📚 Year 7 CCEA Physics: A Bridging Guide for Success | Year 7 CCEA 物理：升学衔接指南
Moving from primary science to Year 7 CCEA Physics is an exciting step. You begin to see how the world works through the lens of energy, forces, electricity, and waves. This guide bridges your prior knowledge with the key topics of the CCEA Year 7 Physics curriculum, giving you the tools to build confidence and secure a strong foundation for Year 8 and beyond.
从小学科学升入 Year 7 CCEA 物理是令人激动的一步。你将开始通过能量、力、电和波的视角来看待世界的运行。本指南把你已有的知识与 CCEA Year 7 物理课程的核心主题衔接起来，为你提供工具，建立信心，并为 Year 8 及后续年级打下坚实基础。
1. The Big Picture of Year 7 Physics | Year 7 物理的全貌
In Year 7, physics is introduced as a distinct strand within Key Stage 3 Science under the CCEA specification. You will explore how objects move, what makes things happen, and how energy is transferred. Many topics link directly to everyday experiences, such as seeing light, hearing sounds, and using magnets.
在 Year 7，物理作为 CCEA 制定标准中 Key Stage 3 科学的一个独立分支引入。你将探究物体如何运动，什么因素导致现象发生，以及能量如何传递。许多主题与日常体验直接相关，比如看见光、听到声音和使用磁铁。
2. Forces and Motion: Making Things Move | 力与运动：让物体动起来
Forces are pushes or pulls measured in newtons (N). You will learn to draw force arrows to show direction and size on diagrams. Balanced forces keep an object at rest or moving at constant speed, while unbalanced forces cause a change in speed or shape. Speed is calculated using speed = distance ÷ time, often written as v = d / t.
力是用牛顿 (N) 度量的推或拉。你将学习在图上画力的箭头来表示方向和大小。平衡的力使物体保持静止或匀速运动，而不平衡的力则导致物体速度或形状的改变。速度用公式 速度 = 距离 ÷ 时间 计算，常写为 v = d / t。
3. Energy: Forms and Simple Transfers | 能量：形式与简单转移
Energy is the ability to do work and is measured in joules (J). In Year 7, you identify forms such as kinetic, thermal, light, sound, and strain (elastic). Energy transfer diagrams show how energy moves from one store to another, e.g. a battery turning on a lamp: chemical → electrical → light + thermal.
能量是做功的能力，单位是焦耳 (J)。在 Year 7，你需要识别动能、热能、光能、声能和应变（弹性）能等形式。能量转移图显示能量如何从一个储存库转移到另一个，例如电池点亮灯泡：化学能 → 电能 → 光能 + 热能。
4. Light: Reflection and Seeing | 光：反射与看见
Light travels in straight lines. Reflection explains how we see ourselves in mirrors. The angle of incidence equals the angle of reflection, measured from the normal (an imaginary line perpendicular to the surface). Objects are seen when light from a source reflects off them into our eyes.
光沿直线传播。反射解释了我们如何在镜子中看到自己。入射角等于反射角，均从法线（垂直于表面的假想线）量起。当来自光源的光线从物体反射进入眼睛时，我们才能看见物体。
5. Sound: Vibrations and Waves | 声音：振动与波
Sound is produced by vibrations and travels as longitudinal waves through solids, liquids, and gases. You will explore how changing the amplitude of a vibration affects loudness, and how changing frequency affects pitch. Sound cannot travel through a vacuum, which is a key concept demonstrated with a bell jar experiment.
声音由振动产生，并以纵波形式通过固体、液体和气体传播。你将探究振动幅度如何影响响度，以及频率如何影响音高。声音不能在真空中传播，这是通过钟罩实验演示的一个关键概念。
6. Electricity: Building Simple Circuits | 电：搭建简单电路
You will learn to identify circuit symbols for cells, batteries, bulbs, switches, and buzzers. A complete circuit is needed for current to flow. Current is measured in amperes (A) using an ammeter connected in series. Voltage (potential difference) is measured in volts (V) with a voltmeter connected in parallel.
你将学会识别电池、电池组、灯泡、开关和蜂鸣器的电路符号。要有电流流过必须形成完整回路。电流单位是安培 (A)，用串联的安培表测量。电压（电势差）单位是伏特 (V)，用并联的伏特表测量。
7. Magnetism: Poles and Electromagnets | 磁性：磁极与电磁铁
Magnets have north and south poles: like poles repel, unlike poles attract. Magnetic fields can be mapped with iron filings. An electromagnet is created by wrapping a coil of wire around an iron core and passing a current through it. The strength can be increased by adding more turns to the coil or increasing the current.
磁铁有北极和南极：同极相斥，异极相吸。磁场可用铁粉描绘出来。电磁铁是将线圈绕在铁芯上并通入电流制成的。增加线圈匝数或增大电流都能增强其磁场强度。
8. The Particle Model and States of Matter | 粒子模型与物态
All substances are made of particles. In solids, particles vibrate in fixed positions; in liquids, they move around each other; in gases, they move rapidly in all directions. The particle model helps explain density, pressure, and changes of state such as melting, freezing, and boiling.
所有物质都是由粒子组成的。在固体中，粒子在固定位置振动；在液体中，粒子相互滑动；在气体中，粒子快速向各个方向运动。粒子模型有助于解释密度、压强以及熔化、凝固和沸腾等状态变化。
9. Space and the Solar System | 太空与太阳系
Earth is one of eight planets orbiting the Sun. Gravity keeps planets in orbit and also acts between all masses. You will compare the differences between rocky inner planets and gas giant outer planets, and learn about moons, asteroids, and comets. Day and night are caused by Earth’s rotation on its axis.
地球是绕太阳运行的八大行星之一。万有引力使行星保持在轨道上，并在所有有质量的物体之间起作用。你将比较内圈的岩石行星和外圈的气态巨行星之间的差异，并了解卫星、小行星和彗星。昼夜由地球绕地轴自转引起。
10. Practical Skills: Working Like a Physicist | 实验技能：像物理学家一样工作
From Year 7 onwards, you will develop skills in planning investigations, making predictions, recording measurements, and drawing graphs. Key safety rules include tying back long hair, wearing goggles when heating, and never tasting chemicals. Graph skills are especially important: plotting points accurately and drawing lines of best fit.
从 Year 7 起，你将培养设计探究、做出预测、记录测量和绘制图表等技能。关键的安全守则包括束紧长发、加热时佩戴护目镜以及绝不可品尝化学品。绘图技能尤为重要：精确描点并画出最佳拟合线。
11. Bridging into Year 8: Concepts That Grow | 衔接到 Year 8：不断发展的概念
In Year 8, you will revisit forces by using Hooke’s Law (F = kx) and study pressure in solids and liquids. Energy topics extend to renewable and non‑renewable resources. Electricity moves to series and parallel circuits, investigating resistance. Securing a clear grasp of Year 7 basics makes these advances manageable.
在 Year 8，你将通过胡克定律 (F = kx) 重新探讨力，并学习固体和液体中的压强。能量主题会延伸到可再生和不可再生资源。电学会进入串联和并联电路，研究电阻。扎实掌握 Year 7 的基础知识会让这些进阶内容变得容易掌握。
12. Study Strategies for Long‑term Success | 长期成功的复习策略
Use active recall: after reading a topic, write down everything you remember without looking. Draw concept maps linking key ideas. Practise numeracy, such as rearranging the speed formula v = d / t, or calculating energy in food labels. Form a small study group to explain ideas to each other—teaching a concept is the best way to solidify understanding.
使用主动回忆法：阅读一个主题后，合上书写下你能记住的所有内容。绘制概念图，将关键想法联系起来。练习计算，例如变换速度公式 v = d / t，或计算食品标签上的能量。组成小型学习小组，互相讲解想法——教给别人是巩固理解的最好方式。
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