magnets (soft iron) lose it easily. A magnetic field is a region where magnetic forces act, represented by field lines from N to S. The Earth behaves like a giant magnet, which helps navigation using a compass. An electric current in a wire produces a magnetic field – this is electromagnetism. Increasing the current or coiling the wire into a solenoid strengthens the field, especially if a soft iron core is inserted to make an electromagnet. The motor effect refers to a force experienced by a current-carrying conductor in a magnetic field, described by Fleming’s left-hand rule. This principle is used in dc motors. Electromagnetic induction – the generation of a p.d. when a conductor cuts magnetic field lines – is introduced in Year 10 and underpins generators and transformers.
磁体有北极和南极；同名磁极相斥，异名磁极相吸。永磁体（钢）能长久保持磁性，临时磁体（软铁）容易失磁。磁场是磁力作用的区域，用从 N 到 S 的磁感线表示。地球如同一个巨大的磁体，可用于指南针导航。导线中的电流产生磁场——这就是电磁学。增大电流或将导线绕成螺线管可增强磁场，若插入软铁芯制成电磁铁，效果更强。电动机效应是指通电导体在磁场中受力，用弗莱明左手定则描述。该原理用于直流电动机。电磁感应——导体切割磁感线时产生电势差——在 Year 10 引入，是发电机和变压器的基础。
Published by TutorHao | Physics Revision Series | aleveler.com
更多咨询请联系16621398022（同微信）
屏轩国际教育cambridge primary/secondary checkpoint, cat4, ukiset,ukcat,igcse,alevel,PAT,STEP,MAT, ibdp,ap,ssat,sat,sat2课程辅导，国外大学本科硕士研究生博士课程论文辅导