Year 9 OCR Science: Vocabulary & Terminology Quick Recall Guide | Year 9 OCR 科学：词汇术语速记指南

📚 Year 9 OCR Science: Vocabulary & Terminology Quick Recall Guide | Year 9 OCR 科学：词汇术语速记指南

Scientific vocabulary can feel like a foreign language, but it is the gateway to understanding key concepts in Year 9 OCR Science. This guide breaks down essential terms from biology, chemistry, and physics and teaches you how to remember them quickly using word roots, mnemonics, and clever associations. With regular practice and the techniques shared here, you will move from memorising definitions to truly understanding and applying the language of science.

科学词汇可能像一门外语，但它是理解 Year 9 OCR 科学关键概念的门户。本指南拆解生物、化学和物理中的重要术语，并教你如何利用词根、记忆术和巧妙的联想快速记住它们。通过定期练习和本文分享的技巧，你将从死记硬背定义转变为真正理解和运用科学语言。

1. The Power of Mastering Scientific Vocabulary | 掌握科学词汇的力量

Strong vocabulary skills do more than help you pass a spelling test — they sharpen your ability to describe observations, write precise explanations, and interpret exam questions accurately. In OCR Science, many marks are awarded for using correct terminology in context, from labelling a cell diagram to explaining why a bungee jumper accelerates downwards.

扎实的词汇技能不止帮你通过拼写测试——它还能提升你描述观察、撰写精准解释和准确解读考题的能力。在 OCR 科学中，许多分数都是通过在上下文中使用正确术语获得的，无论是标注细胞图还是解释蹦极者为何向下加速。

2. Deconstructing Words: Prefixes, Suffixes & Roots | 拆解单词：前缀、后缀和词根

Many scientific terms can be cracked open like a puzzle. The suffix '-ology' means 'the study of', so 'biology' is the study of life. 'Geo-' means Earth, giving 'geology' as the study of the Earth.

许多科学术语可以像拼图一样拆解。后缀 '-ology' 意为 '……学'，因此 'biology' 是研究生命的学科。'Geo-' 表示地球，于是 'geology' 就是研究地球的学科。

Prefixes like 'photo-' (light) and 'therm-' (heat) appear in 'photosynthesis' and 'thermal'. 'Micro-' signals something tiny (microscope), while 'macro-' points to something large (macromolecule).

前缀如 'photo-'（光）和 'therm-'（热）出现在 'photosynthesis'（光合作用）和 'thermal'（热）中。'Micro-' 表示微小（显微镜），而 'macro-' 指向大（大分子）。

Watch out for 'a-' or 'an-' at the start of a word, which often means 'without' — 'anaerobic' means without oxygen. 'Hyper-' means above normal and 'hypo-' means below normal, as seen in 'hypertonic' and 'hypotonic' solutions.

注意词首的 'a-' 或 'an-'，常意为 '无'——'anaerobic'（厌氧）就是无氧。'Hyper-' 意为高于正常，'hypo-' 意为低于正常，就像 'hypertonic'（高渗）和 'hypotonic'（低渗）溶液中见到的那样。

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3. Biology: Cells & Life Processes | 生物：细胞和生命过程

The seven life processes can be recalled with the mnemonic 'MRS GREN': Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, Nutrition. This simple sentence helps you tick every requirement when asked to justify if something is alive.

七大生命过程可以用 "MRS GREN" 口诀回忆：运动、呼吸、感应、生长、生殖、排泄、营养。这个简单的句子能帮你核对每一项要求，在需要判断某物是否具有生命时尤其有用。

In cells, 'photosynthesis' is the process by which plants make glucose and oxygen from carbon dioxide and water using light energy. Think of it as 'photo' (light) + 'synthesis' (putting together). The reverse process, 'respiration', releases energy from glucose — remember it occurs in the 'mitochondria' (the cell's powerhouses).

在细胞中，'photosynthesis'（光合作用）是植物利用光能将二氧化碳和水转化为葡萄糖和氧气的过程。可以想成 'photo'（光）+ 'synthesis'（合成）。相反的过程，'respiration'（呼吸作用），从葡萄糖中释放能量——记住它发生在 'mitochondria'（线粒体，细胞的能量工厂）。

'Diffusion' is the net movement of particles from high to low concentration, while 'osmosis' is the movement of water across a partially permeable membrane. A handy trick: 'diffusion' sounds like 'confusion' — particles spread out everywhere, and 'osmosis' stays with 'O' for 'H₂O'.

'Diffusion'（扩散）是粒子从高浓度向低浓度的净移动，而 'osmosis'（渗透）是水分子通过半透膜的运动。一个巧记方法：'diffusion' 听起来像 'confusion'——粒子散得到处都是；而 'osmosis' 中有 'O'，代表 H₂O。

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4. Biology: Organisms & Ecosystems | 生物：生物体和生态系统

In a food chain, the 'producer' (usually a green plant) converts light energy into chemical energy. 'Consumers' eat other organisms; the first consumer is a 'primary consumer'. To distinguish a 'food chain' from a 'food web', imagine a single chain necklace versus a woven web with many interconnected strands.

在食物链中，'producer'（生产者，通常是绿色植物）将光能转化为化学能。'Consumers'（消费者）吃其他生物；第一个消费者是 'primary consumer'（初级消费者）。要区分 'food chain'（食物链）和 'food web'（食物网），可以想象一条单独的链式项链和一个由许多相互连接的线编织成的网。

A 'habitat' is where an organism lives, while a 'niche' describes its role — what it does there. For example, a rabbit's habitat is a meadow, but its niche is a grazer that also serves as prey for foxes. The word 'population' refers to all the organisms of the same species in one area; 'community' is all the different populations living together.

'Habitat'（栖息地）是生物生活的地方，而 'niche'（生态位）描述其角色——它在那里做什么。例如，兔子的栖息地是草地，但其生态位是食草动物，同时也是狐狸的猎物。'Population'（种群）指同一区域内同一物种的所有个体；'community'（群落）是所有不同种群共同生活在一起。

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5. Chemistry: Atomic Structure & Periodic Table | 化学：原子结构和元素周期表

An 'atom' in a chemical reaction, made of protons, neutrons and electrons. Remember the charges with 'proton = positive' (both start with P) and 'neutron = neutral' (both start with N). Electrons are negatively charged and orbit the nucleus in shells.

'Atom'（原子）是能参与化学反应的元素最小部分，由质子、中子和电子组成。用 'proton' 和 'positive' 都以 P 开头来记质子带正电，'neutron' 和 'neutral' 都以 N 开头来记中子不带电。电子带负电，以分层形式绕核运动。

A pure 'element' contains only one type of atom (e.g., gold, oxygen). A 'compound' contains two or more different elements chemically bonded (e.g., H₂O). A 'mixture' is different substances not chemically joined — their properties remain separate. Think of a compound as a cake (ingredients bonded together) and a mixture as a fruit salad (pieces still recognisable).

纯的 'element'（元素）只含一种原子（如金、氧气）。'Compound'（化合物）含有两种或以上不同元素通过化学键结合（如 H₂O）。'Mixture'（混合物）是不同的物质没有经过化学结合——它们的性质保持独立。把化合物想象成蛋糕（原料结合在一起），混合物想象成水果沙拉（各块仍可辨认）。

The 'periodic table' arranges elements by 'atomic number' (number of protons). 'Mass number' is protons plus neutrons. To recall mass number, link 'mass' to 'massive' — it includes both heavy particles, protons and neutrons.

'Periodic table'（元素周期表）根据 'atomic number'（原子序数，即质子数）排列元素。'Mass number'（质量数）是质子加中子。记忆质量数时，联系 'mass' 和 'massive'（巨大的）——它包含了质子和中子这两种较重的粒子。

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6. Chemistry: Chemical Reactions, Acids & Bases | 化学：化学反应、酸和碱

In a reaction, 'reactants' turn into 'products'. A quick visual: reactants → products. The arrow can remind you of a one-way traffic sign — the process goes forward. Word equations help: 'calcium carbonate → calcium oxide + carbon dioxide' can be written as CaCO₃ → CaO + CO₂.

在反应中，'reactants'（反应物）变成 'products'（生成物）。一个快速视觉：反应物 → 生成物。箭头可以提醒你这是个单行线——过程向前进行。文字方程式会很有帮助：'碳酸钙 → 氧化钙 + 二氧化碳' 可以写成 CaCO₃ → CaO + CO₂。

Exothermic reactions release heat ('exo-' means 'out', like exit). Endothermic reactions absorb heat ('endo-' means 'inside' warmer is exothermic; an ice pack dissolving ammonium nitrate is endothermic. For bonding, 'ionic' occurs between a metal and a non-metal where electrons are transferred, while 'covalent' involves sharing electrons between non-metals. Recall 'Ionic = I give/take' and 'Covalent = Co-operate by sharing'.

放热反应（exothermic）释放热量（'exo-' 意为 '外出'，如 exit）。吸热反应（endothermic）吸收热量（'endo-' 意为 '内部'）。暖手宝是放热的；冰袋溶解硝酸铵是吸热的。在成键方面，'ionic'（离子键）发生在金属和非金属之间，电子发生转移；而 'covalent'（共价键）涉及非金属之间共用电子。记住 'Ionic = I give/take'（我给/拿），'Covalent = Co-operate by sharing'（合作共用）。

er. The classic example: hydrochloric acid + sodium hydroxide → sodium chloride + water, or HCl + NaOH → NaCl + H₂O.

酸的 pH 小于 7；碱（可溶性碱）的 pH 大于 7。中和反应是酸和碱反应生成盐和水。经典例子：盐酸 + 氢氧化钠 → 氯化钠 + 水，即 HCl + NaOH → NaCl + H₂O。

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7. Physics: Forces & Motion | 物理：力和运动

'Mass' is the amount of matter in an object, measured in kilograms (kg). 'Weight' is the force due to gravity, measured in newtons (N). The formula connecting them is central:

Weight (N) = mass (kg) × gravitational field strength (N/kg)

On Earth, g ≈ 10 N/kg, so remember your weight is 10 times your mass.

'Mass'（质量）是物体所含物质的量，以千克（kg）为单位。'Weight'（重量）是由于重力而产生的力，以牛顿（N）为单位。连接它们的公式是核心：

Weight (N) = mass (kg) × gravitational field strength (N/kg)

在地球上，g ≈ 10 N/kg，所以记住你的重量大约是质量的10倍。

Velocity differs from speed because it includes direction. Acceleration is any change in velocity; it can be speeding up, slowing down or changing direction. The equation for average acceleration is

acceleration (m/s²) = change in velocity (m/s) ÷ time taken (s)

Think of a sports car ad — they boast about '0 to 60 mph in 4 seconds', which is a description of acceleration.

速度（velocity）与速率（speed）不同，因为它包含方向。加速度（acceleration）是速度的任何变化；可以是加速、减速或改变方向。平均加速度的公式是

acceleration (m/s²) = change in velocity (m/s) ÷ time taken (s)

想想跑车广告——他们吹嘘 '0 到 60 英里/小时只需 4 秒'，这就是对加速度的描述。

'Resultant force' is the overall force acting on an object. If forces are balanced, resultant force is zero and there is no change in motion (Newton’s First Law). A non-zero resultant force causes acceleration (Newton’s Second Law). Friction always opposes motion and often turns kinetic energy into thermal energy.

'Resultant force'（合力）是作用在物体上的总力。如果力平衡，合力为零，运动状态不变（牛顿第一定律）。非零合力产生加速度（牛顿第二定律）。摩擦力总是阻碍运动，常将动能转化为热能。

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8. Physics: Energy Resources & Electricity | 物理：能源和电

Energy comes in many stores: kinetic, gravitational potential, elastic potential, thermal, chemical, nuclear and magnetic. Kinetic energy depends on mass and velocity:

KE = ½ × mass × velocity²

Notice that doubling the speed quadruples the kinetic energy — an important relationship for car stopping distances.

能量有多种储存形式：动能、重力势能、弹性势能、热能、化学能、核能和磁能。动能取决于质量和速度：

KE = ½ × mass × velocity²

注意，速度加倍会使动能变为原来的四倍——这对汽车制动距离而言是一个重要的关系。

In electricity, 'current' (I) is the flow of electric charge

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