📚 Year 7 AQA Physics: A Parent’s Guide to Supporting Learning | Year 7 AQA 物理：家长辅导指南
Welcome to your essential guide for supporting your child through Year 7 AQA Physics. This resource breaks down key KS3 topics into manageable, parent-friendly sections. You will discover simple explanations, everyday examples and practical activities that reinforce learning at home. By understanding what your child is studying, you can provide the encouragement and discussion that makes physics come alive.
欢迎阅读帮助孩子学习七年级 AQA 物理的必备指南。本资源将 KS3 物理的核心主题拆分成家长易于理解的小节。您会发现简单的解释、日常例子以及能在家巩固学习的实践活动。了解孩子正在学习的内容，您就能够给予鼓励和讨论，让物理活起来。
The AQA Key Stage 3 syllabus for Year 7 introduces fundamental concepts that form the building blocks for GCSE. Working together with your child now will boost their confidence, develop scientific thinking and nurture a lasting curiosity about how the universe works.
AQA 七年级教学大纲引入了构成将来 GCSE 基础的重要概念。现在与孩子一起学习将增强他们的信心、培养科学思维，并激发他们对宇宙如何运作的持久好奇心。
1. Why Physics in Year 7 Matters? | 为什么七年级物理很重要？
Year 7 marks the shift from primary general science to subject-specific physics. Your child begins to explore energy, forces, waves, electricity and the particle model in greater depth. A solid grasp of these topics is essential not just for exams but for understanding the world they live in – from why a ball falls to how a microwave heats food.
七年级标志着从小学综合科学到分科物理的转变。您的孩子开始更深入地探索能量、力、波、电和粒子模型。牢固掌握这些主题不仅对考试至关重要，更有助于理解他们生活的世界——从球为什么会落到微波炉如何加热食物。
Research shows that early positive experiences with physics significantly influence future subject choice and career paths. As a parent, you do not need to be an expert; asking curious questions and showing interest in their experiments builds a supportive learning environment. Every chat about why the sky is blue or how a magnet works strengthens neural connections and scientific vocabulary.
研究表明，早期积极的物理经历会显著影响未来的学科选择和职业道路。作为家长，您无需成为专家；提出好奇的问题并对他们的实验表现出兴趣就能营造支持性的学习环境。每一次关于天空为什么是蓝的或磁铁如何工作的闲聊，都会强化神经连接和科学词汇。
Remember, AQA Year 7 Physics emphasises practical investigation and the 'Working Scientifically' skills. Your encouragement when they measure, record and conclude from simple home experiments turns abstract ideas into memorable experiences.
请记住，AQA 七年级物理强调实验探究和“科学工作”技能。当孩子进行测量、记录并根据简单的家庭实验得出结论时，您的鼓励能将抽象概念转化为难忘的体验。
2. Energy Fundamentals | 能量基础
Energy is the ability to do work, and it is measured in joules (J). In Year 7, students learn that energy cannot be created or destroyed – only transferred, stored or dissipated. This conservation principle is the bedrock of all physics. Children are taught to identify energy stores such as kinetic, thermal, chemical, gravitational potential and elastic potential.
能量是做功的能力，以焦耳（J）为单位。七年级学生要学习能量既不能被创造也不能被消灭——只能被转移、储存或耗散。这一守恒原理是整个物理学的基石。孩子们被教导识别诸如动能、热能、化学能、重力势能和弹性势能等能量储存形式。
Everyday examples make this concrete. When you boil a kettle, electrical energy transfers to thermal energy in the water. A child on a swing swaps gravitational potential energy for kinetic energy and back again. Encourage your child to trace energy transfers at home: a battery-powered toy starts with chemical energy, converts to electrical, then to kinetic and sound.
日常例子能让概念具体化。烧开水时，电能转化为水的热能。荡秋千的孩子将重力势能与动能来回转换。鼓励孩子在家追踪能量转移：一个装电池的玩具从化学能开始，转化为电能，再变成动能和声能。
The following table shows the main energy stores your child needs to recognise. Discuss these terms during everyday moments – for example, point out that a stretched rubber band stores elastic potential energy.
下表展示了您孩子需要识别的主要能量储存方式。在日常时刻讨论这些术语——例如，指出拉伸的橡皮筋储存了弹性势能。
| Energy Store (English) | 能量储存（中文） | Quick Example |
|---|---|---|
| Kinetic | 动能 | Moving car |
| Thermal (heat) | 热能 | Hot cup of tea |
| Chemical | 化学能 | Food, battery |
| Gravitational potential | 重力势能 | Book on a shelf |
| Elastic potential | 弹性势能 | Stretched spring |
| Electrostatic | 静电势能 | Charged balloon |
| Magnetic | 磁能 | Two attracting magnets |
| Nuclear | 核能 | Sun’s core |
Later in KS3, your child will use simple energy equations. Although Year 7 work is mostly qualitative, they may encounter the kinetic energy equation when describing moving objects. The formula using usual symbols is shown below.
在 KS3 后续阶段，您的孩子会用到简单的能量公式。虽然七年级的内容主要是定性的，但他们在描述运动物体时可能会接触到动能方程。常用符号表示的公式如下。
Eₖ = ½ m v²
In this formula, Eₖ stands for kinetic energy (J), m is mass (kg) and v is speed (m/s). Remind your child that doubling the speed makes the kinetic energy four times larger, which is why high-speed collisions are so dangerous.
在这个公式中，Eₖ 代表动能（J），m 是质量（kg），v 是速率（m/s）。提醒您的孩子，速率翻倍会使动能增加至原来的四倍，这就是高速碰撞如此危险的原因。
3. Forces and Their Effects | 力及其作用
A force is a push or a pull, measured in newtons (N). Forces can be contact forces, such as friction, air resistance and tension, or non-contact forces, such as gravity, magnetism and electrostatic force. Your child needs to distinguish between these types and describe how forces affect objects.
力是一种推或拉，单位是牛顿（N）。力可以是接触力，例如摩擦力、空气阻力和拉力，也可以是非接触力，例如重力、磁力和静电力。您的孩子需要区分这些类型并描述力如何影响物体。
When forces act on an object, they can change its shape, speed or direction. A stationary object will only start moving if the resultant force is not zero. If forces are balanced, the object stays at rest or continues at a constant speed. Unbalanced forces cause acceleration, deceleration or change of direction.
力作用在物体上时，可以改变它的形状、速度或方向。静止的物体只有在合力不为零时才会开始运动。如果力平衡，物体会保持静止或匀速运动。不平衡的力会导致加速、减速或方向改变。
Use simple arrows to show forces. Lengths of arrows represent the magnitude, and direction shows the way the force acts. At home, you can sketch force diagrams on paper together: a book on a table has weight pulling down and a normal contact force pushing up. If you slide the book, friction opposes the motion.
用简单的箭头表示力。箭头的长度表示大小，方向表示力的作用方向。在家时，您可以和孩子一起在纸上画力的示意图：桌上的书受到向下的重力和向上的支持力。如果推书，摩擦力会与运动方向相反。
Measuring forces with a spring balance or an elastic band offers a hands-on way to explore Hooke's law informally. Ask your child to predict what happens when they stretch a spring further – does the force increase linearly? Such predictions build investigative skills.
用弹簧秤或橡皮筋测量力，可以非正式地探索胡克定律。让孩子预测进一步拉伸弹簧时会发生什么——力是否呈线性增加？这样的预测能锻炼探究技能。
4. Describing Motion | 描述运动
Motion is described using speed, distance and time. Year 7 students learn to calculate average speed and interpret simple distance–time graphs. Understanding relative motion also helps them see why a train passenger may appear stationary to someone on board but moving to an observer outside.
运动用速率、距离和时间来描述。七年级学生学会计算平均速率并解读简单的距离—时间图像。理解相对运动还能帮助他们明白，为什么火车上的一名乘客在同行者看来是静止的，而车外的观察者却看到他在运动。
The average speed equation is at the heart of early kinematics. Get your child to measure the time it takes to walk 10 metres and then use the formula. It turns maths into physical experience.
平均速率公式是早期运动学的核心。让孩子测量步行 10 米所需的时间，然后套用公式。这样能把数学变成身体体验。
average speed = distance travelled ÷ time taken
Or in symbols: v = d ÷ t, where v is speed in metres per second (m/s), d is distance in metres (m) and t is time in seconds (s). Remind your child to keep units consistent; if distance is in kilometres and time in hours, speed will be in km/h.
或者用符号表示：v = d ÷ t，其中 v 是速率（米/秒），d 是距离（米），t 是时间（秒）。提醒孩子要保持单位一致；如果距离是千米、时间是小时，速率单位就是千米/小时。
Distance–time graphs are visual stories of motion. A straight horizontal line means the object is stationary. A straight diagonal line shows constant speed, and a steeper slope means a higher speed. Curved lines indicate changing speed. Practise sketching these graphs for a toy car or a family walk.
距离—时间图像是运动的视觉故事。一条水平直线表示物体静止。一条斜线表示匀速运动，斜率越陡，速率越大。曲线则表明速率在变化。可以练习为玩具汽车或家庭散步绘制这些图像。
5. Waves: Sound and Light | 波：声与光
Waves transfer energy without transferring matter. In Year 7, students compare sound waves (which are longitudinal vibrations needing a medium) with light waves (transverse electromagnetic waves that can travel through a vacuum). This distinction underpins much of GCSE physics.
波传递能量而不传递物质。在七年级，学生比较声波（需要介质的纵振动）和光波（能在真空中传播的横电磁波）。这一区别是 GCSE 物理的重要基础。
Sound is produced by vibrating objects. The vibrations travel through solids, liquids and gases as a series of compressions and rarefactions. The speed of sound in air is about 340 m/s, much slower than light. That is why you see lightning before you hear thunder. Simple demonstrations with a tuning fork and water can show sound vibrations visibly.
声音由振动物体产生。振动以一系列压缩与稀疏的形式通过固体、液体和气体传播。空气中声速约为 340 m/s，比光慢得多。这就是为什么你先看到闪电后听到雷声。用音叉和水进行简单演示可以直观地展示声振动。
Light travels in straight lines at the incredible speed of 300 000 km/s in a vacuum. Students explore how shadows form, how light reflects off mirrors and how it bends (refracts) when entering glass or water. The law of reflection – angle of incidence equals angle of reflection – can be investigated at home with a torch and a mirror.
光在真空中以 300 000 km/s 的惊人速度沿直线传播。学生探索影子如何形成、光如何被镜面反射，以及光进入玻璃或水中时如何弯曲（折射）。反射定律——入射角等于反射角——可以用手电筒和镜子在家进行探究。
Understanding the human ear and eye ties waves to biology. The ear converts sound vibrations into electrical signals; the eye focuses light onto the retina. Encourage your child to label diagrams and explain how each part functions – this reinforces cross-disciplinary links.
理解人耳和人眼将波与生物学联系起来
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