📚 Year 9 CAIE Science: Vocabulary & Terminology Quick-Memorisation Guide | 九年级CAIE科学：词汇术语速记指南
Mastering scientific vocabulary is the key to unlocking success in Year 9 CAIE Science. Without a solid grasp of terminology, understanding concepts, interpreting questions, and writing precise answers become daunting tasks. This guide provides you with proven techniques to memorise and recall essential science terms efficiently, covering Physics, Chemistry, and Biology. Let’s turn tricky words into lasting knowledge.
掌握科学词汇是打开九年级CAIE科学成功之门的钥匙。如果没有扎实的术语基础，理解概念、解读题目和写出准确答案都将变得困难重重。本指南为你提供经过验证的技巧，帮助你高效记忆和回忆物理、化学和生物学科中的核心科学术语。让我们把难词变成长久的知识。
1. Why Vocabulary Matters in Science | 为什么科学词汇至关重要
In science, every term carries a precise meaning. Mixing up ‘mass’ and ‘weight’, or ‘atom’ and ‘molecule’, can lead to lost marks. The CAIE curriculum expects you to use scientific language accurately in definitions and explanations.
在科学中，每一个术语都有精确的含义。混淆 “质量” 和 “重量”，或者 “原子” 和 “分子”，可能导致失分。CAIE 课程要求你在定义和解释中准确使用科学语言。
Building a strong vocabulary early helps you grasp advanced topics later, such as ionic bonding or respiration. When you see a term like ‘photosynthesis’, you should instantly recall the process, not just a vague idea.
尽早建立强大的词汇库有助于你日后理解更深入的主题，如离子键或呼吸作用。当你看到 “光合作用” 这样的术语时，你应该立刻回想起整个过程，而不仅仅是一个模糊的概念。
2. The Science of Memorisation | 高效记忆的科学原理
Your brain remembers information best when you revisit it at spaced intervals. This is called ‘spaced repetition’. Instead of cramming all terms the night before a test, review them for short periods over several days. Each review strengthens the neural connections.
大脑在间隔重复接触信息时记忆效果最佳，这被称为 “间隔重复”。与其在考试前一晚死记硬背所有术语，不如在几天内分多次短时间复习。每次复习都会加强神经连接。
Active recall is far more effective than passive reading. Challenge yourself to write down a definition from memory before checking it. This effortful retrieval moves the word from short-term to long-term memory.
主动回忆比被动阅读有效得多。在查看定义之前，先尝试凭记忆默写出来。这种费力的提取过程能将单词从短期记忆转移到长期记忆。
Use dual coding by combining words with images. For example, when memorising ‘diffusion’, visualise particles spreading out from a high-concentration area. The dual representation creates multiple pathways for recall.
通过图文结合的方式进行双重编码。例如，记忆 “扩散” 时，在脑海中想象粒子从高浓度区域向外扩散的画面。双重表征能为回忆创建多条路径。
3. Decoding Scientific Terms: Roots, Prefixes & Suffixes | 破解科学术语：词根、前缀与后缀
Many scientific terms are built from Greek or Latin roots. Once you learn common building blocks, you can decode unfamiliar words. This transforms memorisation from random learning into logical understanding.
许多科学术语源自希腊语或拉丁语词根。一旦你学会常见的构词要素，就能解读陌生词汇。这将把死记硬背转变为逻辑性理解。
Here is a table of useful word parts that appear repeatedly in Year 9 Science:
以下是一张在九年级科学中反复出现的有用词根词缀表：
| Prefix/Suffix | Meaning | Example |
|---|---|---|
| photo- | light | photosynthesis |
| -synthesis | putting together | photosynthesis, protein synthesis |
| a- / an- | without, not | anaerobic (without oxygen) |
| bio- | life | biology, biodegradable |
| -logy | study of | biology, geology |
| exo- | out, outside | exothermic (heat exits) |
| endo- / ento- | inside, within | endothermic, endoskeleton |
| therm- | heat | endothermic, thermometer |
| mono- | one | monomer, monosaccharide |
| poly- | many | polymer, polysaccharide |
| -lysis | splitting, breaking | electrolysis, hydrolysis |
When you encounter ‘electrolysis’, you can break it down: ‘electro-‘ refers to electricity, and ‘-lysis’ means splitting. It instantly makes sense as the splitting of a compound using electricity.
当你看到 “electrolysis” 时，可以将其拆解：“electro-” 指电，“-lysis” 表示分解。你立刻就能明白它是指用电来分解化合物。
4. Physics Key Terms Made Easy | 物理关键词速记
In Physics, terms are often linked through equations and relationships. Understanding these connections is a powerful memorisation tool. Let’s look at a few clusters of related terms.
在物理中，术语常常通过方程和关系联系在一起。理解这些联系是一种强大的记忆工具。我们来看几组相关的术语。
Mass is the amount of matter in an object and is measured in kilograms (kg). Weight is the force of gravity acting on that mass, measured in newtons (N). To remember the difference, think: mass stays the same everywhere; weight changes with gravity.
质量是物体所含物质的多少，以千克（kg）为单位。重量是作用在该质量上的重力，以牛顿（N）为单位。要记住它们的区别，请这样想：质量在任何地方都不变；重量随重力变化。
Speed is simply how fast something moves, but velocity includes a direction. A car going 60 km/h north has a velocity; saying just ’60 km/h’ describes speed. This distinction is a common exam trap.
速率仅仅描述物体运动的快慢，而速度包含了方向。一辆以 60 km/h 向北行驶的汽车具有速度；只说 “60 km/h” 描述的是速率。这一区别是常见的考试陷阱。
Energy is the ability to do work, and both are measured in joules (J). Remember key forms: kinetic energy (movement), potential energy (stored due to position), thermal energy, and chemical energy. When you run, chemical energy in your muscles becomes kinetic and thermal energy.
能量是做功的能力，两者都以焦耳（J）为单位。记住几种关键形式：动能（运动的能量）、势能（因位置而储存的能量）、热能和化学能。当你跑步时，肌肉中的化学能转变为动能和热能。
For electricity, voltage (V) is like the ‘push’ that drives current around a circuit. Current (I) is the flow of charge, measured in amperes (A), and resistance (R) is anything that slows this flow. Connecting these to a water pipe analogy can make the abstract concepts much easier to recall.
在电学中，电压（V）就像是驱动电流在电路中流动的 “推力”。电流（I）是电荷的流动，以安培（A）为单位，而电阻（R）是任何阻碍这一流动的因素。用水管来类比，能让这些抽象概念更容易记住。
5. Chemistry Key Terms Unlocked | 化学关键词速记
Chemistry vocabulary focuses on substances and their changes. Get the foundational definitions crystal clear, and everything else becomes easier.
化学词汇侧重于物质及其变化。将基础定义彻底弄清，其余部分就会变得简单。
An element is a pure substance made of only one type of atom. A compound contains two or more different elements chemically bonded together, while a mixture is simply substances combined physically without bonding. You can separate a mixture easily; separating a compound requires a chemical reaction.
元素是仅由一种原子组成的纯净物。化合物包含两种或两种以上不同元素通过化学键结合，而混合物只是物质物理地混合在一起，没有化学键。你可以很容易地分离混合物；分离化合物则需要化学反应。
The particle model explains the three states of matter: solid (fixed shape, particles vibrate in place), liquid (takes shape of container, particles move around each other), and gas (fills container, particles move rapidly in all directions). ‘Diffusion’ is the net movement of particles from an area of higher concentration to lower concentration.
粒子模型解释了物质的三态：固体（形状固定，粒子在原处振动）、液体（随容器形状，粒子相互滑动）和气体（充满容器，粒子快速向各个方向运动）。“扩散” 是粒子从较高浓度区域向较低浓度区域的净移动。
Chemical reactions make new substances. An exothermic reaction releases energy (usually as heat), so the surroundings get warmer. An endothermic reaction absorbs energy, making the surroundings cooler. Remember ‘exo’ means exit (heat exits) and ‘endo’ means enter (heat enters).
化学反应生成新物质。放热反应释放能量（通常是热量），因此周围环境变热。吸热反应吸收能量，使周围环境变冷。记住 “exo” 表示出（热量出去），“endo” 表示进（热量进来）。
Acids (pH less than 7) and alkalis (pH greater than 7) are key. Acids release H⁺ ions in water, while alkalis release OH⁻ ions. A neutralisation reaction between them produces a salt and water: HCl + NaOH → NaCl + H₂O.
酸（pH 小于 7）和碱（pH 大于 7）是关键。酸在水中释放 H⁺ 离子，而碱释放 OH⁻ 离子。它们之间的中和反应生成盐和水：HCl + NaOH → NaCl + H₂O。
6. Biology Key Terms Simplified | 生物关键词速记
Biology is full of descriptive terms for living things and their processes. Linking each term to a specific function or analogy helps immensely.
生物学充满了描述生物及其过程的术语。将每个术语与特定功能或类比联系起来会大有帮助。
The cell is the basic unit of life. The nucleus controls the cell, the cytoplasm is where reactions happen, the cell membrane controls entry and exit, the mitochondria carry out respiration (release energy), and in plant cells, chloroplasts absorb light for photosynthesis. Think of the cell as a tiny factory: nucleus = control room, mitochondria = power generators, chloroplasts = solar panels.
细胞是生命的基本单位。细胞核控制细胞活动，细胞质是反应发生的场所，细胞膜控制物质进出，线粒体进行呼吸作用（释放能量），而在植物细胞中，叶绿体吸收光能进行光合作用。把细胞想象成一座微型工厂：细胞核 = 控制室，线粒体 = 发电机组，叶绿体 = 太阳能板。
Levels of organisation: cells form tissues, tissues form organs, organs form organ systems, and systems form the organism. For instance, muscle cells → muscle tissue → heart (organ) → circulatory system (organ system) → human (organism).
组织层次：细胞构成组织，组织构成器官，器官构成器官系统，系统构成生物体。例如，肌肉细胞 → 肌肉组织 → 心脏（器官）→ 循环系统（器官系统）→ 人（生物体）。
Photosynthesis and respiration are two core life processes. Photosynthesis captures light energy to make glucose: 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂. Respiration releases energy from glucose: C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O. Notice they are essentially opposite equations.
光合作用和呼吸作用是两个核心生命过程。光合作用捕获光能制造葡萄糖：6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂。呼吸作用从葡萄糖中释放能量：C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O。请注意它们基本上是互为相反的方程。
Diffusion, osmosis, and active transport are methods of moving substances. Osmosis is the special case of diffusion involving only water molecules across a partially permeable membrane. Active transport moves substances against the concentration gradient using energy.
扩散、渗透和主动运输是输送物质的方法。渗透是扩散的特殊情况，仅涉及水分子穿过部分透性膜。主动运输利用能量逆浓度梯度移动物质。
7. Contrastive Memorisation: Commonly Confused Word Pairs | 对比记忆法：容易混淆的词语
Some terms are frequently confused because they sound similar or are used loosely in everyday language. Direct comparison helps carve clear distinctions in your mind.
有些术语经常被混淆，因为它们读音相似或在日常用语中被随意使用。直接对比有助于在头脑中形成清晰的区分。
Mass vs Weight: mass is the amount of stuff (kg), weight is a force (N). On the Moon, your mass stays the same but your weight is less because gravity is weaker.
质量与重量：质量是物质的多少（kg），重量是一种力（N）。在月球上，你的质量保持不变，但因为重力较弱，你的重量会减小。
Heat vs Temperature: Temperature measures how hot an object is (°C or K). Heat is the total thermal energy transferred from a hotter body to a colder one. A huge iceberg may be at a low temperature but contains immense heat energy.
热量与温度：温度衡量一个物体有多热（°C 或 K）。热量是从较热物体传递到较冷物体的总热能。一座巨大的冰山可能温度很低，但含有巨大的热能。
Atom vs Molecule: An atom is the smallest unit of an element (e.g., one He atom). A molecule is two or more atoms chemically bonded (e.g., O₂, H₂O). All compounds are molecules, but not all molecules are compounds.
原子与分子：原子是元素的最小单位（例如一个 He 原子）。分子是两个或更多原子以化学键结合（例如 O₂、H₂O）。所有的化合物都是分子，但并非所有分子都是化合物。
Respiration vs Breathing: Breathing is the physical process of inhaling and exhaling air. Respiration is the chemical process that releases energy inside cells. You breathe to supply oxygen for respiration.
呼吸作用与呼吸：呼吸（breathing）是吸入和呼出空气的物理过程。呼吸作用（respiration）是细胞内释放能量的化学过程。你进行呼吸（breathing）来为呼吸作用（respiration）提供氧气。
Element vs Compound: An element is on the Periodic Table, made of one type of atom. A compound is a substance formed when two or more elements react chemically. Sodium (Na) is an element; sodium chloride (NaCl) is a compound.
元素与化合物：元素在元素周期表中，由一种原子构成。化合物是两种或多种元素通过化学反应生成的物质。钠（Na）是元素；氯化钠（NaCl）是化合物。
8. Association & Visualisation Tricks | 联想与视觉化技巧
Creating vivid mental images or stories turns abstract words into concrete memories. The more bizarre or personal the image, the stronger the memory trace.
创建生动的心理图像或故事能将抽象的词汇转化为具体的记忆。图像越离奇或越个人化，记忆痕迹就越强。
For ‘mitochondria’, the classic saying ‘the powerhouse of the cell’ works because you can visualise a tiny power station with chimneys inside the cell. Link the word ‘mito’ to ‘mighty’ power to reinforce it.
对于 “线粒体”，经典的 “细胞的动力工厂” 说法之所以有效，是因为你可以想象细胞内有一个带烟囱的小型发电站。把 “mito” 与 “mighty”（强大的）联系起来，以加强记忆。
For ‘exothermic’, imagine a running race (therm-) with athletes exiting (exo-) the stadium and giving off heat. For ‘endothermic’, picture them entering (endo-) an ice-cold chamber and absorbing coldness.
对于 “放热（exothermic）”，想象一场赛跑（therm-），运动员们离开（exo-）体育场并散发出热量。对于 “吸热（endothermic）”，想象他们进入（endo-）一个冰冷的房间并吸收寒意。
To remember the order of classification in Biology (Kingdom, Phylum, Class, Order, Family, Genus, Species), make a silly sentence like ‘King Philip Came Over For Good Soup’. The first letter of each word matches the classification levels.
要记住生物分类的等级（界、门、纲、目、科、属、种），可以编一个滑稽的句子，如 “King Philip Came Over For Good Soup”（菲利普国王过来喝美味的汤）。每个单词的首字母都与分类等级匹配。
9. Acronyms & Mnemonics | 首字母缩略词和口诀
Acronyms compress a list of related terms into a single memorable word or phrase. They are excellent for processes that have multiple steps or characteristics.
首字母缩略词将一系列相关术语压缩成一个易记的词或短语。它们非常适合记忆包含多个步骤或特征的过程。
MRS GREN is the classic mnemonic for the seven life processes: Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, Nutrition. Say it out loud like a person’s name to lodge it in your memory.
MRS GREN 是记忆七大生命过程的经典口诀：运动（Movement）、呼吸作用（Respiration）、感应性（Sensitivity）、生长（Growth）、繁殖（Reproduction）、排泄（Excretion）、营养（Nutrition）。像念人名一样大声读出来，把它深藏在记忆中。
OIL RIG helps with redox reactions: Oxidation Is Loss (of electrons), Reduction Is Gain (of electrons). Another one is LEO says GER: Lose Electrons Oxidation, Gain Electrons Reduction. Both mean the same.
OIL RIG 有助于氧化还原反应：氧化是失去电子（Oxidation Is Loss），还原是得到电子（Reduction Is Gain）。另一个是 LEO says GER：失去电子是氧化（Lose Electrons Oxidation），得到电子是还原（Gain Electrons Reduction）。两者的意思相同。
For the colour of the visible spectrum, use ‘Richard Of York Gave Battle In Vain’: Red, Orange, Yellow, Green, Blue, Indigo, Violet. It turns a random sequence into a story you can recollect under exam pressure.
对于可见光谱的颜色，使用 “Richard Of York Gave Battle In Vain”（约克的理查徒劳奋战）：红（Red）、橙（Orange）、黄（Yellow）、绿（Green）、蓝（Blue）、靛（Indigo）、紫（Violet）。它将一个随机序列变成了你在考试压力下也能回想起来的故事。
10. Self-Testing & Active Recall Strategies | 自测与主动回忆策略
Reading your notes over and over gives a false sense of mastery. You only truly know a term when you can explain it from scratch without looking. Make self-testing a daily habit.
一遍遍地阅读笔记会给你一种虚假的掌握感。只有当你能够完全不看书而从零开始解释一个术语时，你才算真正掌握。让自测成为日常习惯。
Create flashcards with the term on one side and the definition, diagram, and an example on the other. Shuffle them and go through them in short bursts, checking which ones you struggle with. Those get more frequent review.
制作抽认卡，一面写术语，另一面写上定义、图解和一个例子。打乱顺序后在短时间内快速浏览，标记出你感到困难的那些卡片。对它们进行更频繁的复习。
Try the ‘blank sheet’ method: take a blank piece of paper and write down everything you can remember about a topic, including key terms and their relationships. Then compare with your notes to identify gaps.
尝试 “白纸法”：拿一张白纸，写下你能记得的关于某个主题的所有内容，包括关键术语及其关系。然后与笔记对比，找出遗漏之处。
Teach a friend or even the wall. When you verbalise a concept, you are forced to organise your understanding logically. If you get stuck, you know exactly which term needs more work.
给朋友讲解，或者对着墙壁讲解。当你把概念说出来时，你会被迫逻辑性地组织自己的理解。如果中途卡壳，你就能知道哪个术语还需要多下功夫。
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