📚 Year 8 CAIE Science: Vocabulary & Terminology Quick Memory Guide | Year 8 CAIE 科学：词汇术语速记指南
Mastering science is not just about understanding concepts – it begins with knowing the language. In Year 8 CAIE Science, you will encounter new words every lesson, from 'photosynthesis' to 'resultant force'. This guide will help you learn, remember and use key scientific terms confidently, with simple memory techniques tailored for 12–13 year olds.
掌握科学不仅仅是理解概念，首先要掌握它的语言。在 Year 8 CAIE 科学课程中，你每节课都会遇见新词，从 'photosynthesis' 到 'resultant force'。这本指南将帮助你学习、记住并自信地使用关键科学术语，并配以适合 12 至 13 岁学生的简单记忆技巧。
1. Why Science Vocabulary Matters | 科学词汇为何重要
Every scientific idea is built on precise words. If you confuse 'mass' with 'weight', or 'element' with 'compound', you can lose marks even if you know the science. Learning vocabulary properly means you can explain experiments, answer exam questions accurately, and sound like a real scientist.
每一个科学概念都建立在精确的词汇之上。如果你混淆了 'mass' 与 'weight'，或 'element' 与 'compound'，即使你懂科学也会丢分。正确学习词汇意味着你能够清楚地解释实验、准确地回答考题，并且像一位真正的科学家一样表达。
CAIE Year 8 Science assessments often test definitions directly. If you can recall that an 'independent variable' is the one you change, you immediately understand the question's focus. Building a strong word bank early will make Year 9 and IGCSE Sciences far more manageable.
CAIE Year 8 科学评估常常直接考查定义。如果你能回忆起 'independent variable' 是你改变的那个变量，你立刻就能抓住题目的重点。尽早建立强大的词汇库，会让 Year 9 和 IGCSE 科学变得轻松许多。
2. Biology Terms: Cells to Systems | 生物术语：从细胞到系统
Biology is full of naming words. Start with the building block: cell – the smallest unit of life. A group of similar cells working together is a tissue. Different tissues form an organ (like the heart), and organs work together in an organ system rculatory system). Think of the sequence: Cell → Tissue → Organ → Organ System → Organism.
生物学充满了命名词汇。从构成生物的砖块开始：cell（细胞）——生命的最小单位。一组相似细胞共同工作形成 tissue（组织）。不同组织组成 organ（器官，如心脏），器官共同工作在 organ system（器官系统，如循环系统）。记住这个序列：细胞 → 组织 → 器官 → 器官系统 → 生物体。
Key words for plant biology include photosynthesis (photo = light, synthesis = putting together) – the process where plants use sunlight to make food. Chlorophyll is the green pigment that captures light energy. 'Chloro-' means green, and '-phyll' means leaf. These word parts are your memory shortcuts.
植物生物学的关键词包括 photosynthesis（光合作用：photo = 光，synthesis = 组合）——植物利用阳光制造养分的过程。Chlorophyll（叶绿素）是捕获光能的绿色色素。'Chloro-' 意为绿色，'-phyll' 意为叶。这些词根是你的记忆捷径。
3. Chemistry Terms: Atoms, Elements and Compounds | 化学术语：原子、元素与化合物
In Year 8, chemistry vocabulary is all about what substances are made of. An atom is the smallest particle of an element. An element is a substance made of only one type of atom – it cannot be broken down into simpler substances. A compound is two or more different elements chemically joined together. Use the sentence: 'All compounds are made of elements, but not all elements are compounds.'
在 Year 8 阶段，化学词汇主要关于物质的组成。atom（原子）是元素的最小粒子。element（元素）是只由一种原子组成的物质——它不能被分解成更简单的物质。compound（化合物）是两种或更多不同元素通过化学方式结合在一起的物质。记住这句话：'所有化合物都由元素组成，但并非所有元素都是化合物。'
A mixture is different – it contains two or more substances not chemically joined, so they can be separated easily. Think of a salad. A molecule is a group of atoms bonded together; it can be an element (O₂) or a compound (H₂O). Remember: water is a compound, and its formula H₂O tells you it has two hydrogen atoms and one oxygen atom.
mixture（混合物）则不同——它包含两种或更多没有化学结合的物质，因此可以轻易分离。想想沙拉。molecule（分子）是一组键合在一起的原子；它可以是元素（O₂）或化合物（H₂O）。记住：水是化合物，其化学式 H₂O 告诉你它有两个氢原子和一个氧原子。
4. Physics Terms: Forces and Energy | 物理术语：力与能量
Physics terms often describe interactions. A force is a push or a pull. When forces are balanced, an object stays at rest or moves at constant speed. When they are unbalanced, there is a resultant force that causes acceleration. Use the picture of a tug-of-war: equal forces mean no movement; unequal forces mean movement in the direction of the bigger pull.
物理术语经常描述相互作用。force（力）是推或拉。当力平衡时，物体保持静止或匀速运动。当力不平衡时，存在一个 resultant force（合力）导致加速。想象拔河比赛：相等的力意味着不移动；不相等的力意味着朝较大拉力的方向移动。
Energy is the ability to do work. It exists in many stores: kinetic (movement), thermal (heat), chemical, gravitational potential (stored due to height), elastic potential (stretched or compressed springs). Energy can be transferred from one store to another, but the total amount always stays the same – this is the principle of conservation of energy.
Energy（能量）是做功的能力。它存在于多种 stores（储能库）中：kinetic（动能，运动），thermal（热能，热），chemical（化学能），gravitational potential（重力势能，因高度储存），elastic potential（弹性势能，拉伸或压缩的弹簧）。能量可以从一个储能库转移到另一个，但总量始终保持不变——这就是 能量守恒原理。
5. Memory Technique 1: Word Parts (Prefixes and Suffixes) | 记忆技巧 1：词根词缀法
rn the most common prefixes and suffixes, you can decode almost any new term. For example, 'bio-' means life, 'geo-' means earth, 'therm-' means heat, 'photo-' means light. 'Logy' means study of, so biology = study of life. 'Meter' means measure, so thermometer = heat measurer.
许多科学词汇由希腊或拉丁词根构成。如果你学会最常见的词根词缀，几乎可以破解任何新术语。例如，'bio-' 意为生命，'geo-' 意为地球，'therm-' 意为热，'photo-' 意为光。'logy' 意为……学，所以 biology = 生命科学。'meter' 意为测量仪，所以 thermometer = 热量测量仪。
Here is a quick table of high-frequency word parts for Year 8:
以下是一张 Year 8 高频词根速查表：
| Prefix / Suffix | Meaning | Example |
|---|---|---|
| a- / an- | without, not | anaerobic (without oxygen) |
| aqua- | water | aqueous (dissolved in water) |
| endo- | inside, within | endothermic (taking in heat) |
| exo- | outside, out of | exothermic (giving out heat) |
| homo- | same | homogeneous (same throughout) |
| hetero- | different | heterogeneous (different parts visible) |
6. Memory Technique 2: Visual Stories and Mnemonics | 记忆技巧 2：视觉故事与助记符
The brain remembers pictures and stories much better than words alone. For the seven characteristics of living things – Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, Nutrition – use the mnemonic MRS GREN. Imagine a friendly grandmother called Mrs Gren who moves, breathes, and eats, helping you recall each process.
大脑对图像和故事的记忆远胜于孤立的文字。对于生物的七大特征——Movement（运动）、Respiration（呼吸）、Sensitivity（感应）、Growth（生长）、Reproduction（繁殖）、Excretion（排泄）、Nutrition（营养）——用助记符 MRS GREN。想象一位名叫 Mrs Gren 的慈祥奶奶，她会动、会呼吸、会吃饭，帮你回忆起每一个过程。
For the order of classification (Kingdom, Phylum, Class, Order, Family, Genus, Species), remember: 'Kids Prefer Cheese Over Fried Green Spinach' or create your own silly sentence. The sillier the story, the stickier the memory. To recall that an ion is a charged particle, picture an eye-on (ion) that has a plus or minus sign on it.
对于分类层级（Kingdom 界, Phylum 门, Class 纲, Order 目, Family 科, Genus 属, Species 种），记住：'Kids Prefer Cheese Over Fried Green Spinach' 或编造你自己的荒诞句子。故事越荒诞，记忆越牢固。为了记住 ion（离子）是带电粒子，想象一只眼睛（eye-on）上有正号或负号。
7. Scientific Enquiry Terms: Variables and Methods | 科学探究术语：变量与方法
Every experiment in Year 8 requires you to understand three key variables. The independent variable is the one you deliberately change. The dependent variable is the one you measure – it depends on what you changed. Control variables are all the things you must keep the same to make the test fair.
每个 Year 8 实验都要求你理解三个关键变量。independent variable（自变量）是你故意改变的那个量。dependent variable（因变量）是你测量的量——它依赖于你所改变的量。control variables（控制变量）是你必须保持不变的量，以确保实验公平。
A hypothesis is an idea you can test – not just a guess, but a prediction based on knowledge. The conclusion says what you found out, and it must be supported by evidence. Learn the word anomalous – a result that does not fit the pattern. When you spot one, you need to suggest why it might have happened.
hypothesis（假设）是你可以检验的想法——不只是一个猜测，而是基于知识的预测。conclusion（结论）说明你发现了什么，并且必须有证据支持。掌握 anomalous（异常的）这个词——一个不符合整体模式的结果。当你发现它时，需要说明它可能出现的原因。
8. Commonly Confused Word Pairs | 易混淆词对辨析
Some words look alike but mean very different things. A classic pair is mass and weight. Mass is the amount of matter in an object (measured in kg) and never changes. Weight is the force of gravity on that mass (measured in N) and can change on different planets. Use the phrase: 'Mass stays, weight varies.'
有些词看起来很相似，但意思完全不同。一对经典例子是 mass 和 weight。Mass（质量）是物体所含物质的量（以 kg 为单位），永不改变。Weight（重量）是该质量所受的重力（以 N 为单位），在不同行星上会改变。记住这句话：'质量永恒，重量可变。'
Another pair: transparent lets all light through (you can see clearly); translucent lets some light through but scatters it (you can see light but not clear shapes); opaque lets no light through. A window is transparent, frosted glass is translucent, and a brick wall is opaque. Picture the 't' in transparent for 'totally see-through'.
另一对：transparent（透明）让所有光通过（你能看得很清楚）；translucent（半透明）让部分光通过但散射了（你能看到光，但看不清形状）；opaque（不透明）不让任何光通过。窗户是透明的，磨砂玻璃是半透明的，砖墙是不透明的。把 transparent 中的 't' 想象成 'totally see-through'。
In chemistry, do not mix up solute, solvent and solution , . The solute is the solid that dissolves, the solvent is the liquid it dissolves in, and the solution is the final mixture. Think: 'Solute + Solvent = Solution'. The word 'solvent' hints at a liquid solving the solid.
在化学中，不要混淆 solute（溶质）、solvent（溶剂）和 solution（溶液）。溶质是溶解的固体，溶剂是溶解它的液体，溶液是最终的混合物。记住：'溶质 + 溶剂 = 溶液'。'solvent' 一词暗示了溶解固体的液体。
9. Quick Memory Cards: How to Make Them Work | 速记卡片：如何发挥最大作用
Write the term on one side of a card and a clear definition, an example, and a simple sketch on the other. For 'diffusion', draw dots spreading from an area of high concentration to low concentration. The combination of word, picture and your own handwriting creates multiple memory hooks.
在卡片的一面写上术语，另一面写上清晰的定义、一个例子和一个简单草图。对于 'diffusion'（扩散），画一些圆点从一个高浓度区域向低浓度区域扩散。文字、图画和你自己的笔迹结合起来，会形成多重记忆挂钩。
Test yourself both ways: read the term and recall the definition, then read the definition and name the term. Use a spaced repetition system – review new cards daily for the first week, then every three days, then weekly. This moves words from short-term to long-term memory. Use a box with dividers labelled 'Today', 'Every 3 Days', 'Weekly'.
从两个方向测试自己：看术语回忆定义，看定义说出术语。使用间隔重复系统——新卡片第一周每天复习，然后每三天一次，再然后每周一次。这会将词汇从短期记忆转移到长期记忆。用带隔板的小盒子，标上 'Today', 'Every 3 Days', 'Weekly'。
10. Using Vocabulary in Context | 在语境中使用词汇
Words stick better when you use them actively. After learning a new term, write three sentences that show its meaning. For 'diffusion', you might write: 'Perfume diffuses across a room until the smell is even.' 'Oxygen diffuses from the blood into muscle cells.' 'Diffusion does not require energy because particles move randomly.'
当你积极使用时，词汇记得更牢。学到一个新术语后，写三个展示其含义的句子。对于 'diffusion'，你可以写：'香水在房间中扩散，直到气味均匀。' '氧气从血液扩散进入肌肉细胞。' '扩散不需要能量，因为粒子是随机运动的。'
When you revise a topic, challenge yourself to explain a whole process using only the proper scientific terms. Describe photosynthesis: 'Light energy is absorbed by chlorophyll in chloroplasts. Carbon dioxide and water react to produce glucose and oxygen.' Replacing everyday words with scientific ones trains your brain for exams.
复习一个主题时，挑战自己只用正确的科学术语解释整个过程。描述光合作用：'光能被叶绿体中的叶绿素吸收。二氧化碳与水反应生成葡萄糖和氧气。' 用科学词汇替换日常用语，能为考试训练大脑。
11. Self-Check: Can You Define These? | 自测：你能定义这些词吗？
Cover the right-hand side and test yourself on these 12 core Year 8 terms. If you hesitate on any, go back and make a dedicated memory card.
遮住右侧，测试自己这 12 个 Year 8 核心术语。如果对任何一个犹豫不决，回去做一张专门的记忆卡。
- Cell membrane – a thin layer around a cell that controls what enters and leaves.
- Respiration – the process of releasing energy from food, in every living cell.
- Atom – the smallest particle of an element that can take part in a chemical reaction.
- Compound – a substance made of two or more different elements chemically bonded.
- Reactivity – how readily a substance undergoes a chemical change.
- Gravity – a force of attraction between masses; on Earth it pulls objects toward the centre.
- Friction – a force that opposes motion between two surfaces in contact.
- Displacement reaction – a reaction where a more reactive element takes the place of a less reactive one.
- Acid – a substance with a pH less than 7 that releases hydrogen ions in water.
- Alkali – a soluble base with a pH greater than 7.
- Circuit – a complete path around which electricity can flow.
- Moment – the turning effect of a force, calculated as force x perpendicular distance from pivot.
Every time you define a word precisely, you strengthen your understanding of the whole topic.
每当你精确地定义一个词，你就加深了对整个主题的理解。
12. Building a Habit: 5 Minutes a Day | 养成习惯：每天五分钟
Consistency beats cramming. Pick three new words each day from your glossary, write their word parts, say them aloud, sketch a mini-diagram, and use each in a sentence. In just one month, you will have mastered over 80 new terms – enough to transform your confidence in science.
持之以恒胜过死记硬背。每天从你的术语表里挑三个新词，拆解它们的词根，大声朗读，画个小图，再用每个词造个句。仅仅一个月，你就能掌握 80 多个新术语——足以彻底改变你对科学的信心。
Keep a small notebook as your 'Science Word Log'. Date each entry. Revisit old pages often. Reward yourself when you fill a whole logbook because science is a language, and you are becoming fluent.
准备一个小本子作为你的 '科学词汇日志'。为每个条目标注日期。经常重温旧页。当你写满一整本日志时奖励自己，因为科学是一门语言，而你正在变得流利。
Published by TutorHao | Science Revision Series | aleveler.com
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