📚 Quick Memory Guide for Year 8 SQA Physics Vocabulary | Year 8 SQA 物理词汇速记指南
Mastering the key vocabulary in Year 8 SQA Physics is like learning the alphabet before reading – it unlocks everything. This guide pairs each term with a clear definition, a simple memory trick and a real-world example, so you can recall and use them confidently in tests and experiments.
掌握 Year 8 SQA 物理的关键词汇就像在阅读前学习字母表——它能够解锁一切。本指南为每个术语配上清晰的定义、简单的记忆技巧和真实世界的例子，让你能够在考试和实验中自信地回忆和使用它们。
1. Force | 力
it can cause acceleration, deceleration, change of direction or change of shape. Think of 'Force = A push or pull that Changes motion' – the capital C reminds you it Causes Change.
力是作用在物体上的推或拉；它可以导致加速、减速、方向改变或形状改变。记住“力 = 推或拉，引发改变”，开头的“推”和“变”能帮你联想到“推移变化”。
held in your hand feels about 1 N of gravitational force on Earth. So, 1 N ≈ apple-weight.
力的单位是牛顿 (N)。在地球上，手心里托着的一个小苹果大约感受到 1 牛顿的重力。因此，1 N ≈ 一个苹果的重量。
Forces often come in pairs. If you push a wall, the wall pushes back – that is Newton's third law. Memory phrase: 'Action–reaction, always in pairs'.
力通常成对出现。你推墙时，墙也推你——这就是牛顿第三定律。记忆口诀：“有作用力，必有反作用力，成双成对”。
2. Mass vs Weight | 质量与重量
Mass is the amount of matter in an object and is measured in kilograms (kg). It never changes, no matter where you are – on Earth, on the Moon or floating in space.
质量是物体所含物质的多少，单位是千克 (kg)。无论你在哪里——地球、月球或太空漂浮——质量永不改变。
Weight is the pull of gravity on a mass, measured in newtons (N). It changes with the strength of gravity. On the Moon, your weight is about 1/6 of your Earth weight.
重量是重力对质量的拉力，单位是牛顿 (N)。它随重力强度而变。在月球上，你的重量大约是地球上的六分之一。
Memory trick: Remember 'Mass stays Massive everywhere; Weight Wobbles with gravity'. The 'M' in Mass for 'Matter', the 'W' in Weight for 'Wobble'.
记忆技巧：记住“质量永远 Massive；重量随重力 Wobble”。Mass 的 M 代表 Matter（物质），Weight 的 W 代表 Wobble（摇摆，变化）。
tion: Weight (N) = Mass (kg) × Gravitational field strength (N/kg). On Earth, g ≈ 10 N/kg.
公式：重量 (N) = 质量 (kg) × 重力场强度 (N/kg)。地球上，g ≈ 10 N/kg。
3. Speed, Velocity and Acceleration | 速率、速度与加速度
Speed tells you how fast something is moving – the distance covered per unit time. It is a scalar (magnitude only). Typical units: metres per second (m/s).
速率告诉你物体移动有多快——单位时间内通过的距离。它是标量（只有大小）。常用单位：米每秒 (m/s)。
Velocity is speed in a given direction; it is a vector. A car going round a roundabout at constant speed has changing velocity because its direction changes.
速度是带方向的速率；它是矢量。一辆车以恒定速率绕环岛行驶，因为方向在变，所以速度在变。
Acceleration is the rate of change of velocity. If velocity increases, acceleration is positive; if it decreases, we sometimes say deceleration or negative acceleration. Unit: m/s².
加速度是速度的变化率。速度增加时，加速度为正；减小时，有时称为减速或负加速度。单位：米每二次方秒 (m/s²)。
Memory aid: 'Speed is how fast, Velocity adds where you're headed, Acceleration is how quickly you change the how-fast.'
记忆辅助：“Speed 看多快，Velocity 还看方向，Acceleration 看你改变得多快。”
t (speed = distance ÷ time). Acceleration: a = (final velocity - initial velocity) / time.
平均速率公式：v = d/t（速率 = 距离 ÷ 时间）。加速度公式：a = (末速度 - 初速度) / 时间。
4. Energy Forms and Transfers | 能量形式与转化
Energy is the ability to do work. It is measured in joules (J). Energy cannot be created or destroyed, only transferred or transformed (conservation of energy).
能量是做功的能力，单位是焦耳 (J)。能量既不能创生也不能消灭，只能转移或转化（能量守恒）。
Common energy stores: kinetic (movement), gravitational potential (height), elastic potential (stretched/compressed), thermal (heat), chemical (food, fuel), nuclear, electrostatic, magnetic.
常见能量储存：动能（运动）、重力势能（高度）、弹性势能（拉伸/压缩）、热能、化学能（食物、燃料）、核能、静电能量、磁能。
Memory trick: 'King Gnu Eats Tasty Candy Nuggets' – Kinetic, Gravitational, Elastic, Thermal, Chemical, Nuclear. Invent your own story!
记忆口诀（中文版）：“重弹热化核电”——重力势能、弹性势能、热能、化学能、核能、电能。可以自己编故事：“那只重型弹弓热得化成核电了”。
Energy transfer pathways: mechanically (by forces), electrically (by current), by heating, by radiation (light, sound). Remember M.E.H.R. – Mechanical, Electrical, Heating, Radiation.
能量转移路径：机械做功（力）、电做功（电流）、加热、辐射（光、声）。记住“机、电、热、辐”四兄弟。
5. Work and Power | 功与功率
distance (m). No movement means zero work, even if you feel tired holding something still.
当力使物体沿力的方向移动时就做了功。功 (J) = 力 (N) × 距离 (m)。没有移动意味着做功为零，即使你举着重物感觉累。
Memory: 'Work = Force that Works over a distance.' The word 'works' reminds you the object must be moving.
记忆：“功 = 力在距离上‘做功’。”物体必须移动才算做功。
k or transferring energy. Power (W) = work (J) / time (s). The unit watt (W) equals 1 J/s.
功率是做功或转移能量的速率。功率 (W) = 功 (J) / 时间 (s)。单位瓦特 (W) 等于 1 J/s。
Think of two climbers reaching the same top – both do the same work, but the faster one has more power. So, 'Power tells how Fast the work gets done.'
设想两名登山者到达同一山顶——两人做功相同，但更快的那个功率更大。所以，“功率告诉你做功有多快。”
6. Electric Circuits | 电路
A circuit is a closed loop that allows electric charge to flow. For a current to flow, the circuit must be complete and include a source of voltage (like a cell or battery).
电路是允许电荷流过的闭合回路。要产生电流，电路必须是完整的，并且包含电压源（如电池）。
Component symbols: a cell (long line positive, short negative), battery (two or more cells), bulb, switch (open/closed), resistor, variable resistor, fuse, voltmeter, ammeter.
元件符号：电池（长线正极，短线负极）、电池组（两个或多个电池）、灯泡、开关（断开/闭合）、电阻、可变电阻、保险丝、电压表、电流表。
Memory for series vs parallel: In series, 'One path – if one goes out, all go out.' In parallel, 'Multiple paths – one goes out, rest stay on.' Like old Christmas lights vs modern ones.
串联与并联记忆：串联“一条道——一个灭，全灭”；并联“多条道——一个灭，其他亮”。就像老式圣诞灯饰与新式的区别。
7. Current, Voltage and Resistance | 电流、电压与电阻
in amperes or amps (A). Think of water flowing through a pipe: more flow = bigger current.
电流 (I) 是电荷的流动，单位是安培 (A)。想象水在管道中流动：水流量越大，电流越大。
Voltage (V) is the 'push' or energy per unit charge that makes the current move. It is measured in volts (V). Analogy: voltage is like the pressure pushing water through a hose.
电压 (V) 是推动电流移动的“推力”或每单位电荷的能量，单位是伏特 (V)。类比：电压就像推动水通过软管的水压。
Resistance (R) is how much a component resists the flow of current, measured in ohms (Ω). A thin wire has more resistance than a thick one, like a narrow pipe restricts water flow.
电阻 (R) 是元件阻碍电流流动的程度，单位是欧姆 (Ω)。细导线比粗导线电阻大，就像窄管道限制水流。
Ohm's law: V = I × R. Memory phrase: 'Vicky Is Right' (V = I × R). Or visually: cover the quantity you want in a triangle.
欧姆定律：V = I × R。记忆法：“Vicky 是对的”，或使用三角形覆盖你想求的量。
8. Waves and their Properties | 波与其特性
A wave transfers energy from one place to another without transferring matter. Two main types: transverse (vibrations perpendicular to energy direction, e.g. light, water waves) and longitudinal (vibrations parallel to energy direction, e.g. sound).
波将能量从一个地方传递到另一个地方而不传递物质。两种主要类型：横波（振动方向垂直于能量传播方向，如光波、水波）和纵波（振动平行于能量传播方向，如声波）。
Memory for transverse: 'Transverse travels across, like a flicking rope.' For longitudinal: 'Longitudinal along, like a slinky push-pull.'
横波记忆：“横向（transverse）像甩动的绳子，上下振动但波向前走”。纵波：“纵向（longitudinal）像弹簧的推拉，压缩和稀疏沿同一直线”。
Key wave terms: crest (peak), trough (lowest point), amplitude (height from rest to crest), wavelength (distance from one crest to the next), frequency (number of waves per second, unit hertz Hz).
关键波术语：波峰、波谷、振幅（从平衡位置到波峰的高度）、波长（从一个波峰到下一个波峰的距离）、频率（每秒波的数量，单位赫兹 Hz）。
9. Frequency, Wavelength and Wave Speed | 频率、波长与波速
frequency = short wavelength. The human ear can hear sounds from about 20 Hz to 20 000 Hz.
频率 (f) 是每秒钟通过某点的完整波的数量。高频率意味着短波长。人耳能听到的声音频率大约在 20 Hz 到 20 000 Hz 之间。
Wavelength (λ, lambda) is the distance between two matching points on a wave, e.g. crest to crest. Measured in metres (m).
波长 (λ, 拉姆达) 是波上两个对应点之间的距离，例如波峰到波峰。单位是米 (m)。
Wave speed equation: v = f × λ (wave speed = frequency × wavelength). Memory trick: 'Very Fast Lions' – V = F × L. Cover the quantity you need in a formula triangle.
波速公式：v = f × λ（波速 = 频率 × 波长）。记忆法：“Very Fast Lions”——V = F × L。使用公式三角形覆盖你想求的量。
For a constant wave speed, if frequency doubles, wavelength halves. Just like squeezing more waves into the same distance.
在波速恒定的情况下，频率加倍，波长减半。就像把更多波挤进同样的距离。
10. Electromagnetic Spectrum | 电磁波谱
The electromagnetic (EM) spectrum is a family of transverse waves that all travel at the speed of light in a vacuum (300 000 000 m/s). They differ in frequency and wavelength.
电磁波谱是一组横波，在真空中都以光速（300 000 000 m/s）传播。它们的频率和波长不同。
Order from longest wavelength (lowest frequency) to shortest: Radio, Microwave, Infrared, Visible light, Ultraviolet, X-ray, Gamma. Memory sentence: 'Raging Martians Invaded Venus Using X-ray Guns.'
按波长从长到短（频率从低到高）的顺序：无线电波、微波、红外线、可见光、紫外线、X 射线、伽马射线。记忆句子：“愤怒的火星人用 X 光枪入侵了金星”。中文版：“红微红紫外 X 伽”（红外、微波、可见光、紫外、X、伽马），但注意顺序：无线电、微波、红外、可见、紫外、X、伽马——可记为“无微不至可见紫外 X 伽”。
All EM waves can be reflected, refracted and absorbed. Our eyes only detect a small slice – visible light, ranging from red (longest) to violet (shortest) in the visible spectrum.
所有电磁波都能被反射、折射和吸收。我们的眼睛只能探测到一小部分——可见光，在可见光谱中，从红（波长最长）到紫（波长最短）。
Uses memory: Radio – broadcasting; Microwave – cooking, Wi-Fi; Infrared – thermal cameras, TV remotes; Visible – seeing; Ultraviolet – sun tan, disinfection; X-ray – bone imaging; Gamma – cancer treatment, sterilisation.
用途记忆：无线电波——广播；微波——烹饪、Wi-Fi；红外线——热像仪、电视遥控器；可见光——视觉；紫外线——晒黑、消毒；X 射线——骨骼成像；伽马射线——癌症治疗、灭菌。
11. Space Physics – Gravity and Orbits | 空间物理——引力与轨道
Gravity is a force of attraction between all masses. The larger the masses, the stronger the pull. The further apart they are, the weaker the pull. It's what keeps planets in orbit around the Sun and the Moon around Earth.
引力是所有质量之间的一种吸引力。质量越大，引力越强。距离越远，引力越弱。它使行星围绕太阳运行，月球围绕地球运行。
An orbit is a balance between gravity pulling inwards and the speed of the object trying to fly away in a straight line. The Moon is constantly 'falling' towards Earth but moving forward fast enough to keep missing it – that's an orbit.
轨道是引力向内拉和物体试图沿直线飞离的速度之间的平衡。月球不断“落向”地球，但向前的速度足够快，总是错过——这就是轨道。
Weightlessness in space is not zero gravity; astronauts are in free fall along with their spacecraft. They feel weightless because everything around them is falling at the same rate.
太空中的失重并不是零重力；宇航员和他们的航天器一起处于自由落体状态。他们感觉失重是因为周围的一切都以同样的速率下落。
Memory: 'Gravity Gives Ground and Grasps Galaxies.' And for orbit: 'Falling forever around the bend.'
记忆：“引力给予地面，也抓住星系。”对于轨道：“永远向着弯道坠落。”
12. Quick Review Table of Key Units | 关键单位速查表
| Quantity 物理量 | Symbol 符号 | Unit 单位 | Unit Symbol 单位符号 |
|---|---|---|---|
| Force 力 | F | newton 牛顿 | N |
| Mass 质量 | m | kilogram 千克 | kg |
| Weight 重量 | W | newton 牛顿 | N |
| Speed 速率 | v | metres per second 米每秒 | m/s |
| Acceleration 加速度 | a | metres per second squared 米每二次方秒 | m/s² |
| Energy 能量 | E | joule 焦耳 | J |
| Work 功 | W | joule 焦耳 | J |
| Power 功率 | P | watt 瓦特 | W |
| Current 电流 | I | ampere 安培 | A |
| Voltage 电压 | V | volt 伏特 | V |
| Resistance 电阻 | R | ohm 欧姆 | Ω |
| Frequency 频率 | f | hertz 赫兹 | Hz |
| Wavelength 波长 | λ | metre 米 | m |
Keep this table handy for quick checks. A strong vocabulary is the secret toolkit that turns tricky physics problems into clear steps.
将这张表格放在手边以便快速查阅。扎实的词汇是秘诀工具包，能把棘手的物理问题转化为清晰的步骤。
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