📚 Year 7 Cambridge Physics: Complete Syllabus Breakdown | Year 7 Cambridge 物理：课程大纲全面解析
Welcome to a clear, topic-by-topic guide to the Year 7 (Stage 7) Cambridge Lower Secondary Physics curriculum. This article breaks down every major area you will study, explains the key ideas in simple terms, and shows how each topic connects to real-world science. Whether you are starting the course or preparing for a progress test, this detailed overview will help you stay on track.
欢迎阅读这份 Year 7（Stage 7）Cambridge 初中物理课程的主题式清晰指南。本文将拆解你将学习的主要知识领域，用简单的语言解释核心概念，并展示每个主题与现实世界的联系。无论你是刚开始学习这门课，还是正为阶段性测验做准备，这份全面解析都能帮助你稳步前行。
1. The Cambridge Lower Secondary Physics Framework | Cambridge 初中物理课程框架
The Cambridge Lower Secondary Science curriculum is built around three strands: Biology, Chemistry, and Physics. In Stage 7 Physics, you will encounter six core topic areas that are designed to build a solid foundation for IGCSE studies. The syllabus places equal emphasis on content knowledge and scientific enquiry skills, meaning you will not only learn physics facts but also how to think and work like a scientist.
Cambridge 初中科学课程围绕生物、化学和物理三个分支构建。在 Stage 7 物理中，你将接触六个核心主题领域，这些内容旨在为 IGCSE 学习奠定坚实基础。课程大纲同样重视学科内容与科学探究技能，这意味着你不仅要学习物理知识，还要学会像科学家一样思考和工作。
Throughout the year, you will plan investigations, collect data, interpret graphs, and evaluate experimental methods. These skills are woven into every physics topic. The framework encourages you to ask questions, make predictions, and draw conclusions based on evidence—habits that are essential for any future scientist or engineer.
在整个学年中，你将设计探究方案、收集数据、解读图表并评估实验方法。这些技能蕴含在每一个物理主题中。课程框架鼓励你提出问题、作出预测，并基于证据得出结论——这些习惯对任何未来的科学家或工程师都至关重要。
2. Forces and Motion | 力与运动
Forces are pushes or pulls that can change the speed, direction, or shape of an object. In Year 7, you learn to identify different types of forces, such as gravity, friction, and air resistance, and to represent them using force arrows in diagrams. A key idea is that forces are measured in newtons (N) and often come in pairs.
力是能改变物体速度、方向或形状的推或拉。在 Year 7，你要学会识别不同类型的力，如重力、摩擦力和空气阻力，并用带箭头的力示意图来表示它们。一个关键概念是，力以牛顿（N）为单位计量，且常常成对出现。
You also explore balanced and unbalanced forces. When forces on an object are balanced, it stays at rest or moves at a steady speed. When unbalanced, the object accelerates, decelerates, or changes direction. This is the idea behind Newton’s First Law, introduced simply at this stage. Practical work might involve measuring the force needed to pull a block across different surfaces or timing a toy car rolling down a ramp.
你还会探索平衡力与非平衡力。当物体上的力平衡时，它将保持静止或匀速运动。当力不平衡时，物体会加速、减速或改变方向。这正是牛顿第一定律的基本思想，在本阶段进行简单介绍。实践活动可能包括测量拉着木块在不同表面上移动所需的力，或记录玩具车从斜面滚下的时间。
The concept of speed is introduced with the formula speed = distance ÷ time, though you may only use it qualitatively at first. Gravity is discussed as a force that pulls objects toward the centre of the Earth, giving them weight. Distinguishing between mass (measured in kilograms) and weight (a force, in newtons) is an important early lesson.
速度的概念通过公式 速度 = 距离 ÷ 时间 引入，不过起初你可能只进行定性运用。重力被描述为将物体拉向地球中心的力，它赋予物体重量。区分质量（以千克计）和重量（一种力，以牛顿计）是早期的重要一课。
3. Energy | 能量
Energy is a central theme that reappears throughout the physics course. In Stage 7, you learn that energy is the ability to do work and that it can exist in different stores, such as kinetic, thermal, chemical, gravitational potential, and elastic potential. Energy can be transferred from one store to another, but the total amount remains constant—this is the principle of conservation of energy.
能量是一个贯穿物理课程的核心主题。在 Stage 7，你将学到能量是做功的能力，并且它可以存在于不同的“仓库”中，例如动能、热能、化学能、重力势能和弹性势能。能量可以从一个仓库转移到另一个仓库，但总量保持不变——这就是能量守恒原理。
Common energy transfers are explored using everyday examples: a ball thrown upward exchanges kinetic energy for gravitational potential energy; a burning candle transfers chemical energy to thermal and light energy. You will draw simple energy flow diagrams (Sankey diagrams at a basic level) to visualise these transfers. The syllabus encourages you to identify energy stores before and after a change, which helps develop systematic thinking.
课程通过日常例子探索常见的能量转移：向上抛出的球将动能转化为重力势能；燃烧的蜡烛将化学能转化为热能和光能。你将绘制简单的能量流动图（基础的桑基图）来可视化这些转移。课程大纲鼓励你识别变化前后的能量储存，这有助于培养系统性思维。
Renewable and non‑renewable energy resources are also introduced. You will compare fossil fuels, nuclear power, solar, wind, and hydroelectric energy in terms of their advantages and environmental impacts. This topic connects strongly with real‑world issues, such as climate change and sustainable development.
可再生与不可再生能源资源也被引入。你将比较化石燃料、核能、太阳能、风能和水力发电，从优势和环境影响方面展开讨论。这一主题与现实世界的议题紧密相连，如气候变化和可持续发展。
4. Light | 光
Light travels in straight lines at a tremendous speed of about 300 000 km/s in a vacuum. Year 7 students investigate how shadows form, why lunar eclipses occur, and how light reflects from smooth surfaces. The law of reflection states that the angle of incidence equals the angle of reflection, and this is often demonstrated using a ray box and a plane mirror.
光沿直线传播，在真空中的速度约为每秒 300 000 公里。Year 7 学生将探究影子如何形成、月食为何发生，以及光如何从光滑表面反射。反射定律指出，入射角等于反射角，常使用光线盒和平面镜进行演示。
You also learn about refraction—the bending of light as it passes from one transparent medium to another, such as from air to glass or water. A classic experiment involves placing a pencil in a glass of water and observing how it appears broken at the surface. The dispersion of white light into the colours of the spectrum (red, orange, yellow, green, blue, indigo, violet) using a prism is a highlight of this topic, linking to the formation of rainbows.
你还会学习折射——光从一种透明介质进入另一种（如从空气到玻璃或水）时发生的弯曲现象。一个经典实验是将铅笔放入一杯水中，观察它在水面处看起来像折断了一样。使用棱镜将白光色散成光谱颜色（红、橙、黄、绿、蓝、靛、紫）是这一主题的亮点，与彩虹的形成相联系。
How we see objects is also covered. Objects are visible because they reflect light into our eyes. The eye is briefly introduced as a light detector, with the cornea, lens, and retina mentioned in simple terms. Colour filters and how objects appear coloured under different lights are explored, building early understanding of light and vision.
我们如何看到物体也是课程内容之一。物体之所以可见，是因为它们将光反射到我们的眼睛里。眼睛被简要介绍为光探测器，简单提及角膜、晶状体和视网膜。课程还将探索彩色滤光片以及物体在不同光线下为何呈现颜色，为理解光和视觉打下早期基础。
5. Sound | 声音
Sound is a form of energy produced by vibrating objects. In Stage 7, you learn that sound travels as a longitudinal wave and requires a medium (solid, liquid, or gas) to propagate—it cannot travel through a vacuum. This is often demonstrated by placing a ringing alarm clock inside a sealed jar and removing the air; the sound becomes fainter and eventually inaudible.
声音是由振动物体产生的一种能量形式。在 Stage 7，你将学到声音以纵波的形式传播，并且需要介质（固体、液体或气体）才能传播——它无法在真空中传播。常将响铃的闹钟放在密封罐内，然后抽出空气进行演示；声音逐渐减弱，最终听不见。
ow the pitch of a sound relates to the frequency of vibration (higher frequency = higher pitch) and how loudness corresponds to the amplitude of the wave. Experiments with tuning forks, musical instruments, or online oscilloscope simulations help make these ideas concrete.
声音在空气中的速度约为 340 m/s，比光慢得多。这就解释了为什么你先看到闪电，后听到雷声。你还会探索声音的音调与振动频率的关系（频率越高，音调越高），以及响度如何对应于波幅。使用音叉、乐器或在线示波器模拟的实验有助于将这些概念具体化。
The structure of the human ear is introduced simply: outer ear collects sound, eardrum vibrates, and tiny bones transmit the vibrations to the cochlea, which sends signals to the brain. Hearing loss and ear protection are often discussed to raise awareness of health and safety.
课程还简单介绍了人耳的结构：外耳收集声音，鼓膜振动，小骨将振动传到耳蜗，再由耳蜗向大脑发送信号。通常会讨论听力损伤和耳朵保护，以提高健康与安全意识。
6. Electricity | 电学
Electric circuits form a hands-on topic that many students find exciting. You learn to construct simple series circuits using cells, wires, bulbs, switches, and buzzers. The key concepts are that electricity is a flow of charge (current) and that a complete conducting loop is needed for a circuit to work.
电路是许多学生感到兴奋的实践性主题。你将学习用电池、导线、灯泡、开关和蜂鸣器搭建简单的串联电路。核心概念是：电是电荷的流动（电流），并且电路需要一个完整的导电回路才能工作。
Current is measured in amperes (amps) using an ammeter connected in series, while voltage (potential difference), provided by the cell, is measured in volts with a voltmeter connected in parallel. At this stage, you simply recognise that current is the same everywhere in a series circuit and that the sum of the voltages across components equals the supply voltage. This prepares the ground for more detailed circuit analysis later.
电流以安培（安）为单位，使用串联在电路中的安培计测量；而电池提供的电压（电位差）以伏特为单位，使用并联的伏特计测量。在本阶段，你只需认识到串联电路中各处电流相同，且各元件两端电压之和等于电源电压。这为日后更详细的电路分析奠定了基础。
Conductors and insulators are identified through simple testing. Metals, graphite, and salt solutions are common conductors; plastics, wood, and rubber are insulators. Safety around mains electricity is stressed: never touch exposed wires, and always work with low‑voltage supplies in the lab.
通过简单的测试，你能识别导体和绝缘体。金属、石墨和盐溶液是常见的导体；塑料、木材和橡胶是绝缘体。还会强调接触市电的安全问题：切勿触碰裸露的导线，实验室中始终使用低压电源。
7. Magnetism | 磁学
Magnetism is introduced with permanent magnets and magnetic materials. You learn that a magnet has a north pole and a south pole, and that like poles repel each other while unlike poles attract. The region around a magnet where it exerts a force is called the magnetic field, which can be visualised by sprinkling iron filings around a bar magnet.
磁学通过永磁体和磁性材料引入。你将学到磁铁有北极和南极，同极相斥，异极相吸。磁铁周围施加作用力的区域称为磁场，可以通过在条形磁铁周围撒铁屑来可视化。
The Earth’s magnetic field is compared to that of a giant bar magnet, which is why a freely suspended magnet aligns north–south and is used in a compass. You will investigate which materials are magnetic (iron, nickel, cobalt) and which are not, and explore how magnetism can be induced temporarily in some objects, such as stroking an iron nail with a magnet.
地球的磁场被比作一块巨大的条形磁铁，这就是为什么自由悬挂的磁铁会指向南北，并用于指南针。你将探究哪些材料具有磁性（铁、镍、钴），哪些没有，并探索如何在一些物体上临时感应出磁性，比如用磁铁沿一个方向摩擦铁钉。
The concept of an electromagnet is a natural extension: a coil of wire carrying an electric current produces a magnetic field. You may construct a simple electromagnet by wrapping insulated wire around an iron nail and connecting it to a cell. The strength can be increased by increasing the current or the number of coils, opening the door to controlled investigations.
电磁铁的概念是这一部分的自然延伸：通电的线圈会产生磁场。你可以通过将绝缘导线缠绕在铁钉上，并连接到电池上来制作一个简单的电磁铁。其强度可通过增大电流或增加线圈匝数来增强，这为受控探究打开了大门。
8. Earth and Space | 地球与太空
This topic places our planet in the context of the wider Solar System. Year 7 students explore the relative positions of the Sun, Earth, and Moon, and how their movements cause day and night, seasons, and lunar phases. The Sun is a star, and the Earth orbits it once every 365¼ days, giving rise to our calendar year and leap years.
这一主题将我们的地球置于更广阔的太阳系背景中。Year 7 学生将探索太阳、地球和月球的相对位置，以及它们的运动如何引起昼夜交替、季节变化和月相变化。太阳是一颗恒星，地球每 365¼ 天绕太阳公转一圈，从而产生了我们的历法年和闰年。
The Moon orbits the Earth roughly every 28 days, and its changing appearance as seen from Earth is explained through simple diagrams of illuminated halves. Solar and lunar eclipses are described using the alignment of the three bodies. The tilt of the Earth’s axis (about 23.5°) is used to explain why the Northern and Southern Hemispheres experience opposite seasons.
月球大约每 28 天绕地球一圈，从地球上看到的月相变化通过简单的亮面示意图加以解释。日食和月食用三个天体的排列关系来描述。地轴约 23.5° 的倾斜被用来解释南北半球为何季节相反。
The Solar System is introduced with the eight planets in order from the Sun: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. You also learn about asteroids, comets, and the role of gravity in holding planets in orbit. This unit often sparks curiosity about space exploration and the scale of the universe.
太阳系通过按距离太阳从近到远的八大行星引入：水星、金星、地球、火星、木星、土星、天王星和海王星。你还会了解小行星、彗星以及引力在维持行星轨道中的作用。这一单元常激发同学们对太空探索和宇宙尺度的好奇。
9. Scientific Enquiry and Practical Skills | 科学探究与实践技能
Physics is an experimental science, and the Cambridge curriculum places a strong emphasis on learning by doing. You will plan investigations, make predictions, choose appropriate equipment, and record measurements with correct units. Understanding variables—independent, dependent, and control—is central to designing fair tests.
物理是一门实验科学，Cambridge 课程非常重视通过动手实践学习。你将设计探究方案、作出预测、选择合适的仪器并用正确单位记录测量结果。理解变量（自变量、因变量和控制变量）是设计公平实验的核心。
Drawing graphs, describing trends, and identifying anomalous results are regular features of practical write‑ups. You will learn to calculate means from repeat readings and to evaluate whether the data supports the original prediction. Safety in the laboratory is taken seriously: you must know the names and uses of common apparatus and follow instructions carefully.
绘制图表、描述趋势和识别异常数据是实验报告的常规内容。你将学习从重复读数中计算平均值，并评估数据是否支持最初的预测。实验室安全得到高度重视：你必须了解常用设备的名称和用途，并仔细遵循操作规程。
10. Connecting Topics and Looking Ahead | 主题间的联系与未来展望
The six content areas in Stage 7 Physics are not isolated; they link together to form a coherent picture of how the physical world works. For example, understanding forces helps explain energy transfers, and knowledge of light and sound waves connects to our senses and everyday technology. Electricity and magnetism come together in the study of electromagnets, foreshadowing the deeper connections explored in IGCSE Physics.
Stage 7 物理的六个内容领域并非孤立存在，它们相互关联，构成了一幅关于物理世界如何运作的连贯图景。例如，理解力有助于解释能量转移，而光和声波的知识又与我们的感官和日常技术联系在一起。电与磁在电磁铁的学习中结合在一起，预示着在 IGCSE 物理中要深入探索的联系。
This syllabus overview also serves as a roadmap for your revision. By keeping these key ideas in mind, you can approach end‑of‑unit tests with greater confidence. Regular practice of scientific enquiry skills—asking questions, planning experiments, analysing results—will make you a more independent and capable learner, ready to tackle the challenges of Stage 8 and beyond.
这份大纲解析也是你复习的路线图。通过记住这些核心概念，你可以更自信地应对单元结束测验。经常练习科学探究技能——提出问题、设计实验、分析结果——将使你成为一个更独立、更有能力的学习者，为迎接 Stage 8 以及更高阶段的挑战做好准备。
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