📚 Year 9 CIE Science: Quick Vocabulary Memorisation Guide | Year 9 CIE 科学：词汇术语速记指南
Mastering scientific vocabulary is your key to unlocking deeper understanding in Biology, Chemistry and Physics. In the Year 9 CIE science curriculum, new terms appear in every topic, and being able to recall them confidently not only boosts your exam performance but also helps you speak and write like a true scientist. This guide collects the essential words, teaches you how to break them down, and shares memory shortcuts that make revision active and enjoyable.
掌握科学词汇是打开生物、化学和物理深层理解之门的钥匙。在 Year 9 CIE 科学课程中，每个主题都会出现新术语，能够自信地回忆它们不仅能提升考试成绩，还能帮助你像真正的科学家一样表达和写作。本指南汇集了核心词汇，教你如何分解它们，并分享让复习变得主动且有趣的记忆捷径。
1. Why Memorise Science Vocabulary? | 为什么要记忆科学词汇？
Scientific vocabulary is the precise language used to describe observations, patterns and explanations. Without a secure grasp of terms like ‘osmosis’ or ‘kinetic energy’, it becomes difficult to follow lessons, interpret questions and write accurate answers. Examiners expect you to use the correct terminology, not vague everyday words.
科学词汇是用来描述观察、规律和解释的精确语言。如果对“渗透”或“动能”等术语没有牢固掌握，就很难跟上课堂进度、理解题目并写出准确答案。考官期待你使用正确的术语，而不是模糊的日常用语。
The best approach is to treat vocabulary learning as part of your active revision, not a separate chore. When you link a new word to its root meaning, draw a diagram or say it aloud, you build strong memories. Making flashcards with the term on one side and a straightforward definition with an example on the other is a proven technique.
最好的方法是将词汇学习视为主动复习的一部分，而不是一项单独的任务。当你将新单词与它的词根含义联系起来、画出图表或大声朗读时，你就能建立起牢固的记忆。在一面写上术语，另一面写上简单定义和例子的闪卡是一种被验证有效的技巧。
2. Word Roots and Affixes – The Memory Shortcut | 词根词缀——记忆捷径
Many scientific terms are built from Greek and Latin roots. Once you recognise these building blocks, you can decode unfamiliar words. For example, ‘photo-‘ means light, so ‘photosynthesis’ is ‘putting together with light’. ‘Bio-‘ means life, ‘therm-‘ means heat, and ‘-logy’ means the study of something. Spotting these parts turns long words into manageable chunks.
许多科学术语由希腊语和拉丁语词根构成。一旦你认识这些构词块，就能解读不熟悉的单词。例如，“photo-”表示光，因此“photosynthesis”（光合作用）就是“用光来合成”。“bio-”表示生命，“therm-”表示热，“-logy”表示对某事物的研究。识别这些部件可以将长单词变成可管理的组块。
Start a root-word collection in your notebook. Every time you meet a new term, underline the prefix or suffix. Below is a table of common roots you will encounter in Year 9 science. Refer to it whenever you are stuck.
在你的笔记本上开始收集词根词缀。每次遇到新术语时，划出前缀或后缀。下面是你将在 Year 9 科学中遇到的常见词根表。遇到困难时可以参考它。
| Root / Affix (词根/词缀) | Meaning (含义) | Example (示例) |
|---|---|---|
| photo- | light (光) | photosynthesis (光合作用) |
| -synthesis | putting together (合成) | chemosynthesis (化学合成) |
| chloro- | green (绿) | chloroplast (叶绿体) |
| cyto- / -cyte | cell (细胞) | cytoplasm (细胞质) |
| endo- / exo- | inside / outside (内/外) | endothermic (吸热的) |
| therm- | heat (热) | thermometer (温度计) |
| aqua- / hydro- | water (水) | aqueous (水溶液的) |
| -osis | process / condition (过程/状态) | osmosis (渗透) |
3. Biology Vocabulary: Cells and Life Processes | 生物词汇：细胞与生命过程
The cell is the smallest unit of life. Key organelles include the nucleus, which controls activities, mitochondria where respiration happens, and chloroplasts that capture light energy in plants. Remember: ‘mitochondrion’ (singular) and ‘mitochondria’ (plural); getting plurals right shows attention to detail.
细胞是生命的最小单位。关键的细胞器包括控制活动的细胞核、发生呼吸作用的线粒体以及植物中捕获光能的叶绿体。记住：“mitochondrion”是单数形式，“mitochondria”是复数形式；正确使用复数能体现对细节的关注。
Diffusion is the net movement of particles from a region of higher concentration to a region of lower concentration, down a concentration gradient. Osmosis is a special case: the diffusion of water molecules through a partially permeable membrane. Using the phrase ‘water moves from high water potential to low water potential’ will help you earn full marks.
扩散是粒子从高浓度区域向低浓度区域的净移动，沿着浓度梯度进行。渗透是一个特例：水分子通过部分透性膜的扩散。使用“水从高水势向低水势移动”这个表述能帮助你获得满分。
Photosynthesis is described by the word equation: carbon dioxide + water → glucose + oxygen, in the presence of light and chlorophyll. Memorise the balanced symbol equation as well: 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂. Respiration, which releases energy, is essentially the reverse: glucose + oxygen → carbon dioxide + water (+ energy).
光合作用用文字方程式描述：二氧化碳 + 水 → 葡萄糖 + 氧气，在有光和叶绿素的条件下。同时记住平衡的符号方程式：6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂。释放能量的呼吸作用基本上是逆反应：葡萄糖 + 氧气 → 二氧化碳 + 水（+ 能量）。
4. Chemistry Vocabulary: Substances and Reactions | 化学词汇：物质与反应
Everything you touch is made from elements, compounds or mixtures. An element contains only one type of atom. A compound is a substance formed when two or more different elements are chemically bonded together. A mixture consists of two or more substances not chemically combined, so they can be separated by physical techniques like filtration or distillation.
你接触的一切都是由元素、化合物或混合物组成的。元素只包含一种原子。化合物是由两种或多种不同元素通过化学键结合形成的物质。混合物由两种或多种未发生化学结合的物质组成，因此可以通过过滤或蒸馏等物理技术进行分离。
Acids, alkalis and the pH scale appear regularly. An acid releases hydrogen ions (H⁺) in aqueous solution, while an alkali releases hydroxide ions (OH⁻). Neutralisation is the reaction between an acid and a base to form a salt and water. General equation: acid + base → salt + water. For instance, hydrochloric acid + sodium hydroxide → sodium chloride + water (HCl + NaOH → NaCl + H₂O).
酸、碱和pH标度经常出现。酸在水溶液中释放氢离子（H⁺），而碱释放氢氧根离子（OH⁻）。中和是酸与碱反应生成盐和水的过程。一般方程式：酸 + 碱 → 盐 + 水。例如，盐酸 + 氢氧化钠 → 氯化钠 + 水 (HCl + NaOH → NaCl + H₂O)。
The terms ‘atom’, ‘molecule’ and ‘ion’ need clear separation. An atom is the smallest neutral particle of an element. A molecule is a group of two or more atoms chemically bonded, e.g. O₂ or H₂O. An ion is a charged particle formed when an atom gains or loses electrons. So Na⁺ is a positive ion (cation), Cl⁻ is a negative ion (anion).
“原子”、“分子”和“离子”这些术语需要清晰区分。原子是元素最小的中性粒子。分子是由两个或多个原子通过化学键结合组成的群体，例如 O₂ 或 H₂O。离子是原子获得或失去电子时形成的带电粒子。因此 Na⁺ 是阳离子，Cl⁻ 是阴离子。
5. Physics Vocabulary: Forces and Energy | 物理词汇：力与能量
A force is a push or a pull that can change an object’s speed, shape or direction. Weight is the force of gravity acting on an object’s mass, so weight (N) = mass (kg) × gravitational field strength (N/kg). Do not confuse mass (measured in kilograms) with weight (measured in newtons): mass stays the same everywhere; weight changes with location.
力是能改变物体速度、形状或方向的推或拉。重量是作用在物体质量上的重力，因此重量（N）= 质量（kg）× 重力场强度（N/kg）。不要混淆质量（以千克为单位）和重量（以牛顿为单位）：质量在任何地方都保持不变；重量随位置变化。
Energy exists in different stores: kinetic energy (movement), gravitational potential energy (height), elastic potential energy (stretched springs), thermal energy (heat) and chemical energy (fuels and food). The principle of conservation of energy states that energy cannot be created or destroyed, only transferred or transformed. When you rub your hands, mechanical work is transferred into thermal energy.
能量存在于不同的储存类型中：动能（运动）、重力势能（高度）、弹性势能（拉伸的弹簧）、热能（热量）和化学能（燃料和食物）。能量守恒原理指出，能量不能被创造或消灭，只能被转移或转化。当你搓手时，机械功转化为热能。
Common physics equations you must recognise include speed = distance ÷ time, and kinetic energy = ½ × mass × (speed)². Using symbols: KE = ½mv². Remember that speed squared means the speed multiplied by itself; a small increase in speed causes a large rise in kinetic energy.
你必须认识常见的物理方程式，包括 速度 = 距离 ÷ 时间，以及 动能 = ½ × 质量 × (速度)²。使用符号表示为：KE = ½mv²。记住速度的平方意为速度自乘；速度的小幅增加会导致动能大幅上升。
6. Experimental and Measurement Terms | 实验与测量术语
In every investigation, you need to identify the independent variable (the one you change), the dependent variable (the one you measure) and control variables (the ones you keep constant to make the test fair). Using these words correctly in your planning earns high marks for scientific communication.
在每次探究中，你需要识别自变量（你改变的那个）、因变量（你测量的那个）以及控制变量（你保持不变以确保测试公平的那个）。在实验设计中正确使用这些词汇能为科学交流赢得高分。
Precision is about how closely repeated measurements agree with each other, while accuracy is about how close a measurement is to the true value. A thermometer with a scale marked every 0.1°C can give precise readings, but if it is not calibrated properly, those readings may not be accurate. Learn the names of common apparatus: beaker, conical flask, measuring cylinder, Bunsen burner, tripod and gauze.
精确度是指重复测量值之间的相互接近程度，而准确度是指测量值与真实值的接近程度。一支刻度为每 0.1°C 的温度计可以提供精确的读数，但如果该温度计未正确校准，这些读数可能不准确。学会常见仪器的名称：烧杯、锥形瓶、量筒、本生灯、三脚架和石棉网。
7. Commonly Confused Terms | 易混淆术语辨析
Some word pairs trick even hardworking students. Use this table to nail the differences and avoid losing easy marks.
有些词汇组合连用功的学生也会搞错。使用这张表格把差异刻在脑中，避免丢失简单的分数。
| Science Pair | Key Difference | 中文辨析 |
|---|---|---|
| Mass vs Weight | Mass is the amount of matter (kg); weight is a force (N). | 质量是物质的量；重量是一种力。 |
| Heat vs Temperature | Heat is thermal energy transfer; temperature tells how hot or cold something is. | 热量是能量的传递；温度表明冷热程度。 |
| Diffusion vs Osmosis | Osmosis always involves water through a partially permeable membrane. | 渗透特指水通过部分透性膜。 |
| Element vs Compound | An element has one type of atom; a compound has two or more chemically combined. | 元素只有一种原子；化合物是两种或多种元素化学结合。 |
| Atom vs Molecule | An atom is the smallest unit of an element; a molecule is a bonded group of atoms. | 原子是元素的最小单元；分子是键合原子团。 |
| Solvent vs Solute vs Solution | Solute dissolves; solvent does the dissolving; the mixture is the solution. | 溶质被溶解；溶剂执行溶解；混合物为溶液。 |
8. Using Acronyms and Mnemonics | 利用首字母缩略词和助记符
Mnemonics turn a list of information into something memorable and sometimes funny. For the seven life processes, use ‘MRS GREN’: Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion and Nutrition. Practise saying it while pointing to each letter – your brain links sound, movement and meaning.
助记符将一列信息转化为易记甚至有趣的内容。对于生命七过程，使用“MRS GREN”：运动、呼吸、感应、生长、繁殖、排泄和营养。练习边指每个字母边大声念出来——大脑会将声音、动作和意义联系起来。
In chemistry, remember ‘OIL RIG’ for redox reactions: Oxidation Is Loss (of electrons), Reduction Is Gain (of electrons). For the reactivity series, a classic mnemonic is ‘Please Stop Calling My Aunt Zelda, I’m Learning Chemistry’ – potassium, sodium, calcium, magnesium, aluminium, zinc, iron, lead, copper. Create your own version; it sticks better when it is personalised.
在化学中，记住“OIL RIG”表示氧化还原反应：氧化是失去电子，还原是得到电子。对于金属活动性顺序，一个经典的助记句是“Please Stop Calling My Aunt Zelda, I’m Learning Chemistry”——钾、钠、钙、镁、铝、锌、铁、铅、铜。创造你自己的版本；个性化之后会记得更牢。
9. Visual and Contextual Learning | 视觉与语境学习
Your brain remembers images far more easily than abstract words. Draw a simple diagram next to each vocabulary card: a cell with labels, a picture of particles moving from high to low concentration, or a force diagram. Even a rough sketch anchors the term in your visual memory.
你的大脑记忆图像远比记忆抽象单词容易得多。在每张词汇卡旁边画一个简图：带标签的细胞、粒子从高浓度向低浓度移动的图片，或受力分析图。即使一幅粗略的草图也能把术语锚定在你的视觉记忆中。
Equally powerful is using the term in a real sentence. Instead of writing ‘osmosis – water movement’, write ‘The plant roots take up water by osmosis from the soil.’ The context helps you recall the definition and the correct spelling. Reading your textbook paragraphs aloud also reinforces pronunciation and fluency.
同样有效的是在真实句子中使用术语。与其写“渗透——水运动”，不如写“植物根部通过渗透作用从土壤中吸收水分”。语境能帮助你回忆定义和正确拼写。大声朗读教科书段落也能强化发音和流利度。
10. Self-Testing and Active Recall | 自我测试与主动回忆
Simply rereading notes creates a false sense of mastery. Active recall – testing yourself without looking – strengthens memory far more efficiently. Cover the definition side of your flashcard, say the answer out loud, then check. If you hesitate, put that card in a ‘review again’ pile.
单纯重读笔记会产生虚假的掌握感。主动回忆——在不看答案的情况下自测——能更有效地巩固记忆。遮住闪卡的定义面，大声说出答案，然后检查。如果你犹豫了，就把那张卡放进“再复习”堆。
Challenge yourself with mini quizzes: write down five terms from memory, label a blank diagram, or explain a concept to a family member as if you were the teacher. When you can teach it clearly, you truly know it. Give yourself a vocabulary test before each topic test – even a 5‑minute warm‑up raises your performance.
用小型测验挑战自己：凭记忆写出五个术语，为空白图标注名称，或者像老师一样向家人解释一个概念。当你能清晰地讲授它时，你就真正掌握了。在每个主题测试前给自己安排一次词汇小测——即使是5分钟的热身也能提升你的表现。
11. Common Spelling and Pronunciation Pitfalls | 常见的拼写与发音陷阱
Misspelling scientific words can lose marks even if your understanding is correct. ‘Photosynthesis’ is often misspelled as ‘photosythesis’; break it into photo-syn-the-sis. ‘Respiration’ can trap you into writing ‘resperation’ – say ‘res-pi-ra-tion’ slowly. ‘Alkali’ is not ‘alkaline’ unless you mean the adjective; the substance is an alkali, and it has alkaline properties.
拼错科学单词会丢分，即使你的理解是正确的。“Photosynthesis”常被拼成“photosythesis”；把它拆成 photo-syn-the-sis。“Respiration”可能让你误写成“resperation”——慢说 res-pi-ra-tion。“Alkali”不是“alkaline”，除非你指的是形容词；物质是 alkali，它具有 alkaline 性质。
Pronunciation also matters: ‘nucleus’ is /ˈnjuːkliəs/, not ‘nuculus’; ‘chloroplast’ has a hard ‘k’ sound, /ˈklɔːrəplæst/. Practise saying the words during revision; your ear will catch errors before your pen does. Record yourself on your phone and listen back – it is a quick way to spot wobbles.
发音也很重要：“nucleus”读作 /ˈnjuːkliəs/，不是“nuculus”；“chloroplast”有一个清晰的/k/音，/ˈklɔːrəplæst/。复习时练习读这些词；你的耳朵会比笔更早发现错误。用手机录下自己的发音并回听——这是快速发现卡顿的方法。
12. Quick Reference Glossary | 快速参考词汇表
Here is a compact glossary of core Year 9 CIE science terms. Use it for last‑minute revision or to kick-start your flashcard collection. Read the English definition, say the Chinese equivalent, then cover and test yourself.
这是一份 Year 9 CIE 科学核心术语的紧凑词汇表。用于考前最后一分钟复习，或启动你的闪卡收集。先读英文定义，说出中文对应词，然后遮盖并自我测试。
| Term | Definition | 中文 |
|---|---|---|
| Cell membrane | Partially permeable barrier controlling what enters and leaves the cell | 细胞膜 |
| Nucleus | Organelle containing genetic material (DNA) | 细胞核 |
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