📚 CAIE Year 8 Physics: Vocabulary & Terminology Quick Memory Guide | CAIE 八年级物理：词汇术语速记指南
Welcome to your rapid revision companion for Year 8 CAIE Physics. Mastering the subject starts with owning the language. This guide breaks down key terms topic by topic, giving you memorable hooks and crystal-clear Chinese equivalents to speed up your recall. Use it to sharpen your scientific vocabulary and boost your confidence for tests and classroom discussions.
欢迎使用八年级CAIE物理快速复习伴侣。掌握这门学科始于掌握它的语言。本指南按主题分解关键术语，为你提供好记的联想线索和清晰的中文对等词，加速你的记忆。用它来打磨你的科学词汇量，并为考试和课堂讨论提升信心。
1. Measurements and Units | 测量与单位
Every physical quantity needs a standard unit. Remember: length is measured in metres (m), mass in kilograms (kg), time in seconds (s), and temperature in degrees Celsius (°C). Think of the 'SI family' – without them, data would be meaningless.
每个物理量都需要标准单位。记住：长度用米（m），质量用千克（kg），时间用秒（s），温度用摄氏度（°C）。想象“国际单位制大家庭”——没有它们，数据将毫无意义。
The word 'kilogram' means 1000 grams. The prefix 'kilo-' is your friend: kilometre (km), kilowatt (kW). For small things, 'milli-' means one-thousandth, as in millimetre (mm) and millilitre (ml).
“千克”一词意味着一千克。前缀“千-”是你的好帮手：千米（km）、千瓦（kW）。对于微小事物，“毫-”表示千分之一，如毫米（mm）和毫升（ml）。
the space inside a 10 cm × 10 cm × 10 cm cube. Visualising that cube makes the unit stick.
体积可用立方米（m³）或升来测量。一升就是一个10 cm × 10 cm × 10 cm立方体的空间。想象那个立方体，单位便牢牢记住。
Time is always seconds in equations, never minutes or hours. Convert everything to seconds first – set a mental stopwatch.
时间在公式中总是用秒，绝不能用分钟或小时。先把一切换算成秒——在心里设个秒表。
2. Forces and Motion | 力与运动
A force is a push or a pull, measured in newtons (N). Sir Isaac Newton's name becomes the unit – every time you write 'N', picture the apple that (maybe) fell on his head.
力是推或拉，单位是牛顿（N）。艾萨克·牛顿爵士的名字化作了单位——每次你写下“N”，就想象那颗（据说）砸在他头上的苹果。
weight = mass × 10 N/kg. The trick: mass never changes, weight can if you go to the Moon.
质量是物体所含物质的多少（kg），而重量是重力作用在该质量上的力（N）。在地球上，重量 = 质量 × 10 N/kg。窍门：质量永不改变，如果你去了月球，重量会变。
Friction is the force that opposes motion. Spell it 'fric-tion' and recall 'friction frustrates forward flow' – the 'f' alliteration helps it stick.
摩擦力是阻碍运动的力。把它拼成“fric-tion”，并回想“friction frustrates forward flow”（摩擦力挫败前向流动）——押头韵的“f”让记忆牢固。
peed in a given direction. Imagine a cheetah running in a straight line: its velocity is high; if it zigzags, its speed is still high but average velocity drops.
速率 = 距离 ÷ 时间。速度是给定方向上的速率。想象一头猎豹直线奔跑：它的速度很高；如果它左冲右突，速率仍高，但平均速度会下降。
3. Energy, Work and Power | 能量、功与功率
Energy is the ability to do work, both measured in joules (J). Rhyme it: 'You need joules to pull tools.'
能量是做功的能力，二者单位都是焦耳（J）。用押韵记：“You need joules to pull tools.”
speed². Think of a sprinting cyclist: double the speed means four times the kinetic energy – a powerful reminder to slow down.
动能是运动能量。公式：动能 = ½ × 质量 × 速率²。想想冲刺的自行车手：速率加倍，动能变成四倍——一个提醒你减速的有力警示。
ential energy (GPE) is stored height energy. GPE = mass × gravity × height. Use the phrase 'Mass Gets High' (Mass × Gravity × Height) to recall the multiplication.
重力势能是储存的高度能。GPE = 质量 × 重力强度 × 高度。用短语“Mass Gets High”（质量 × 重力 × 高度）来记乘法。
doing work, unit watt (W). 1 W = 1 J/s. A 60 W lamp transfers 60 joules every second. Link 'watt' to 'what you pay for' – electricity bills use kilowatt-hours.
功率是做功的速率，单位瓦特（W）。1 W = 1 J/s。一盏60 W的灯每秒转移60焦耳。把“watt”联想到“what you pay for”（你为之付费的东西）——电费账单用千瓦时。
4. Density and Pressure | 密度与压强
Density is mass per unit volume. If something feels heavy for its size, it' formula ρ = mass ÷ volume (units kg/m³ or g/cm³). Think of a bowling ball vs a beach ball – same size, very different densities.
密度是单位体积的质量。如果某物掂起来比看起来重，它就致密。公式 ρ = 质量 ÷ 体积（单位 kg/m³ 或 g/cm³）。想想保龄球对比沙滩球——同样大小，密度天差地别。
Picture a stiletto heel sinking into grass: same force as a flat shoe, but huge pressure.
压强是分布在面积上的力：压强 = 力 ÷ 面积，单位帕斯卡（Pa），即 N/m²。锋利的刀 = 小面积 = 高压强。想象细高跟陷入草地：力和平底鞋相同，但压强巨大。
The term 'upthrust' describes the upward force a fluid exerts on an object. An object floats if upthrust equals its weight. Think of 'up' and 'thrust' lifting you in a swimming pool.
术语“上推力”描述流体作用在物体上的向上力。如果上推力等于物体重量，它就漂浮。想象在游泳池里，“向上”和“推力”把你托起。
5. Waves Basics | 波的基础
Waves transfer energy without transferring matter. There are two types: transverse (ripples on water, light) and longitudinal (sound). In a Mexican wave, the crowd stays seated but the ripple moves – perfect image for energy moving through a medium.
波传递能量而不传递物质。有两种类型：横波（水波、光）和纵波（声音）。在墨西哥人浪中，观众坐着不动但波浪在移动——这正是能量通过介质移动的绝佳画面。
Amplitude is the maximum displacement from rest – how big the wave is. Wavelength (λ) is the distance between two consecutive crests. Picture a calm sea suddenly whipped up – amplitude grows.
振幅是偏离平衡位置的最大位移——波有多大。波长（λ）是两个相邻波峰之间的距离。想象平静的海面骤然翻涌——振幅增大。
Frequency is the number of waves per second, in hertz (Hz). 'Hertz' sounds like 'hurts' – high frequency can hurt your ears. Period = 1 ÷ frequency; they are inverses.
频率是每秒波的数量，单位赫兹（Hz）。“Hertz”听起来像“hurts”——高频率会刺痛你的耳朵。周期 = 1 ÷ 频率；它们互为倒数。
Wave speed = frequency × wavelength. Use the memory aid 'V = f λ' as 'Very Fierce Lions'.
波速 = 频率 × 波长。用记忆诀窍 “V = f λ” 联想成“Very Fierce Lions”。
6. Light and Sound | 光与声
w: angle of incidence = angle of reflection. Imagine a snooker ball bouncing off a cushion – measuring those angles with a protractor gives the same number.
光沿直线传播，直到碰到物体。反射遵循定律：入射角等于反射角。想象桌球撞击库边弹回——用量角器量这两个角，会得到相同的度数。
Refraction is the bending of light when it enters a different medium. Remember 'refraction' as 'ray fractured' – the ray breaks direction at the boundary. A straw in water looks bent because of it.
折射是光进入不同介质时的弯曲。把“refraction”记作“ray fractured”（光线断裂）——光线在边界处方向突变。水中的吸管看起来变弯就是这个原因。
Dispersion splits white light into a spectrum: red, orange, yellow, green, blue, indigo, violet. Learn 'ROY G. BIV' for the order.
色散将白光分解成光谱：红、橙、黄、绿、蓝、靛、紫。用“ROY G. BIV”记住顺序。
Sound is a longitudinal vibration. Pitch depends on frequency, loudness on amplitude. A baby’s cry: high frequency, high amplitude – pitch and loudness both up.
声音是纵向振动。音调取决于频率，响度取决于振幅。婴儿的啼哭：频率高、振幅大——音调和响度都高。
7. Electricity Essentials | 电学基础
Current is the flow of electric charge, measured in amperes (A). Think of water flowing through a pipe – more flow equals more current. An ammeter measures it, connected in series like a toll gate on the flow path.
电流是电荷的流动，单位安培（A）。想象水流过管道——流量越大，电流越大。电流表测量电流，串联接入，如同流路上的收费站。
Voltage is the push that drives charge around, measured in volts (V). It is the energy per unit charge. Remember 'voltage gives courage' to charge carriers.
电压是驱动电荷运动的推力，单位伏特（V）。它是单位电荷的能量。记住“voltage gives courage”（电压赋予勇气）来推动载流子。
Resistance is how much a component opposes current, in ohms (Ω). A narrow pipe offers high resistance. Use 'Ohm' as a grumpy old man trying to obstruct the flow – 'Oh, more obstacles!'
电阻是元件阻碍电流的程度，单位欧姆（Ω）。狭窄的管道提供高电阻。把“Ohm”想象成一个试图阻挡水流的怪老头——“哦，更多阻碍！”
A series circuit has a single loop; if one bulb fails, all go out. Parallel circuits provide multiple paths – one bulb out, others stay lit. 'Series is serious about stopping' if one part breaks.
串联电路是单一环路；一盏灯坏掉，全灭。并联电路提供多条路径——一盏灯灭，其他仍亮。“Series is serious about stopping”（串联对停止是认真的），只要一处断开。
8. Magnetism Starter | 磁学入门
A magnet has a north and south pole. Like poles repel, unlike poles attract. The rhyme 'opposites attract, likes retract' works for magnets and friendships.
磁铁有北极和南极。同名极相斥，异名极相吸。押韵句“opposites attract, likes retract”（异性相吸，同性相斥）适用于磁铁和友谊。
The magnetic field is the region where magnetic force is felt. Field lines go from north to south. Sprinkle iron filings and they line up like obedient arrows. Visualise an invisible bubble around the magnet.
磁场是能感受到磁力的区域。磁感线从北极指向南极。撒下铁屑，它们会像顺从的箭头一样排列。想象磁铁周围有一个无形的泡泡。
An electromagnet is a coil of wire with a current flowing through it, often around an iron core. Its magnetism can be switched on and off – think 'electric + magnet'. Used in scrap-yard cranes.
电磁铁是通电的线圈，通常绕在铁芯上。它的磁性可以开关——想到“电+磁”。用于废料场的起重机。
9. States of Matter and Thermal Physics | 物质状态与热物理
Solid has fixed shape and volume, particles are tightly packed. Liquid has fixed volume but takes the shape of its container, particles slide past each other. Gas has no fixed shape or volume, particles zip around.
固体有固定的形状和体积，粒子紧密排列。液体有固定体积，但取容器的形状，粒子互相滑动。气体无固定形状和体积，粒子快速飞窜。
Melting is solid to liquid; freezing the reverse. Boiling is liquid to gas throughout the liquid; evaporation happens only at the surface. Use 'Beans On Toast' for Boiling Occurs Throughout – a silly breakfast image that sticks.
熔化是固体变液体；凝固相反。沸腾是液体内部整体变为气体；蒸发仅在表面发生。用“Beans On Toast”（吐司上的豆子）记沸腾发生在整体（Boiling Occurs Throughout）——荒诞的早餐画面很难忘记。
uction is heat transfer through solids by particle vibrations. Convection occurs in fluids – l sinks. Radiation is heat transfer by infrared waves, can travel through vacuum. Remember 'Conduction→contact, Convection→currents, Radiation→rays'.
传导是通过粒子振动在固体中的传热。对流发生在流体中——热流体上升，冷流体下沉。辐射是通过红外波传热，可在真空中行进。记住“Conduction→contact（接触），Convection→currents（流动），Radiation→rays（射线）”。
Melting point and boiling point are physical properties. Water melts at 0 °C and boils at 100 °C. Imagine ice stubbornly staying solid until 0 °C finally gives in.
熔点和沸点是物理性质。水在0 °C熔化，100 °C沸腾。想象冰块固执地保持固态，直到0 °C才最终妥协。
10. Space Physics and Gravity | 空间物理与引力
Gravity is the attractive force between masses. On Earth, it gives objects weight. In space, gravity keeps planets in orbit around the Sun. Think of the Sun’s gravity as an invisible rope swinging Earth around.
引力是质量之间的吸引力。在地球上，它赋予物体重量。在太空中，引力使行星围绕太阳公转。把太阳的引力想象成一根无形的绳子，抡着地球转圈。
A planet orbits a star; a moon orbits a planet. The Solar System includes the Sun, eight planets, moons, asteroids and comets. 'My Very Educated Mother Just Served Us Noodles' for Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune.
行星绕恒星运转；卫星绕行星运转。太阳系包括太阳、八颗行星、卫星、小行星和彗星。“My Very Educated Mother Just Served Us Noodles”（我那受过良好教育的母亲刚给我们端上了面条）记水星、金星、地球、火星、木星、土星、天王星、海王星。
A light-year is the distance light travels in one year, not a time unit. It’s about 9.5 trillion kilometres. The name tricks many; remind yourself: 'light-YEAR' still measures how far, not how long.
光年是光在一年中行进的距离，不是时间单位。约等于9.5万亿公里。这个名字误导了很多人；提醒自己：“光-年”测量的是多远，而不是多久。
A satellite is any object that orbits a planet. The Moon is a natural satellite; GPS satellites are artificial. 'Satellite' sounds like 'sitting light' – sitting in orbit, beaming signals down.
卫星是绕行星运行的任何物体。月球是天然卫星；GPS卫星是人造的。“Satellite”听起来像“sitting light”（坐着的灯）——坐在轨道上，朝下发射信号。
Published by TutorHao | Physics Revision Series | aleveler.com
更多咨询请联系16621398022（同微信）
或截图后用「扫一扫 → 相册」选择本图