📚 Year 8 AQA Physics: Ultimate Vocabulary Memorisation Guide | 八年级 AQA 物理终极术语速记指南
Mastering physics begins with a solid grasp of key vocabulary. This guide covers the essential terms from the Year 8 AQA Physics syllabus, pairing each with a clear definition in both English and Chinese. You will also find memorable hooks to make these words stick. Work through each section actively — say the words aloud, draw quick sketches, and test yourself regularly.
掌握物理从牢固掌握关键术语开始。本指南涵盖了八年级 AQA 物理教学大纲中的核心词汇，为每一个术语提供了清晰的中英文双语定义。你还会发现帮助记忆的诀窍。请主动学习每一节 — 大声说出词汇、画出简图，并定期自我检测。
1. Forces and Motion | 力与运动
A force is a push or a pull that acts on an object due to its interaction with another object. All forces are measured in newtons (N).
力是物体与另一物体相互作用时受到的推或拉。所有力的单位都是牛顿（N）。
Contact forces require the objects to be physically touching. Examples include friction, air resistance, tension and the normal contact force.
接触力需要物体实际接触才能产生。例如摩擦力、空气阻力、拉力和支持力。
Non-contact forces act over a distance without the objects touching. Gravity, magnetism and electrostatic attraction are all non-contact forces.
非接触力能够在相隔一定距离的情况下作用，物体之间无需直接接触。引力、磁力和静电力都属于非接触力。
Friction is a contact force that opposes motion between two surfaces sliding past each other. It can be useful (helping you grip) or a nuisance (wearing down parts).
摩擦力是一种阻碍两个接触面相对滑动的接触力。它可能是有用的（帮助你抓握），也可能带来麻烦（磨损部件）。
Weight is the force exerted on an object due to gravity. Weight depends on both the mass of the object and the gravitational field strength.
重量是由于引力作用在物体上的力。重量取决于物体的质量和引力场强度。
Weight (N) = mass (kg) × gravitational field strength (N/kg)
重量 (牛) = 质量 (千克) × 引力场强度 (牛/千克)
Mass tells you how much matter an object contains. It is measured in kilograms (kg) and does not change with location; weight, on the other hand, can vary.
质量表示物体含有物质的多少，单位是千克（kg），不随位置改变；而重量则会变化。
Speed is a measure of how fast something is moving. It is calculated by dividing the distance travelled by the time taken. Speed is a scalar quantity — it has magnitude only.
速度是物体运动快慢的量度。速度可以用经过的距离除以所用的时间来计算。速度是标量，只有大小。
Resultant force is the single force that has the same effect as all the forces acting on an object combined. If the resultant force is zero, the forces are balanced.
合力是作用在物体上所有力的总和等效的单一力。如果合力为零，则力是平衡的。
2. Energy Stores and Transfers | 能量储存与转移
Energy is required to make things happen. It is measured in joules (J) and can be stored in several different ways.
能量是一切事物发生所需的动力，其单位是焦耳（J），可以多种方式储存。
Kinetic energy is the energy stored in moving objects. The faster an object moves and the greater its mass, the more kinetic energy it stores.
动能是储存在运动物体中的能量。物体运动得越快、质量越大，储存的动能越多。
Gravitational potential energy is the energy stored in an object because of its position in a gravitational field. Lifting an object higher increases its gravitational potential energy.
重力势能是物体由于其在引力场中的位置而储存的能量。把物体举得越高，它的重力势能就越大。
Thermal energy is the energy a substance stores because of the movement and arrangement of its particles. The hotter something is, the more thermal energy it holds.
热（内）能是物质由于粒子的运动和排列而储存的能量。物体温度越高，储存的热能就越多。
Energy can be transferred from one store to another. There are four main pathways: by heating, by doing mechanical work (using a force), by electric currents, and by radiation (light or sound).
能量可以从一种储存方式转移到另一种。主要的转移途径有四种：通过加热、通过做机械功（用力）、通过电流以及通过辐射（光或声）。
Conservation of energy states that energy cannot be created or destroyed; it can only be transferred, stored or dissipated. In all changes the total energy remains the same.
能量守恒定律指出，能量既不能被创造也不能被消灭；它只能被转移、储存或耗散。在任何变化中，总能量都保持不变。
Dissipated energy is energy that has spread out into the surroundings, often as thermal energy, and is no longer useful for the intended purpose. Reducing dissipation is a key aim of energy-efficient design.
耗散能量是散失到周围环境中（通常以热能形式）且对原定目的不再有用的能量。减少能量耗散是节能设计的主要目标。
Renewable energy resources — such as solar, wind, wave and tidal power — are replenished by nature and will not run out. Non-renewable resources like coal, oil and gas are finite.
可再生能源 — 如太阳能、风能、波浪能和潮汐能 — 由自然补充，不会枯竭。不可再生资源如煤、石油和天然气是有限的。
3. Electricity and Circuits | 电与电路
An electric current is the flow of electric charge, usually carried by electrons moving through a wire. Current is measured in amperes (A).
电流是电荷的流动，通常由电子在导线中移动形成。电流的单位是安培（A）。
Potential difference (voltage) is the push that drives electric charge around a circuit. It is measured in volts (V).
电势差（电压）是驱动电荷在电路中移动的推力，单位是伏特（V）。
Resistance is the opposition to the flow of current. It is measured in ohms (Ω). The greater the resistance, the smaller the current for a given voltage.
电阻是对电流流动的阻碍，单位是欧姆（Ω）。电阻越大，在一定电压下电流越小。
A series circuit has all components connected in a single loop. If one component breaks, the circuit is broken and current stops everywhere.
串联电路将所有元件连接在单一回路中。如果其中一个元件损坏，电路断开，各处电流都停止。
In a parallel circuit there is more than one path for the current. Each component is connected on its own branch, so if one branch breaks, the others can still work.
在并联电路中，电流有不止一条路径。每个元件连接在自己的支路上，因此如果一支路断开，其他支路仍能工作。
Conductors are materials, like copper, that allow electric current to flow through them easily because they contain free electrons. Insulators, such as plastic, do not.
导体是像铜这样容易让电流通过的材料，因为它们含有自由电子。绝缘体（如塑料）则不允许电流通过。
A circuit diagram uses standard symbols to represent components. Correctly drawing and interpreting these symbols is essential for understanding circuits.
电路图使用标准符号来表示元件。正确绘制和解读这些符号对于理解电路至关重要。
4. Magnetism | 磁学
A magnet is an object that produces a magnetic field around itself. Magnets have two poles: north and south. Like poles repel each other; unlike poles attract.
磁体是能在自身周围产生磁场的物体。磁体有两个磁极：北极和南极。同名磁极相互排斥，异名磁极相互吸引。
A magnetic field is the region around a magnet where its magnetic force can be detected. Magnetic field lines run from the north pole to the south pole outside the magnet.
磁场是磁体周围能检测到磁力的区域。磁感线在磁体外部从北极指向南极。
An electromagnet is a temporary magnet made by passing an electric current through a coil of wire wound around an iron core. Its strength can be increased by adding more turns to the coil or by increasing the current.
电磁铁是一种由通电线圈缠绕铁芯制成的临时磁体。增加线圈匝数或增大电流都可以增强它的磁性。
Permanent magnets produce their own magnetic field all the time. Induced magnets become magnetic only when placed within a magnetic field.
永磁体始终会产生自己的磁场。感应磁体只有在处于磁场中时才具有磁性。
Magnetic materials — such as iron, nickel and cobalt — are attracted to magnets. Iron is magnetically soft, meaning it easily gains and loses magnetism; steel is magnetically hard and retains magnetism longer.
磁性材料 — 如铁、镍和钴 — 会被磁体吸引。铁属于软磁材料，容易获得和失去磁性；钢属于硬磁材料，能更长久地保持磁性。
5. Waves: Sound and Light | 波：声与光
A wave is a disturbance that transfers energy from one place to another without transferring matter. Waves can be mechanical (needing a medium) or electromagnetic (able to travel through a vacuum).
波是一种在不传递物质的情况下将能量从一处传递到另一处的扰动。波可分为机械波（需要介质）和电磁波（能在真空中传播）。
In transverse waves, the oscillations are perpendicular to the direction of energy transfer. Light and all electromagnetic waves are transverse.
在横波中，振动方向与能量传递方向垂直。光以及所有电磁波都是横波。
In longitudinal waves, the oscillations are parallel to the direction of energy transfer. Sound waves are longitudinal.
在纵波中，振动方向与能量传递方向平行。声波是纵波。
The amplitude of a wave is the maximum displacement from the rest position. It relates to the loudness of sound or the brightness of light.
波的振幅是相对于平衡位置的最大位移。振幅与声音的响度或光的亮度有关。
The wavelength is the distance between two successive crests or troughs. Frequency is the number of complete waves passing a point per second, measured in hertz (Hz).
波长是两个相邻波峰或波谷之间的距离。频率是每秒通过某点的完整波的个数，单位是赫兹（Hz）。
Reflection occurs when a wave bounces off a surface. The law of reflection states that the angle of incidence equals the angle of reflection.
反射发生在波遇到障碍物反弹时。反射定律指出，入射角等于反射角。
Refraction is the change in direction of a wave as it passes from one medium to another, caused by a change in the wave's speed. A lens uses refraction to focus light.
折射是波从一种介质进入另一种介质时因波速改变而发生的方向变化。透镜利用折射来聚焦光线。
Sound is produced by vibrating objects. It travels fastest in solids, slower in liquids and slowest in gases because particles are closer together in solids to pass on vibrations.
声音由振动物体产生。声音在固体中传播最快，液体次之，气体最慢，因为固体中粒子靠得更近，更容易传递振动。
6. States of Matter and Particle Theory | 物质状态与粒子理论
All matter is made up of tiny particles. The arrangement, movement and energy of these particles explain the three states of matter: solid, liquid and gas.
所有物质都由微小粒子构成。这些粒子的排列、运动和能量解释了物质的三种状态：固态、液态和气态。
In solids, particles are closely packed in a regular pattern and can only vibrate about fixed positions. This gives solids a fixed shape and volume.
在固体中，粒子紧密排列成规则结构，只能在固定位置振动。因此固体有固定的形状和体积。
In liquids, particles are still close together but can slide past each other. Liquids have a fixed volume but take the shape of their container.
在液体中，粒子仍然紧密但可以相互滑动。液体有固定的体积，但形状随容器而变。
In gases, particles are far apart and move quickly in all directions. Gases have no fixed shape or volume and can be compressed easily.
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，容易被压缩。
Changes of state — melting, freezing, boiling, condensing and sublimating — are physical changes. Mass is conserved during these changes because the number of particles stays the same.
物质状态变化 — 熔化、凝固、沸腾、凝结和升华 — 是物理变化。在这些变化中质量守恒，因为粒子的数量保持不变。
Internal energy is the total kinetic and potential energy of all the particles in a substance. Heating increases internal energy, which can raise the temperature or cause a change of state.
内能是物质中所有粒子的动能和势能之和。加热会增加内能，这可能导致温度升高或发生状态变化。
Density tells you how much mass is packed into a certain volume. Solids are usually denser than liquids and gases because their particles are packed more tightly.
密度表示一定体积内所含质量的多少。固体通常比液体和气体密度更大，因为其粒子排列更紧密。
7. Space Physics | 天体物理
Our solar system consists of the Sun, the eight planets, their moons, dwarf planets, asteroids and comets. The Sun contains over 99% of the mass of the solar system.
我们的太阳系由太阳、八大行星、它们的卫星、矮行星、小行星和彗星组成。太阳占据了太阳系总质量的99%以上。
A planet is a large object that orbits a star and has cleared its orbit of other debris. In order from the Sun, the planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.
行星是围绕恒星运行且已清除其轨道附近其他碎片的巨大天体。按离太阳由近到远的顺序，依次是水星、金星、地球、火星、木星、土星、天王星和海王星。
A moon (natural satellite) orbits a planet. Earth has one moon; Jupiter has more than 90 known moons.
卫星（天然卫星）围绕行星运行。地球有一颗卫星；木星已知的卫星超过90颗。
The gravitational pull of the Sun keeps planets and other objects in orbit. Gravity provides the centripetal force needed for circular motion.
太阳的引力使行星和其他天体保持在轨道上运行。引力提供了圆周运动所需的向心力。
A year on a planet is the time it takes to orbit the Sun once. A day is the time it takes to rotate once on its axis. These periods vary widely across the solar system.
行星上的一年是指它绕太阳公转一周的时间。一天是指它绕自转轴旋转一周的时间。这些周期在太阳系中差异很大。
Stars form from huge clouds of gas and dust called nebulae. The Sun is a main-sequence star; eventually it will expand into a red giant and then shrink into a white dwarf.
恒星由巨大的气体尘埃云（星云）形成。太阳是主序星；最终它会膨胀为红巨星，然后收缩为白矮星。
Light-years are used to measure vast distances in space. One light-year is the distance light travels in one year, about 9.5 trillion kilometres.
光年被用来测量宇宙中的遥远距离。一光年是光在一年中行进的距离，大约9.5万亿千米。
8. Scientific Inquiry and Variables | 科学探究与变量
A hypothesis is a testable explanation or prediction based on prior knowledge. It is often written as an 'If... then...' statement.
假设是基于已有知识提出的可检验的解释或预测，通常以“如果……那么……”的形式表述。
The independent variable is the one you deliberately change in an experiment. The dependent variable is the one you measure or observe.
自变量是你在实验中故意改变的变量。因变量是你测量或观察的变量。
Control variables are all the factors you keep the same to ensure a fair test. Only one independent variable should be changed at a time.
控制变量是你为保持公平测试而保持不变的所有因素。每次只应改变一个自变量。
Accuracy describes how close a measurement is to the true value. Precision describes how close repeated measurements are to each other.
准确度描述测量值接近真实值的程度。精密度描述多次重复测量值彼此接近的程度。
Anomalous results are those that do not fit the pattern in a set of data. They should be identified, repeated if possible, and excluded from calculations of the mean.
异常结果是数据中不符合整体规律的那些。应识别出它们，若可能则重复测量，并在计算平均值时将其排除。
A conclusion sums up what you found out and says whether the evidence supports the hypothesis. It should be backed by the data collected.
结论总结你的发现，并说明证据是否支持假设。结论必须以收集的数据为依据。
9. Common Prefixes and Suffixes in Physics | 物理常见词根词缀
Many physics terms are built from prefixes and suffixes that reveal their meaning. Learning these word parts will help you decode unfamiliar vocabulary quickly.
许多物理术语由揭示其含义的前缀和后缀构成。学习这些构词部分能帮你快速解读生僻词汇。
The prefix 'kilo-' means a thousand. One kilogram (kg) is 1000 grams; one kilowatt (kW) is 1000 watts.
前缀“kilo-”表示一千。1千克是1000克；1千瓦是1000瓦。
'Micro-' indicates one millionth. A micrometre (µm) is one millionth of a metre, often used for wavelengths of light.
“Micro-”表示百万分之一。1微米是一百万分之一米，常用于表示光的波长。
'Therm-' relates to heat. Think of thermal energy, thermometer, and thermostat. 'Photo-' relates to light, as in photon, photograph and photosynthesis.
词根“therm-”与热相关。联想热能、温度计和恒温器。“photo-”与光相关，如光子、摄影和光合作用。
'Hydro-' means water, appearing in hydroelectric, hydrogen and hydrometer. 'Electro-' refers to electricity, found in electron, electrode and electromagnet.
“Hydro-”意为水，出现在水力发电、氢和液体比重计中。“electro-”指电，如电子、电极和电磁铁。
The suffix '-meter' denotes an instrument for measuring: thermometer (temperature), voltmeter (voltage), ammeter (current).
后缀“-meter”表示测量仪器：温度计（测温度）、伏特计（测电压）、安培计（测电流）。
'Grav-' comes from the Latin word for heavy, giving us gravity, gravitational and gravitation.
“Grav-”源自拉丁语“沉重”，衍生出重力、引力的和万有引力等词。
10. Measurement Terms and Units | 测量术语与单位
Physicists use the Système International (SI) units to keep measurements consistent. The most common base units are the metre (m) for length, kilogram (kg) for mass, second (s) for time, and ampere (A) for electric current.
物理学家使用国际单位制（SI）来保持测量的一致性。最常见的基本单位有：长度—米（m），质量—千克（kg），时间—秒（s），电流—安培（A）。
Derived units are made by combining base units. For example, speed has the derived unit m/s (metres per second), and force uses the newton, which is equivalent to kg m/s².
导出单位通过组合基本单位得到。例如，速度的导出单位是米/秒（m/s），力的单位是牛顿，其等效于千克·米/秒²（kg m/s²）。
fixes scale units to more convenient numbers. As well as kilo- and micro-, you should know 'centi-' (one hundredth, 1 cm = 0.01 m) and 'milli-' (one thousandth, 1 mm = 0.001 m).
单位前缀可以将单位缩放到更便利的数值。除了kilo-和micro-，你还应知道“centi-”（百分之一，1厘米 = 0.01米）和“milli-”（千分之一，1毫米 = 0.001米）。
When taking a measurement, you should give the value to the nearest division of the instrument. The uncertainty is usually taken as half of the smallest scale division.
进行测量时，读数应取仪器最小刻度的最近值。不确定度通常取最小刻度值的一半。
Converting between units is an essential skill. To convert centimetres to metres, divide by 100. To convert kilometres to metres, multiply by 1000. Always check that numbers in calculations use the same units.
单位换算是必备技能。厘米换米除以100，千米换米乘以1000。计算时务必确保所有数字使用相同的单位。
A variable resistor (rheostat) allows you to change the resistance in a circuit smoothly. An LDR (light-dependent resistor) changes resistance with light intensity; a thermistor changes resistance with temperature.
变阻器可以平滑地改变电路中的电阻。光敏电阻（LDR）的电阻随光强度变化；热敏电阻的电阻随温度变化。
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