📚 AQA Year 8 Physics: Essential Vocabulary Quick-Memorisation Guide | AQA 八年级物理：核心词汇速记指南
Year 8 physics introduces you to a wave of new terms that form the backbone of everything from forces to energy and electricity. Mastering this vocabulary early on makes problem-solving, practical work and exam questions far less intimidating. This guide presents the key words you need to know, with clear definitions in English followed by matching Chinese explanations, plus clever memory hooks that speed up recall. By connecting physical ideas to simple images and patterns, you will build a solid foundation for AQA success.
八年级物理带来了一系列全新的术语，它们构成了从力到能量再到电学的基础。尽早掌握这些词汇可以让你在面对解题、实验和考试时更加从容。本指南列出了你需要掌握的核心词汇，每个词都提供清晰的英文定义和对应的中文解释，并附上巧妙的记忆挂钩，帮助你快速回忆。通过把物理概念与简单的图像和规律联系起来，你将为 AQA 物理打下扎实的基础。
1. Forces and Motion | 力与运动
Force: A push or pull that can change an object's speed, direction or shape. It is measured in newtons (N). Think of force as any 'nudge' you give a football.
力：能改变物体速度、方向或形状的推或拉，单位是牛顿 (N)。可以把力想象成你给足球的每一次“轻推”。
Mass: The amount of matter in an object, measured in kilograms (kg). Mass does not change, whether you are on Earth, the Moon or floating in space.
质量：物体所含物质的多少，单位是千克 (kg)。无论你在地球、月球还是太空漂浮，质量都不会改变。
Weight: The force of gravity pulling on a mass. It is calculated by Weight = mass × gravitational field strength (W = m × g). On Earth, g ≈ 10 N/kg, so a 5 kg mass has a weight of about 50 N.
重量：重力对质量施加的拉力。计算公式为 重量 = 质量 × 重力场强度 (W = m × g)。地球表面 g 约等于 10 牛/千克，所以 5 千克的物体重量约 50 牛。
W = m × g
Friction: A force that opposes motion when two surfaces rub together. It can be useful (e.g. car tyres gripping the road) or unwanted (e.g. engine parts wearing down).
摩擦力：两个表面相互摩擦时阻碍运动的力。它可能是有益的（如汽车轮胎抓地），也可能是不利的（如发动机部件磨损）。
Acceleration: The rate at which velocity changes. An object accelerates if it speeds up, slows down (deceleration) or changes direction. The formula is a = Δv ÷ t, where Δv is change in velocity and t is time taken.
加速度：速度变化的快慢。物体加速、减速或改变方向都属于加速度。公式为 a = Δv ÷ t，Δv 是速度变化量，t 是时间。
a = Δv ÷ t
Resultant force: The single force that has the same effect as all the forces acting on an object combined. If resultant force is zero, the object stays at rest or moves at constant speed.
合力：与物体受到的所有力共同效果相同的那个单独的力。若合力为零，物体将保持静止或匀速直线运动。
Newton's First Law: An object remains at rest or moves with constant velocity unless acted on by a resultant force. This is why seatbelts are needed – your body wants to keep moving forward when the car stops suddenly.
牛顿第一定律：除非受到合外力的作用，物体将保持静止或匀速直线运动状态。这就是为什么需要安全带——当汽车突然停下时，你的身体会试图继续向前运动。
2. Energy Stores and Transfers | 能量储存与转移
Energy store: A way of describing where energy is kept. The main stores are kinetic (movement), gravitational potential (height), elastic potential (stretched or squashed), thermal (internal heat), chemical (fuel, food) and nuclear.
能量储存：描述能量存放的方式。主要的储存形式有动能（运动）、重力势能（高度）、弹性势能（拉伸或压缩）、热内能（内部热量）、化学能（燃料、食物）和核能。
Kinetic energy (Eₖ): Energy an object has because it is moving. The formula is Eₖ = ½ m v². Notice that speed is squared, so doubling speed quadruples the kinetic energy.
动能 (Eₖ)：物体因运动而具有的能量。公式为 Eₖ = ½ m v²。注意速度是平方项，所以速度加倍会使动能变为原来的四倍。
Eₖ = ½ m v²
Gravitational potential energy (Eₚ): Energy stored in an object raised above the ground. Eₚ = m g h, where h is height. The higher you lift something, the more GPE it gains.
重力势能 (Eₚ)：物体因被举高而储存的能量。Eₚ = m g h，h 为高度。物体被举得越高，获得的重力势能就越多。
Eₚ = m g h
Conservation of energy: Energy cannot be created or destroyed, only transferred between stores or dissipated (spread out) to the surroundings. The total energy before a transfer always equals the total energy after.
能量守恒：能量既不会凭空产生也不会凭空消失，只能从一个储存转移到另一个储存，或耗散（散开）到周围环境中。转移前后总能量总是相等的。
Power: The rate at which energy is transferred, or the rate of doing work. Measured in watts (W). P = E ÷ t. A powerful appliance transfers more energy each second.
功率：能量转移或做功的快慢，单位是瓦特 (W)。P = E ÷ t。大功率电器每秒钟转移的能量更多。
P = E ÷ t
Work done the direction of the force (m). This is exactly the same amount as the energy transferred.
做功：力使物体发生移动时，能量被转移。做功 (J) = 力 (N) × 沿力方向移动的距离 (m)。做功的数值与转移的能量完全相同。
3. Waves: Sound and Light | 波：声与光
Wavelength (λ): The distance between two identical points on consecutive waves, such as crest to crest. Measured in metres. Imagine measuring the length of one complete ripple.
波长 (λ)：相邻两个波上相同点之间的距离，例如波峰到波峰，单位是米。想象测量一个完整涟漪的长度。
Amplitude: The maximum displacement of a point on the wave from its rest position. Greater amplitude means louder sound or brighter light – it carries more energy.
振幅：波上的点偏离平衡位置的最大距离。振幅越大，声音越响或光越亮——说明波携带的能量越多。
Frequency: The number of complete waves passing a point per second. Measured in hertz (Hz). Sound with high frequency sounds high-pitched. The relationship with period T is f = 1 ÷ T.
频率：每秒钟通过某点的完整波的个数，单位是赫兹 (Hz)。频率高的声音听起来音调高。频率与周期 T 的关系为 f = 1 ÷ T。
Transverse wave: A wave where the oscillations are perpendicular (at right angles) to the direction of energy transfer. Light and water waves are transverse. Think of flicking a skipping rope – the wave moves forward, but the rope moves up and down.
横波：振动方向与能量传递方向垂直的波。光波和水波都是横波。想象抖动跳绳——波形向前，但绳子上下移动。
Longitudinal wave: A wave where the oscillations are parallel to the direction of energy transfer. Sound waves in air are longitudinal. The compressions and rarefactions push forward like a slinky being squeezed and released.
纵波：振动方向与能量传递方向平行的波。空气中的声波是纵波。疏密部向前推进，就像压缩又释放的弹簧玩具。
Reflection: The bouncing back of a wave when it hits a boundary. The angle of incidence equals the angle of reflection. Mirrors reflect light; echoes reflect sound.
反射：波遇到边界时被弹回的现象。入射角等于反射角。镜面反射光；回声反射声波。
Refraction: The bending of a wave as it passes from one medium to another due to a change in speed. A straw looks bent in water because light changes speed at the water-air boundary.
折射：波从一种介质进入另一种介质时因速度改变而发生的弯曲。吸管在水中看起来像是折断了，因为光在水-空气边界速度改变。
4. Electricity and Circuits | 电与电路
Current (I): The flow of electric charge. In a metal wire, it is the movement of electrons. Measured in amperes (A). Current flows from the positive terminal to the negative, though electrons move the opposite way.
电流 (I)：电荷的定向流动。在金属导线中，是电子的移动。单位是安培 (A)。电流从正极流向负极，但电子实际运动方向相反。
Voltage (potential difference, V): The energy transferred per unit of charge. It is the 'push' that drives current around a circuit. Measured in volts (V). A battery provides a constant voltage.
电压（电位差，V）：单位电荷转移的能量。它是驱动电流在回路中流动的“推力”，单位是伏特 (V)。电池提供恒定电压。
Resistance (R): A measure of how difficult it is for current to flow. Resistance is measured in ohms (Ω). Ohm's Law states V = I × R. Long, thin wires have higher resistance.
电阻 (R)：衡量电流流动难易程度的物理量，单位是欧姆 (Ω)。欧姆定律指出 V = I × R。又长又细的导线电阻较大。
V = I × R
Series circuit: A circuit where components are connected one after the other, forming a single loop. Current is the same everywhere, but voltage is shared. If one bulb fails, all go out.
串联电路：各元件依次相连，形成单一回路的电路。电流处处相等，但电压被分担。如果一个灯泡熄灭，所有灯都会熄灭。
Parallel circuit: A circuit where components are connected on separate branches. Voltage is the same across each branch, but current is split. A failure in one branch does not stop the others.
并联电路：各元件连接在独立支路上的电路。各支路电压相等，但电流被分流。一条支路断路不影响其他支路工作。
Conductor vs Insulator: A conductor lets charge flow easily (metals, graphite). An insulator resists charge flow (plastic, rubber). Think of copper as a motorway for electrons; rubber as a wall.
导体与绝缘体：导体容易让电荷通过（金属、石墨），绝缘体则阻碍电荷流动（塑料、橡胶）。把铜想象成电子的高速公路，橡胶则是一堵墙。
5. Magnetism and Electromagnetism | 磁与电磁
Magnetic field: The region around a magnet where a magnetic force is felt. Field lines run from the north pole to the south pole. The closer the lines, the stronger the field.
磁场：磁体周围能感受到磁力的区域。磁感线从北极指向南极。线越密，磁场越强。
Poles: Every magnet has a north and a south pole. Like poles repel; unlike poles attract. Splitting a magnet always produces two smaller magnets, each with a north and south pole.
磁极：每个磁体都有北极和南极。同名极相斥，异名极相吸。把一块磁铁分成两半，总是得到两块小磁铁，每块都有南北极。
Electromagnet: A temporary magnet made by passing an electric current through a coil of wire, often wrapped around an iron core. The magnetism can be switched on and off and made stronger by increasing current or adding more turns.
电磁铁：通过给线圈通电而制成的临时磁体，线圈常缠绕在铁芯上。磁性可以开关，通过增大电流或增加线圈匝数可以增强磁性。
Solenoid: A long coil of wire that produces a uniform magnetic field when current passes through it. It is the backbone of many electromagnets and relays.
螺线管：通入电流后能产生均匀磁场的长线圈。它是许多电磁铁和继电器的基础。
Permanent magnet vs induced magnet: A permanent magnet produces its own magnetic field all the time (e.g. a fridge magnet). An induced magnet becomes magnetic only when placed inside a magnetic field and loses most magnetism when removed.
永磁体与暂磁体：永磁体始终产生自己的磁场（如冰箱磁贴）。暂磁体只有放在磁场中才表现出磁性，移开后磁性基本消失。
6. Particle Model of Matter | 物质粒子模型
Solid: Particles are tightly packed in a fixed, regular arrangement. They vibrate in place. Solids have a definite shape and volume. Think of a rigid grid of tiny balls.
固体：粒子紧密排列，位置固定且规则，只能在原地振动。固体有确定的形状和体积。想象成一个牢固的小球网格。
Liquid: Particles are close together but can slide past each other. Liquids take the shape of their container but keep the same volume. The particle arrangement is like a crowd that can flow.
液体：粒子彼此靠近但可相互滑动。液体随容器形状变化，但体积不变。粒子排列就像可以流动的人群。
Gas: Particles are far apart and move rapidly in all directions. Gases fill their container completely and can be compressed easily. The
Published by TutorHao | Year 8 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