📚 Year 10 SQA Physics: Quick Guide to Memorising Key Terms | 苏格兰SQA物理十年级：核心术语速记指南
Physics is a subject built on precise language. Every term carries a specific meaning, and confusing them can cost marks in the SQA National 5 exam. This guide breaks down the most important vocabulary into manageable topics and shows you how to lock each word into your memory using mnemonics, word origins and visual associations.
物理是一门建立在精确语言上的学科。每个术语都有特定的含义，混淆它们可能会在 SQA 国家 5 级考试中失分。本指南将最重要的词汇分解成易于掌握的主题，并向你展示如何利用助记法、词源和视觉联想将每个词语牢牢记在脑海中。
1. Kinematics and Forces | 运动学与力
Displacement is the distance moved in a straight line in a given direction (vector). Think 'dis-place' – you move from one place to another, and the straight arrow shows displacement. Velocity is the rate of change of displacement: v = Δs/Δt. Associate 'velo' with speed, but remember it is a vector. Acceleration is the rate of change of velocity: a = Δv/Δt. When you 'accelerate' in a car, your speed changes – that change per second is acceleration.
位移是沿给定方向直线移动的距离（矢量）。想象“dis-place”——你从一个地点移动到另一个地点，那条直线箭头就是位移。速度是位移的变化率：v = Δs/Δt。将“velo”与快速联系起来，但记住它是矢量。加速度是速度的变化率：a = Δv/Δt。当你在汽车里“加速”时，你的速度在变化——每秒的变化量就是加速度。
Force is a push or pull measured in newtons (N) that can change an object's motion. Link to F = ma: mass times acceleration. To remember Newton's three laws, use the mnemonic 'I AM': Inertia (object stays as is unless acted upon), Acceleration (F=ma), Mutual forces (action–reaction pairs). For momentum (p = mv), picture a heavy truck moving – its 'momentum' keeps it going. Impulse equals change in momentum (FΔt = Δp).
力是一种推或拉，以牛顿（N）为单位，能够改变物体的运动状态。联系公式 F = ma：质量乘以加速度。要记住牛顿三大定律，可以使用助记“I AM”：Inertia 惯性（物体保持原状直到有力作用），Acceleration 加速度（F=ma），Mutual forces 相互作用力（作用力与反作用力对）。对于动量（p = mv），想象一辆重型卡车在移动——它的“动量”让它继续前进。冲量等于动量的变化（FΔt = Δp）。
2. Energy, Work and Power | 能量、功和功率
Kinetic energy (Eₖ = ½mv²) is the energy of motion. 'Kinetic' sounds like 'kinetic' (moving). Gravitational potential energy (Eₚ = mgh) is energy due to height. Think 'potential' to fall. Work done ject through a distance. Work is energy transferred, so both are in joules (J). If you lift a book, you do work against gravity, storing Eₚ.
动能（Eₖ = ½mv²）是运动的能量。“Kinetic”听起来像“运动的”。重力势能（Eₚ = mgh）是因高度而具有的能量。想象有“潜在”的坠落可能。做功（W = Fd）发生在力使物体沿力的方向移动一段距离时。功是转移的能量，因此二者都以焦耳（J）为单位。如果你抬起一本书，你就克服重力做了功，储存了重力势能。
Power ansfer, measured in watts (W). Remember: a more powerful engine does the same work in less time. Efficiency = useful output energy ÷ total input energy (×100%). No machine is 100% efficient – always some energy is 'wasted' as heat. Use the phrase 'Useful Out / Total In' to recall the fraction.
功率（P = E/t 或 W/t）是能量转移的速率，以瓦特（W）为单位。记住：一台功率更大的引擎能在更短时间内完成同样的功。效率= 有用输出能量 ÷ 总输入能量（×100%）。没有机器能达到100%的效率——总有一部分能量以热的形式“浪费”掉。用“有用输出 / 总输入”这句话来回忆这个分数。
3. Electricity and Circuits | 电学与电路
Current (I) is the flow of electric charge, measured in amperes (A). Think of a river's current – a flow of water. Voltage (V) or potential difference is the energy per unit charge, measured in volts (V). It is the 'push' that drives the current. Resistance water analogy: voltage = pressure, current = flow rate, resistance = pipe narrowness. Ohm's Law: V = IR.
电流（I）是电荷的流动，以安培（A）为单位。想象一股水流——电荷的流动。 电压（V）或电位差是每单位电荷的能量，以伏特（V）为单位。它是驱动电流的“推力”。电阻（R）阻碍电流，以欧姆（Ω）为单位。使用水流类比：电压相当于水压，电流相当于水流速，电阻相当于管道的粗细。欧姆定律：V = IR。
In series circuits, current is the same everywhere, but voltage splits. Components share the total voltage. In parallel circuits, voltage is the same across each branch, but current splits. Remember 'SAME' for series: Same Amps through each component; for parallel: Same Volts across each branch. Ohmic conductors have constant resistance (at constant temperature), while a filament lamp's resistance increases with temperature.
在串联电路中，电流处处相同，但电压会被分配。各元件分担总电压。在并联电路中，每个支路两端的电压相同，但电流会分流。记住串联的“SAME”：每个元件中电流相同（Same Amps）；并联则记住电压相同（Same Volts）。欧姆导体在温度恒定时电阻保持不变，而灯丝的电阻会随着温度升高而增大。
4. Waves: Properties and Behaviour | 波的性质与行为
Frequency (f) is the number of waves per second, unit hertz (Hz). Period (T) is the time for one complete wave cycle, T = 1/f. Amplitude is the maximum displacement from the rest position – the wave's 'height'. Wavelength phase, e.g. crest to crest. Use the formula v = fλ (wave speed = frequency × wavelength).
频率（f）是每秒的波的个数，单位赫兹（Hz）。周期（T）是完成一个完整波循环所需的时间，T = 1/f。振幅是偏离平衡位置的最大位移——波的高度。波长（λ）是相邻同相位点之间的距离，例如波峰到波峰。使用公式 v = fλ（波速 = 频率 × 波长）。
Transverse waves vibrate perpendicular to the direction of energy transfer (e.g. light, water waves). Longitudinal waves vibrate parallel to the direction (e.g. sound). To recall, think 'trans' = across, so vibration is across the movement. Diffraction is the spreading of waves when they pass through a gap or around an obstacle – the narrower the gap, the greater the spreading. Refraction is the change in direction when a wave enters a new medium at an angle, due to a change in speed.
横波的振动方向与能量传递方向垂直（如光波、水波）。纵波的振动方向与能量传递方向平行（如声波）。为便于记忆，想到“trans”意为横穿，因此振动是横穿传播方向。衍射是波通过狭缝或遇到障碍物时发生扩展的现象——狭缝越窄，扩展越明显。折射是波倾斜进入新介质时由于速度改变而发生的方向变化。
5. Heat and Thermodynamics | 热学与热力学
Temperature measures the average kinetic energy of particles (°C or K). Heat is the energy transferred from a hotter object to a cooler one, measured in joules. Think: temperature tells 'how hot', heat tells 'how much thermal energy is transferred'. Specific heat capacity c) is the energy needed to raise 1 kg of a substance by 1 °C: E = mcΔθ. Water has a high c – it takes a lot of energy to warm up.
温度是粒子平均动能的量度（°C 或 K）。热量是从高温物体传递到低温物体的能量，以焦耳为单位。记住：温度表示“有多热”，热量表示“传递了多少热能”。比热容（c）是使 1 kg 物质升高 1 °C 所需的能量：E = mcΔθ。水的比热容很大——加热水需要很多能量。
Latent heat is the energy absorbed or released during a change of state without temperature change. Specific latent heat of fusion (Lf) is for melting/freezing; specific latent heat of vaporisation (Lv) is for boiling/condensing. 'Fusion' means melting (think 'fuse' together). Conduction is heat transfer through a solid via particle vibration; convection is in fluids by movement of the particles themselves; radiation is via infrared waves, requiring no medium.
潜热是在温度不变时状态变化过程中吸收或释放的能量。熔解比潜热（Lf）针对熔化/凝固过程；汽化比潜热（Lv）针对沸腾/凝结过程。“Fusion”意为熔化，联想“fuse”（熔合）。热传导是通过固体中粒子的振动传递热量；热对流是在流体中通过粒子本身的运动传热；热辐射则是通过红外波传递，无需介质。
6. Light and Optics | 光与光学
Law of reflection: angle of incidence i = angle of reflection r, measured from the normal. 'Normal' means an imaginary line perpendicular to the surface. Refraction is the bending of light when it passes from one transparent medium to another – it speeds up or slows down. If light goes into a denser medium (e.g. air to glass), it bends towards the normal. Remember 'FAST' – Fast Away, Slow Towards: in a denser medium, light slows down and bends TOWARDS the normal.
反射定律：入射角 i = 反射角 r，均从法线量起。“法线”是一条垂直于表面的假想线。折射是光从一种透明介质进入另一种介质时发生的弯曲——光速改变。如果光进入光密介质（如从空气进入玻璃），它会向法线偏折。记住“FAST”助记法：Fast Away（快则远离）, Slow Towards（慢则靠近）：在光密介质中光速变慢，向法线偏折。
Critical angle (θc) is the angle of incidence in the denser medium for which the angle of refraction is 90°. Total internal reflection occurs when the angle of incidence > critical angle, and all light reflects back inside. This is used in optical fibres. Lenses: a converging lens (convex) focuses parallel rays to a point (focal point). A diverging lens (concave) spreads rays out. 'Converge' means come together.
临界角（θc）是在光密介质中使折射角为 90° 的入射角。当入射角大于临界角时发生全内反射，所有光线都反射回介质内部。这被用于光纤中。透镜：会聚透镜（凸透镜）将平行光线会聚到一点（焦点）。发散透镜（凹透镜）则使光线发散。“会聚”即聚拢在一起。
7. Nuclear Physics | 核物理
Isotopes are atoms of the same element with the same proton number but different neutron numbers. They have the same chemical properties but different masses. Radioactive decay is the spontaneous emission of radiation from an unstable nucleus. Three types: alpha (α, helium nucleus), beta (β, fast electron), gamma (γ, electromagnetic wave). Use the phrase 'Alpha stopped by Paper, Beta by Aluminium, Gamma needs thick Lead' to remember penetration.
同位素是质子数相同但中子数不同的同一种元素的原子。它们化学性质相同，但质量不同。放射性衰变是不稳定原子核自发发射辐射的现象。三种类型：α（阿尔法，氦核），β（贝塔，高速电子），γ（伽马，电磁波）。用“Alpha 被纸挡住，Beta 被铝挡住，Gamma 需要厚铅板”来记忆穿透能力。
Half-life is the time taken for half of the radioactive nuclei in a sample to decay. It is constant for a given isotope and unaffected by temperature or pressure. Nuclear fission is the splitting of a large nucleus (e.g. uranium-235) into smaller nuclei, releasing energy. Nuclear fusion is the joining of light nuclei (e.g. hydrogen isotopes) to form a heavier nucleus, releasing even more energy – this powers the Sun.
半衰期是样本中一半放射性原子核发生衰变所需的时间。对特定同位素而言半衰期是恒定的，不受温度或压强影响。核裂变是一个大原子核（如铀-235）分裂成较小的核，并释放能量。核聚变是轻核（如氢的同位素）结合形成较重的核，释放出甚至更多的能量——正是这个过程为太阳提供动力。
8. Electromagnetism | 电磁学
Magnetic field is a region where magnetic materials or moving charges experience a force. Field lines go from north to south outside a magnet. An electromagnet is a coil of wire (solenoid) with a soft iron core, which becomes magnetic when current flows. The strength can be increased by more turns, larger current, or an iron core. Motor effect: a current-carrying wire in a magnetic field experiences a force. Fleming' d rule helps: thumb = force, first finger = field (N→S), second finger = current (+ to -).
磁场是磁性材料或运动电荷会受到力的区域。磁体外部的磁感线从北极指向南极。电磁铁是一个带有软铁芯的线圈（螺线管），当电流通过时会产生磁性。通过增加匝数、加大电流或加入铁芯可以增强磁场强度。电动机效应：磁场中的载流导线会受到力的作用。用弗莱明左手定则记忆：拇指=受力方向，食指=磁场方向（N→S），中指=电流方向（+到 -）。
Generator effect: moving a wire in a magnetic field (or changing the field) induces a voltage. This is electromagnetic induction – the basis of generators and dynamos. When the wire cuts magnetic field lines, an emf is induced. A transformer changes the voltage of an alternating current: Vₚ/Vₛ = Nₚ/Nₛ. 'Step-up' increases voltage (more turns on secondary), 'step-down' decreases it. The mnemonic 'PP = SS' can remind you Primary Power ≈ Secondary Power (for ideal transformers).
发电机效应：导线在磁场中运动（或磁场变化）会感应出电压。这就是电磁感应——发电机和发电机动圈的基础。当导线切割磁感线时，就会产生感应电动势。变压器用来改变交流电压：Vₚ/Vₛ = Nₚ/Nₛ。“升压”变压器增大电压（次级匝数更多），“降压”变压器降低电压。助记法“PP ≈ SS”提醒你初级功率约等于次级功率（理想变压器）。
9. Space Physics | 空间物理
Gravity f is the attractive force between masses. Weight is the force of gravity on an object: W = mg. Gravitational field strength g on Earth is about 9.8 N/kg. Orbital velocity is the speed needed for an object to stay in a stable orbit around a planet or star. The closer to the central body, the greater the orbital speed required. Satellites are continually 'falling' towards Earth but moving forward enough to keep missing it.
引力是质量之间相互吸引的力。重量是作用在物体上的重力：W = mg。地球表面的引力场强度 g 约为 9.8 N/kg。轨道速度是物体绕行星或恒星稳定运行所需的速度。离中心天体越近，所需轨道速度越大。卫星持续向地球“坠落”，但又因足够快的切向速度而不断错过地球，从而维持轨道。
Red shift is the observed increase in wavelength of light from distant galaxies moving away from us. It provides evidence for the expanding Universe. The greater the red shift, the faster the galaxy is receding. This leads to the Big Bang theory, stating the universe began from a single point and has been expanding ever since. Cosmic microwave background radiation (CMBR) is leftover energy from the Big Bang, observable in all directions.
红移是观测到的来自遥远星系的光波波长增加的现象，表明这些星系正在远离我们。它为宇宙膨胀提供了证据。红移量越大，星系远离我们的速度越快。由此引出大爆炸理论，该理论认为宇宙起源于一个点并一直在膨胀。宇宙微波背景辐射（CMBR）是大爆炸遗留下的能量，可在太空中各个方向被探测到。
10. Rapid Memorisation Techniques | 速记方法总结
Acronyms and acrostics: For series circuits use 'SAME' (Same Amps everywhere). For electromagnetic spectrum order (Radio, Micro, Infrared, Visible, Ultraviolet, X-ray, Gamma), try 'Raging Martians Invaded Venus Using X-ray Guns'. Chunking: Group related terms together: kinematics terms like v, a, s, t all appear in equations of motion. Link them in a story: a car (displacement) moves with speed (velocity) and speeds up (acceleration) over time.
首字母缩略法和藏头诗：串联电路用“SAME”（各处电流相同）。电磁波谱顺序（无线电、微波、红外、可见光、紫外、X射线、伽马）可用“愤怒的火星人用X射线枪入侵金星”来记忆。组块记忆：将相关术语分组：运动学中的 v、a、s、t 都出现在运动学公式中。将它们串成一个小故事：一辆汽车（位移）以某个速度行驶（速度），并在时间推移中加速（加速度）。
Visualisation: Draw a diagram for total internal reflection – a ray bouncing inside a glass block reminds you of critical angle and condition. Word origins: Many physics words have Latin or Greek roots. 'Kinetic' from 'kinesis' (movement), 'potential' from 'potens' (able, powerful). 'Isotope' from 'isos' (equal) + 'topos' (place) – same place on periodic table. Linking to everyday language reinforces memory: 'Refraction' – 'fract' means break, light 'breaks' direction. Finally, active recall and spaced repetition: write key definitions on flashcards and test yourself regularly, leaving increasing gaps between reviews.
视觉化：画一个全内反射的示意图——光线在玻璃块内反弹的情景能帮你记住临界角及其条件。词源记忆：许多物理词汇来自拉丁语或希腊语。“Kinetic”源自“kinesis”（运动），“potential”源自“potens”（有能力的）。“Isotope”来自“isos”（相同）+“topos”（位置）——在周期表中相同的位置。将词语与日常语言联系起来能加强记忆：“Refraction”（折射）中“fract”意为断裂，光线“折断”了方向。最后，主动回忆与间隔重复：将关键定义写在抽认卡上，定期自我测试，并逐渐增加两次复习之间的间隔时间。
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