📚 Summer Bridge to Year 7 Edexcel Physics | 暑期预习与衔接：Edexcel七年级物理过渡课程
Welcome to your summer bridge programme for Year 7 Edexcel Physics! This article will help you understand what to expect, introduce key topics, and provide practical activities to make your transition from primary science smooth and enjoyable.
欢迎加入七年级Edexcel物理的暑期衔接课程！本文将帮助你了解即将学习的内容，介绍核心主题，并提供实践活动，让你从小学科学平稳、愉快地过渡到中学物理。
1. Welcome to Year 7 Physics | 欢迎来到七年级物理
Year 7 marks the start of an exciting journey into Physics as a distinct subject within Science. You will begin to explore how the universe works, from tiny particles to enormous forces, using experiments and reasoning.
七年级标志着在科学学科中，物理作为一门独立学科开启激动人心的旅程。你将开始通过实验和推理，探索从微小粒子到宏大力量的宇宙运行规律。
In primary school, you learned about basic scientific ideas such as floating, sinking, and shadows. Now, you will build on those foundations with more precise measurements, formal terminology, and the scientific method. Physics in Year 7 is about curiosity, observation, and asking “why”.
在小学，你接触了浮沉、影子等基础科学概念。现在，你将借助更精确的测量、规范的术语和科学方法，加深对这些知识的理解。七年级物理的核心是好奇心、观察力和多问“为什么”。
2. Why Study Physics? | 为何学习物理？
Physics helps us answer fundamental questions: Why do objects fall to the ground? How does electricity light up a bulb? What is sound made of? By studying physics, you develop analytical thinking, problem-solving skills, and a logical approach to understanding the world.
物理帮助我们解答根本性问题：物体为什么会落向地面？电如何点亮灯泡？声音是由什么构成的？学习物理能培养你的分析思维、问题解决能力和理解世界的逻辑方法。
Physics also links closely with technology, engineering, and even sports. Whether you are designing a faster bicycle, understanding how your mobile phone works, or launching a model rocket, the principles of physics are at play. Year 7 will give you the tools to see everyday phenomena through a scientific lens.
物理还与技术、工程甚至体育运动密切相关。无论是设计更快的自行车、理解手机的工作原理，还是发射模型火箭，物理原理都在发挥作用。七年级将为你提供用科学眼光看待日常现象的工具。
3. Year 7 Edexcel Physics at a Glance | Edexcel七年级物理大纲一览
The Edexcel Year 7 physics curriculum is designed to build a solid foundation. The key topics are woven into broader science themes, and you will learn through hands-on investigations. Below is a summary of the main areas you will cover.
Edexcel七年级物理课程旨在打下坚实的基础。核心主题融入更广泛的科学课题中，你将通过动手探究进行学习。以下是你要学习的主要领域一览。
| Forces and Motion 力与运动 |
Energy 能量 |
| Electricity and Circuits 电与电路 |
Waves: Light and Sound 波：光与声 |
| Matter and the Particle Model 物质与粒子模型 |
Space Physics 空间物理 |
Each topic includes practical experiments and data analysis. You will also develop ‘Working Scientifically’ skills such as planning investigations, recording results, and evaluating evidence. These skills are just as important as the content itself.
每个主题都包含实践实验和数据分析。你还将培养“科学实践”技能，例如设计探究、记录结果和评估证据。这些技能与知识内容同等重要。
4. Developing Scientific Enquiry Skills | 培养科学探究能力
Before diving into the topics, you need to understand how scientists work. In Year 7, you will learn to write a hypothesis, identify variables, and carry out fair tests. These skills are part of ‘Working Scientifically’ and appear in every lesson.
在深入各主题之前，你需要了解科学家是如何工作的。七年级物理中，你将学习撰写假设、识别变量并进行公平测试。这些属于“科学实践”技能，在每个课堂中都会练习。
You will use equipment such as rulers, stopwatches, Newton meters, and ammeters. Recording data in tables and drawing graphs are essential. For example, when investigating how the length of a pendulum affects its period, you’ll collect precise measurements and look for patterns.
你将使用直尺、秒表、牛顿计和电流表等器材。用表格记录数据并绘制图像至关重要。例如，在研究单摆长度如何影响周期时，你会收集精确数据并寻找规律。
Remember, physics is not just about getting the right answer—it is about understanding why the answer is right. Always ask yourself: “What could we change to improve our experiment next time?”
请记住，物理不仅是得到正确答案，更是理解答案为什么正确。要常常问自己：“下次实验我们可以改进什么？”
5. Forces and Motion | 力与运动
A force is a push or a pull that can change the speed, direction, or shape of an object. Forces are measured in newtons (N) using a Newton meter. Contact forces, such as friction, occur when objects touch. Non-contact forces, like gravity and magnetism, act over a distance.
力是能改变物体速度、方向或形状的推或拉。力的单位是牛顿（N），用牛顿计测量。接触力（如摩擦力）在物体接触时产生；非接触力（如重力和磁力）则可隔空作用。
Gravity is the force that pulls objects towards the centre of the Earth. Your weight is the force due to gravity acting on your mass. On Earth, the gravitational field strength is about 10 N/kg, so a 50 kg person weighs approximately 500 N. We use the equation:
重力是将物体拉向地心的力。你的体重就是地球引力作用于你质量上的力。在地球上，重力场强度约为10 N/kg，因此一个50 kg的人体重约为500 N。我们使用公式：
weight (N) = mass (kg) × gravitational field strength (N/kg)
重量 (N) = 质量 (kg) × 重力场强度 (N/kg)
Friction is a force that opposes motion. It can be useful (e.g., between shoes and ground) or a problem (e.g., inside engines). Air resistance and water resistance are types of friction that slow objects moving through fluids.
摩擦力是阻碍运动的力。它可能有用（如鞋底与地面之间），也可能带来麻烦（如引擎内部）。空气阻力和水阻力都是摩擦力的一种，会减慢物体在流体中的运动。
Speed describes how quickly an object moves. In Year 7, you will calculate average speed using:
速度描述物体运动的快慢。七年级中，你将用以下公式计算平均速度：
average speed (m/s) = distance travelled (m) ÷ time taken (s)
平均速度 (m/s) = 运动距离 (m) ÷ 所用时间 (s)
Distance-time graphs will help you visualise motion. A horizontal line means the object is stationary; a straight sloping line means constant speed; a steeper slope means a higher speed.
距离-时间图帮助你直观理解运动。水平线表示物体静止；斜直线表示匀速运动；斜率越大，速度越快。
6. Energy: Forms and Transfers | 能量：形式与转移
Energy is the ability to do work. It is measured in joules (J). Energy exists in many forms: kinetic (movement), thermal (heat), light, sound, electrical, elastic potential, gravitational potential, and chemical. You cannot see energy, but you can observe its effects.
能量是做功的能力，单位是焦耳（J）。能量有多种形式：动能（运动）、热能、光能、声能、电能、弹性势能、重力势能和化学能。你看不到能量，但能观察到它的作用。
A central idea is that energy can be transferred from one store to another, but it is never created or destroyed. This is the principle of conservation of energy. For example, when you switch on a lamp, electrical energy is transferred into light and thermal energy.
核心概念是能量可以从一种储存形式转移到另一种，但不会凭空产生或消失，这就是能量守恒原理。例如，打开一盏灯时，电能转化为光能和热能。
In every energy transfer, some energy is dissipated (spread out) as thermal energy, making it less useful. Understanding energy transfers helps us design more efficient devices, from light bulbs to cars. Diagrams like Sankey diagrams show how energy is shared among useful outputs and waste.
在每次能量转移中，部分能量会以热能的形式散失，变得不那么有用。理解能量转移有助于设计更高效的设备，从灯泡到汽车。像桑基图这样的图表能展示能量如何在有用输出和浪费部分之间分配。
In Year 7 practicals, you might measure the temperature change in water heated by different fuels or investigate how the height of a ramp affects the speed of a toy car, linking gravitational potential energy to kinetic energy.
在七年级实验中，你可能测量不同燃料加热水时的温度变化，或研究斜面高度如何影响玩具车的速度，从而将重力势能与动能联系起来。
7. Electricity and Circuits | 电与电路
Electricity is the flow of tiny particles called electrons around a circuit. For a circuit to work, it must be complete and closed. The basic components you will use include batteries (cells), wires, bulbs, switches, buzzers, and motors.
电是称为电子的微小粒子在电路中的流动。电路必须是完整且闭合的才能工作。你将使用的基本元件包括电池、导线、灯泡、开关、蜂鸣器和电动机。
Current is the flow of electric charge and is measured in amperes (A) using an ammeter connected in series. In a series circuit, the current is the same everywhere. Voltage (potential difference), measured in volts (V) with a voltmeter connected in parallel, provides the “push” that drives the current around the circuit.
电流是电荷的流动，单位为安培（A），用串联的电流表测量。在串联电路中，各处电流相等。电压（电势差）单位为伏特（V），用并联的电压表测量，它提供了推动电流绕行的“推力”。
You will learn to draw circuit diagrams using standard symbols. A simple series circuit with one bulb has only one path for the current. If one component breaks, the whole circuit stops. Adding more bulbs in series makes them dimmer because they share the voltage.
你将学会使用标准符号画电路图。只含一个灯泡的简单串联电路只有一条电流路径；若一个元件断开，整个电路就停止工作。在串联电路中增加更多灯泡会使它们变暗，因为电压被分摊了。
Conductors allow electricity to flow easily (e.g., metals like copper), while insulators prevent flow (e.g., plastic, rubber). Safety is critical: never experiment with mains electricity, and always switch off before changing components.
导体容易让电流通过（如铜等金属），而绝缘体阻止电流通过（如塑料、橡胶）。安全至关重要：绝不使用市电做实验，更换元件前务必断开电源。
8. Waves: Light and Sound | 波：光与声
Light and sound are both waves, but they behave differently. Light travels in straight lines and can travel through a vacuum (like space), while sound requires a medium (solid, liquid, or gas) and travels as vibrations.
光和声都是波，但行为不同。光沿直线传播，能在真空中行进（如太空），而声音需要介质（固体、液体或气体），并以振动形式传播。
When light hits a surface, it can be reflected. The law of reflection states that the angle of incidence equals the angle of reflection. You will use ray boxes and mirrors to investigate how light reflects off smooth surfaces, producing a clear image.
光遇到表面时会发生反射。反射定律指出，入射角等于反射角。你将使用光线盒和镜子研究光如何从光滑表面反射并形成清晰的像。
Refraction occurs when light passes from one transparent material to another (e.g., air to glass), changing speed and bending. This is why a pencil looks bent in a glass of water. White light splits into a spectrum of colours (red, orange, yellow, green, blue, indigo, violet) when passing through a prism—a process called dispersion.
当光从一种透明介质进入另一种（如空气进入玻璃）时，会发生折射，速度改变并产生弯曲。这就是铅笔在水中看起来弯折的原因。白光通过三棱镜会分解成七色彩虹（红橙黄绿蓝靛紫），这叫做色散。
Sound is produced by vibrating objects. The pitch of a sound depends on the frequency of vibration: higher frequency gives a higher pitch. Loudness depends on the amplitude. You will explore sound waves using tuning forks and musical instruments, and learn that sound travels fastest through solids and slowest through gases.
声音由物体振动产生。音调的高低取决于振动频率：频率越高，音调越高。响度取决于振幅。你将使用音叉和乐器探索声波，并了解到声音在固体中传播最快，在气体中最慢。
9. The Particle Model of Matter | 物质的粒子模型
Everything around you is made of matter. The particle model helps explain the properties of solids, liquids, and gases by imagining all substances as tiny, moving particles. These particles are far too small to see, even with a microscope.
你周围的一切都由物质构成。粒子模型通过把物质想象成微小、运动的粒子，解释了固体、液体和气体的性质。这些粒子极其微小，即使用显微镜也看不见。
In a solid, particles are packed closely in a fixed arrangement; they vibrate but cannot move from place to place. This gives solids a fixed shape and volume. In a liquid, particles are close together but can move past each other, so liquids have a fixed volume but take the shape of their container. In a gas, particles are far apart and move rapidly in all directions; gases have no fixed shape or volume.
在固体中，粒子紧密排列在固定位置上，它们只在原位振动，无法移动，因此固体有固定的形状和体积。在液体中，粒子间距较小但能相对滑动，因此液体有固定体积但形状随容器而变。在气体中，粒子相距很远并快速向各个方向运动，气体没有固定的形状和体积。
Changes of state—melting, freezing, boiling, condensing, sublimation—can be explained by adding or removing energy. When a solid is heated, its particles gain energy and vibrate more until they break free from their fixed positions, becoming a liquid. When a liquid is heated further, particles escape to become a gas.
物态变化——熔化、凝固、沸腾、凝结、升华——可以通过能量的增加或减少来解释。固体受热时，粒子获得能量，振动加剧，直至挣脱固定位置变成液体；液体继续受热，粒子逸出变成气体。
Diffusion is the movement of particles from an area of high concentration to an area of low concentration. You can observe this by placing a drop of food colouring in water. The particle model also explains gas pressure: particles colliding with the container walls create pressure.
扩散是粒子从高浓度区域向低浓度区域移动的现象。你可以通过在水中滴入食用色素来观察。粒子模型还解释了气体压强：粒子撞击容器壁就产生了压强。
10. Bridging Activities for Summer | 暑期衔接活动
To prepare for Year 7 physics, try these simple, safe investigations at home. They will sharpen your observation skills and give you a head start.
为了准备七年级物理，可以在家尝试这些简单安全的探究活动。它们能锻炼你的观察力，让你占得先机。
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Measure the time it takes to walk, jog, or run 10 metres. Use a stopwatch and calculate your average speed in metres per second (m/s). Record your results in a table.
测量你走、慢跑或快跑10米的时间。使用秒表，计算平均速度（单位 m/s），并把结果记录在表格中。
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Create a simple series circuit using a battery, two wires, and a small light bulb (or LED). Draw the circuit diagram using standard symbols. Try adding a switch.
用一节电池、两根导线和一个小灯泡（或LED）制作简单串联电路。用标准符号画出电路图，再试着加入一个开关。
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Observe shadows at different times of day. Explain why they change direction and length. Link this to the position of the Sun and how light travels in straight lines.
在一天中的不同时间观察影子，解释影子的方向和长度为何变化，并联系太阳位置和光沿直线传播的知识。
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Drop a small piece of paper and a coin from the same height. Which hits the ground first? Investigate how air resistance affects the motion.
从同一高度同时释放一小片纸和一枚硬币，哪一个先落地？研究空气阻力如何影响运动。
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Make a ‘particle dance’ observation: place a drop of food colouring in a glass of cold water and another in warm water. Note how the colour spreads and relate this to diffusion and particle energy.
观察“粒子舞蹈”：在一杯冷水和一杯温水中各滴一滴食用色素，注意颜色扩散的快慢，并联系扩散与粒子能量。
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