📚 KS3 Cambridge Science: Vocabulary & Terminology Memorisation Guide | KS3剑桥科学：词汇术语速记指南
Mastering the specialised vocabulary of science is the first step to understanding concepts, communicating ideas clearly, and excelling in KS3 Cambridge assessments. This guide presents effective techniques to memorise key scientific terms and their meanings, from word roots to memory tricks, ensuring you can use them confidently in experiments and exams.
掌握科学专业词汇是理解概念、清晰交流思想并在KS3 Cambridge考试中取得优异成绩的第一步。本指南将介绍记忆关键科学术语及其含义的有效方法，从词根到记忆窍门，确保你能够在实验和考试中自信运用这些词汇。
1. The Importance of Scientific Vocabulary | 科学词汇的重要性
Science relies on precise language. For example, in biology 'respiration' is not simply 'breathing' but a biochemical process that releases energy from food. Using the wrong word can completely change the meaning of an answer and cost marks in assessments.
科学需要精确的语言。例如，在生物学中，“呼吸作用”不只是“呼吸”，而是一个从食物中释放能量的生化过程。用错词语会彻底改变答案的含义，并在考试中失分。
Command words in questions such as 'describe', 'explain', or 'compare' also carry specific expectations. Knowing the difference between 'state' (give a fact) and 'explain' (give reasons) helps you structure responses correctly. Building a strong vocabulary from the start saves confusion later.
题目中的指令词如“描述”、“解释”或“比较”也有特定的要求。了解“陈述”（给出事实）与“解释”（给出理由）之间的区别，有助于你正确组织答案。从一开始就打下坚实的词汇基础可以避免日后的混淆。
2. Word Roots and Affixes in Science | 科学词汇的词根和词缀
Many scientific terms are built from Greek or Latin roots, prefixes and suffixes. Recognising these building blocks can help you decode unfamiliar words. For instance, 'bio-' means life, so 'biology' is the study of life; 'photo-' means light, so 'photosynthesis' is the process of building food using light.
许多科学术语由希腊语或拉丁语的词根、前缀和后缀构成。识别这些构词成分可以帮助你拆解不熟悉的词语。例如，“bio-”表示生命，因此“biology”是研究生命的学问；“photo-”表示光，因此“photosynthesis”是利用光制造食物的过程。
| Root / Affix | Meaning | Example (English/Chinese) |
|---|---|---|
| bio- | life / 生命 | biology (生物学) |
| photo- | light / 光 | photosynthesis (光合作用) |
| therm- | heat / 热 | thermometer (温度计) |
| hydro- | water / 水 | hydrogen (氢) |
| micro- | small / 微小 | microscope (显微镜) |
| -scope | look at / 观察 | telescope (望远镜) |
| -meter | measure / 测量 | barometer (气压计) |
| a- / an- | without / 无 | asexual (无性的) |
| geo- | Earth / 地球 | geology (地质学) |
| -logy | study of / 学科 | ecology (生态学) |
When you encounter a new term like 'thermophile', you can break it down: 'therm-' heat and '-phile' lover, so a heat-loving organism. Active use of word roots speeds up learning across all three sciences.
当你遇到一个新词如“thermophile”，你可以将其拆解：“therm-”热，“-phile”爱好者，因此它指喜热生物。主动运用词根能加快你在物化生三科中的学习速度。
3. Biology Key Terms: Cells and Organisation | 生物学关键术语：细胞与组织
The cell is the basic unit of life. 'Cell membrane' is the thin, flexible barrier around every cell, controlling what enters and leaves. 'Cytoplasm' is the jelly-like substance where most chemical reactions occur.
细胞是生命的基本单位。“细胞膜”是每个细胞外薄而柔韧的屏障，控制物质进出。“细胞质”是进行大多数化学反应的胶状物质。
'Nucleus' holds the genetic material (DNA) and controls cell activities. 'Mitochondria' are the powerhouses where respiration takes place to release energy. 'Chloroplasts' contain chlorophyll and are found only in plant cells, capturing light for photosynthesis. 'Vacuole' is a large, fluid-filled space in plant cells that stores water and helps maintain shape.
“细胞核”含有遗传物质(DNA)并控制细胞活动。“线粒体”是进行呼吸作用释放能量的动力工厂。“叶绿体”含有叶绿素，仅存在于植物细胞中，为光合作用捕获光能。“液泡”是植物细胞中充满液体的大空间，储存水分并维持细胞形态。
Moving to organisation: 'Tissue' is a group of similar cells working together, such as muscle tissue. 'Organ' is a structure made of different tissues, like the heart. 'Organ system' refers to a group of organs that perform a major function, e.g. the digestive system. 'Organism' is the complete living individual.
谈到组织层次：“组织”是一群相似细胞共同工作，如肌肉组织。“器官”是由不同组织构成的结构，如心脏。“器官系统”指一组执行主要功能的器官，例如消化系统。“生物体”是完整的生命个体。
4. Chemistry Terminology: Particles, Atoms, and Reactions | 化学术语：粒子、原子与反应
An 'atom' is the smallest unit of an element, consisting of protons, neutrons, and electrons. An 'element' contains only one type of atom, while a 'compound' contains two or more different elements chemically bonded together. A 'mixture' consists of different substances not chemically joined, so they can be separated easily.
“原子”是元素的最小单位，由质子、中子和电子构成。“元素”只含一种原子，而“化合物”含有两种或以上不同元素通过化学键结合。“混合物”由不同物质组成，没有化学结合，因此容易分离。
In a reaction, 'reactants' are the starting substances, and 'products' e show this with a word or symbol equation: reactants → products. Key terms for solutions: 'solute' is the substance dissolved, 'solvent' is the liquid it dissolves in, and 'solution' is the resulting mixture. Common solvents include water.
在反应中，“反应物”是起始物质，“生成物”是形成的新物质。我们用文字或符号方程式表示：反应物 → 生成物。关于溶液的关键术语：“溶质”是被溶解的物质，“溶剂”是溶解溶质的液体，“溶液”是形成的混合物。常见的溶剂包括水。
State changes: 'Melting' is solid to liquid; 'freezing' is liquid to solid; 'boiling' is liquid to gas rapidly; 'evaporation' is liquid to gas at the surface; 'condensation' is gas to liquid; 'sublimation' is solid directly to gas. When a pure substance melts or boils, the temperature remains constant, called the melting point and boiling point.
状态变化：“熔化”是固态变液态；“凝固”是液态变固态；“沸腾”是液态迅速变为气态；“蒸发”是液态在表面变为气态；“冷凝”是气态变液态；“升华”是固态直接变气态。纯净物熔化或沸腾时，温度保持不变，称为熔点和沸点。
5. Physics Terminology: Energy and Forces | 物理学术语：能量与力
'Energy' is the ability to do work, measured in joules (J). It exists in different stores: 'kinetic energy' (movement), 'thermal energy' (heat), 'chemical energy', 'gravitational potential energy' (due to height), 'elastic potential energy' (stretched or compressed), and 'nuclear energy'. Energy can be transferred by forces, heating, or waves.
“能量”是做功的能力，单位为焦耳(J)。能量存在于不同储存形式：“动能”（运动）、“热能”（热量）、“化学能”、“重力势能”（由于高度）、“弹性势能”（拉伸或压缩）和“核能”。能量可以通过力、加热或波来传递。
A 'force' is a push or pull, measured in newtons (N). Contact forces include friction, air resistance, tension, and normal contact force. Non-contact forces include gravitational force, magnetic force, and electrostatic force. 'Weight' is the force of gravity acting on an object's mass, and differs from 'mass', which is the amount of matter in kilograms (kg). The equation is:
“力”是推或拉，单位为牛顿(N)。接触力包括摩擦力、空气阻力、张力和法向接触力。非接触力包括引力、磁力和静电力。“重量”是作用在物体质量上的引力，与“质量”不同，质量是物质的多少，单位为千克(kg)。公式为：
Weight (N) = mass (kg) × gravitational field strength (N/kg)
重量 (N) = 质量 (kg) × 引力场强度 (N/kg)
'Speed' is how fast an object moves (m/s). 'Velocity' is speed in a given direction. 'Acceleration' is the rate of change of velocity. When forces are balanced, an object moves at constant speed or stays still. When unbalanced, it accelerates or decelerates. 'Friction' often opposes motion, converting kinetic energy into thermal energy.
“速率”是物体运动的快慢(m/s)。“速度”是带有方向的速率。“加速度”是速度变化的快慢。当力平衡时，物体匀速运动或静止；当力不平衡时，物体会加速或减速。“摩擦力”通常阻碍运动，将动能转化为热能。
6. Earth Science and Environment Vocabulary | 地球科学与环境词汇
The 'rock cycle' describes how rocks change between three types: 'igneous' (formed from cooled magma or lava), 'sedimentary' (formed from compressed sediments, often containing fossils), and 'metamorphic' (formed when existing rocks are changed by heat and pressure). 'Weathering' is the breakdown of rocks in situ, while 'erosion' involves movement of rock fragments by water, wind, or ice.
“岩石循环”描述了三种岩石类型之间的转化：“火成岩”（由冷却的岩浆或熔岩形成）、“沉积岩”（由压实的沉积物形成，常含化石）和“变质岩”（由原有的岩石受热和压力作用变质而成）。“风化”是岩石在原地的分解，而“侵蚀”指岩石碎片被水、风或冰搬运。
'Fossil fuels' – coal, oil, and natural gas – are non‑renewable resources formed from ancient organisms. Their combustion releases carbon dioxide (CO₂), a greenhouse gas that enhances the natural 'greenhouse effect', leading to 'global warming' and 'climate change'. 'Renewable energy' sources, like solar, wind, and hydroelectric, can be replenished and produce less pollution.
“化石燃料”——煤、石油和天然气——是由远古生物形成的不可再生资源。它们的燃烧释放二氧化碳(CO₂)，这是一种温室气体，会增强天然的“温室效应”，导致“全球变暖”和“气候变化”。“可再生能源”，如太阳能、风能和水电，可以再生且产生更少的污染。
The 'atmosphere' is the layer of gases surrounding Earth. Its composition is roughly 78 % nitrogen, 21 % oxygen, and small amounts of argon, carbon dioxide, and water vapour. 'Carbon cycle' terms: 'photosynthesis' takes in CO₂, 'respiration' releases CO₂, 'combustion' burns carbon‑based fuels, and 'decomposition' breaks down organic matter, returning CO₂ to the air.
“大气层”是包围地球的气体层。其组成大约为78%氮气、21%氧气，以及少量氩气、二氧化碳和水蒸气。“碳循环”术语：“光合作用”吸收CO₂，“呼吸作用”释放CO₂，“燃烧”消耗碳基燃料，“分解”将有机物分解，将CO₂返回大气。
7. Experimental Skills and Equipment Terms | 实验技能与设备术语
Successful practical work depends on knowing apparatus names and safety rules. A 'Bunsen burner' is used for heating; you adjust the air hole to change from a yellow safety flame to a roaring blue flame. A 'test tube' holds small amounts, a 'beaker' holds larger volumes, and a 'measuring cylinder' measures liquid volume accurately.
成功的实验操作依赖于熟悉仪器名称和安全规则。“本生灯”用于加热；调节气孔可在黄色安全焰与蓝色强火焰之间切换。“试管”盛装少量物质，“烧杯”盛装较大体积，“量筒”准确量取液体体积。
A 'thermometer' measures temperature in degrees Celsius (°C). A 'microscope' magnifies tiny objects; key parts include the eyepiece lens, objective lenses, stage, and focus knobs. To prepare a slide, place a thin specimen in water and add a coverslip to avoid air bubbles.
“温度计”测量温度，单位为摄氏度(°C)。“显微镜”放大微小物体；关键部件包括目镜、物镜、载物台和调焦旋钮。制备玻片时，将薄样本置于水中，加上盖玻片以避免气泡。
In any investigation, a 'hypothesis' is a testable prediction. The 'independent variable' is what you change, the 'dependent variable' is what you measure, and 'control variables' are kept constant to ensure a fair test. An 'anomalous' result is one that does not fit the pattern; repeating measurements improves reliability. Always record observations clearly and use tables to present data.
在任何探究中，“假设”是可检验的预测。“自变量”是你改变的量，“因变量”是你测量的量，“控制变量”保持不变以确保公平实验。“异常”结果是不符合规律的数据点；重复测量可以提高可靠性。始终清晰记录观察结果，并用表格呈现数据。
8. Mnemonics: Acronyms and Associations | 记忆术：首字母缩略与联想
Mnemonics turn lists of words into memorable phrases. For the seven life processes, remember 'MRS GREN': Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, Nutrition. For the colours of the visible spectrum, 'Richard Of York Gave Battle In Vain' helps recall red, orange, yellow, green, blue, indigo, violet.
记忆法可将一连串单词转化为易记的短语。对于七项生命活动，记住“MRS GREN”：运动、呼吸、感应、生长、繁殖、排泄、营养。对于可见光谱颜色，“Richard Of York Gave Battle In Vain”帮助回忆红、橙、黄、绿、蓝、靛、紫。
Create your own visual associations. Picture a 'nucleus' as the control centre of a factory, 'mitochondria' as tiny power generators, and 'cell membrane' as a security gate. For chemistry, imagine atoms as Lego bricks: elements are single-colour bricks, compounds are multicolour structures snapped together, and mixtures are just different bricks in a box.
创建你自己的视觉联想。把“细胞核”想象成工厂的控制中心，“线粒体”如同微型发电机，“细胞膜”如同安检门。对于化学，把原子想象成乐高积木：元素是单一颜色的积木，化合物是拼在一起的多色结构，混合物只是装在盒子里的不同积木。
ses through producer → primary consumer → secondary consumer → tertiary consumer. Remember 'Poppy's Purple Snails Try' to recall the order. Make your sentences silly:
Published by TutorHao | KS3 Science 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