📚 WJEC Year 9 Biology: A Quick Guide to Memorising Key Terminology | WJEC 九年级生物：关键术语速记指南
Struggling to remember all the tricky words in your Year 9 WJEC Biology course? You are not alone. Scientific vocabulary can feel like learning a foreign language, but once you spot the patterns, build memory hooks, and practise a little each day, the terms will start to stick. This guide will walk you through the essential terminology, grouped by topic, and give you easy-to-use strategies to lock each word into your long-term memory.
在为九年级 WJEC 生物课程中那些难记的词汇而苦恼吗？你并不孤单。科学术语有时就像在学一门新语言，可一旦你发现了其中的规律、建立起记忆关联，并坚持每天练习，这些词汇就会牢牢扎根在你的脑海里。本指南将带你梳理各专题的关键术语，并为你提供简单好用的方法，把每一个词都送进长期记忆。
1. Cell Structure and Function | 细胞结构与功能
The building block of all living things is the cell. To visualise the parts, imagine a factory: the nucleus is the CEO’s office containing the blueprints (DNA); cytoplasm is the factory floor where chemical reactions happen; cell membrane is the security gate controlling what enters and leaves; mitochondria (singular: mitochondrion) are the power generators releasing energy through respiration. Plant cells have three extras: a rigid cell wall made of cellulose, a large permanent vacuole filled with cell sap, and chloroplasts that capture sunlight for photosynthesis.
所有生物的基本单位是细胞。为了形象地理解各组成部分，可以把它想象成一座工厂：细胞核是存放蓝图（DNA）的 CEO 办公室；细胞质是进行化学反应的车间地面；细胞膜是控制物质进出的门卫；线粒体是通过呼吸作用释放能量的发电机。植物细胞还多出三个结构：由纤维素构成的坚硬细胞壁、充满细胞液的大液泡，以及捕捉阳光进行光合作用的叶绿体。
Two terms that often cause confusion are prokaryotic and eukaryotic. Prokaryotic cells (e.g. bacteria) lack a true nucleus – think pro = before a nucleus. Eukaryotic cells (plants, animals, fungi) have a ‘true’ nucleus – eu = true.
容易混淆的两个词是原核和真核。原核细胞（如细菌）没有真正的细胞核——可记作 pro 表示在细胞核之前。真核细胞（植物、动物、真菌）具有‘真正’的细胞核——eu 表示真。
| Term (术语) | Memory Aid (记忆小贴士) |
|---|---|
| Mitochondria | Mighty mitochondria make energy. |
| Chloroplast | Chloroplast contains chlorophyll – both start with ‘chloro’ (green). |
| Vacuole | Vacuum – a space that stores liquid, like a water tank. |
2. Levels of Organisation | 结构层次
From the smallest to the largest, living organisms are arranged as: cells → tissues → organs → organ systems → organism. A tissue is a group of similar cells working together – like muscle tissue. An organ is made of different tissues collaborating for a specific function – the stomach is an organ containing muscle tissue and glandular tissue. An organ system is a group of organs that perform a major function – the digestive system includes the mouth, stomach, intestines, and more.
生物体从小到大排列为：细胞 → 组织 → 器官 → 器官系统 → 生物体。组织是一群相似的细胞协同工作——比如肌肉组织。器官由不同的组织构成，共同完成特定功能——胃就是一个含有肌肉组织和腺体组织的器官。器官系统是一组共同执行重要功能的器官——消化系统就包括口腔、胃、肠道等。
One classic exam question asks you to give an example of each level. Practise using a familiar organism: human – cardiac muscle cell, cardiac muscle tissue, heart, circulatory system. Plant example: palisade cell, palisade mesophyll tissue, leaf, shoot system.
考试中常见的题目是要求举出每个层次的例子。可以用熟悉的生物来练习：人体——心肌细胞、心肌组织、心脏、循环系统。植物例子：栅栏细胞、栅栏叶肉组织、叶、地上部系统。
3. Photosynthesis and Respiration | 光合作用与呼吸作用
The two powerhouse processes are easily confused, but they are opposites in many ways. Photosynthesis builds glucose using light energy – occurring only in plants and some microorganisms. The word equation is: Carbon dioxide + Water → Glucose + Oxygen (light energy above the arrow). The balanced symbol equation is: 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂. Remember: photo = light, synthesis = building.
这两大核心过程很容易搞混，但它们在很多方面恰好相反。光合作用利用光能制造葡萄糖——只发生在植物和部分微生物中。文字方程式是：二氧化碳 + 水 → 葡萄糖 + 氧气（箭头之上可写上光能）。配平后的符号方程式为：6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂。可这样记：photo 表示光，synthesis 表示合成。
Aerobic respiration releases energy from glucose in the mitochondria of almost all living cells. The word equation: Glucose + Oxygen → Carbon dioxide + Water (+ energy). Symbol equation: C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O. Notice it is the exact reverse of photosynthesis! Anaerobic respiration in animals produces lactic acid (causes muscle cramps), while in yeast it produces ethanol and carbon dioxide – a process called fermentation.
有氧呼吸在几乎所有活细胞的线粒体中分解葡萄糖释放能量。文字方程式：葡萄糖 + 氧气 → 二氧化碳 + 水（+ 能量）。符号方程式：C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O。请注意，这正好是光合作用的逆反应！动物体内的无氧呼吸产生乳酸（会导致肌肉酸痛），而酵母菌的无氧呼吸产生乙醇和二氧化碳——这一过程叫做发酵。
4. Digestive System and Enzymes | 消化系统与酶
The digestive system breaks down large insoluble molecules into small soluble ones that can be absorbed into the blood. Key organs to remember: mouth (mechanical digestion by teeth, chemical digestion by salivary amylase), oesophagus (peristalsis pushes food down), stomach (protease begins protein digestion, hydrochloric acid kills bacteria), small intestine (digestion completes, absorption of nutrients), large intestine (water absorption), rectum (storage of faeces).
消化系统将大的不溶性分子分解为可被吸收进入血液的小分子可溶性物质。需要记住的关键器官有：口腔（牙齿进行物理消化，唾液淀粉酶开始化学消化）、食道（蠕动将食物推送下移）、胃（蛋白酶开始消化蛋白质，盐酸杀灭细菌）、小肠（完成消化，吸收营养物质）、大肠（吸收水分）、直肠（储存粪便）。
Enzymes are biological catalysts – they speed up reactions without being used up. Each enzyme has an active site with a specific shape matching its substrate, often described by the lock and key model. Amylase breaks down starch into maltose (found in saliva and small intestine), protease breaks down proteins into amino acids (stomach and small intestine), lipase breaks down lipids into fatty acids and glycerol (small intestine). Bile is not an enzyme; it emulsifies fats to increase surface area.
酶是生物催化剂——它们只加快反应自身却不被消耗。每种酶都有一个活性位点，具有与其底物相匹配的特定形状，常被描述为锁钥模型。淀粉酶将淀粉分解为麦芽糖（存在于唾液和小肠中），蛋白酶将蛋白质分解为氨基酸（胃和小肠），脂肪酶将脂类分解为脂肪酸和甘油（小肠）。胆汁不是酶，它可以乳化脂肪以增大表面积。
A quick memory trick: Amylase → Amylum (starch); Protease → Protein; Lipase → Lipids. Match the first letter.
快速记忆法：Amylase（淀粉酶）→ Amylum（淀粉）；Protease（蛋白酶）→ Protein（蛋白质）；Lipase（脂肪酶）→ Lipids（脂类）。首字母配对法。
5. Circulatory System and Blood | 循环系统与血液
The circulatory system is your body’s transport network. The heart pumps blood through three types of vessels: arteries carry blood away from the heart (thick muscular walls, high pressure, pulse), veins carry blood back to the heart (thinner walls, have valves to prevent backflow), capillaries are microscopic vessels where exchange of gases and nutrients occurs (one cell thick walls).
循环系统是身体内部的运输网络。心脏把血液泵入三种类型的血管：动脉将血液带离心脏（管壁厚而有弹性，压力高，有脉搏），静脉将血液送回心脏（管壁较薄，有瓣膜防止回流），毛细血管是进行气体和营养物质交换的微小血管（管壁仅有一个细胞的厚度）。
Blood components: red blood cells (contain haemoglobin, transport oxygen – no nucleus, biconcave disc shape), white blood cells (fight infection, part of immune system), platelets (help blood clot), plasma (liquid carrying dissolved substances, including carbon dioxide, glucose, hormones). Use the mnemonic: Red Warriors Protect Plasma – Red cells, White cells, Platelets, Plasma.
血液的组成：红细胞（含血红蛋白，运输氧气——无细胞核，双凹圆盘形），白细胞（抵抗感染，属于免疫系统），血小板（帮助血液凝固），血浆（运载溶解物质的液体，包括二氧化碳、葡萄糖、激素等）。使用记忆口诀：红白细胞皆勇士，血浆里面游——红细胞、白细胞、血小板、血浆。
6. Reproduction Terminology | 生殖术语
WJEC Year 9 introduces the human reproductive systems. The male gamete is the sperm, produced in the testes (kept outside the body in the scrotum for temperature control). The female gamete is the egg (ovum), produced in the ovaries. Fertilisation is the fusion of the nuclei of sperm and egg to form a zygote, which then undergoes cell division and becomes an embryo, and later a foetus. The embryo implants in the lining of the uterus and is nourished via the placenta.
WJEC 九年级课程引入了人体生殖系统。雄性配子是精子，在睾丸中产生（睾丸位于体外阴囊中以便控制温度）。雌性配子为卵子，由卵巢产生。受精是精子和卵子核的融合，形成受精卵，之后进行细胞分裂，先发育为胚胎，再成为胎儿。胚胎着床于子宫内膜，并通过胎盘获得营养。
Menstrual cycle terms: the menstruation (period) is the shedding of the uterus lining; ovulation is the release of an egg around day 14 of a 28-day cycle. Hormones involved: oestrogen and progesterone. Keep these straight by noting that oestrogen builds the lining, and progesterone maintains it (think pro-gestation – for pregnancy).
月经周期相关术语：月经是子宫内膜的脱落；排卵是指在 28 天周期的大约第 14 天释放一个卵子。涉及的激素有雌激素和孕激素。可以这样区分：雌激素使内膜增厚，而孕激素维护内膜（pro-gestation 意为支持怀孕）。
7. Inheritance and Genetics Vocabulary | 遗传与遗传学词汇
Genetics is packed with abstract terms that are easier if you learn them as pairs. Gene: a section of DNA that codes for a protein. Allele: a version of a gene. Genotype: the combination of alleles an organism has (e.g. Bb). Phenotype: the physical expression (e.g. brown eyes). Dominant allele: always expressed if present (capital letter, e.g. B). Recessive allele: only expressed if two copies are present (lower case, e.g. b). Homozygous: two identical alleles (BB or bb). Heterozygous: two different alleles (Bb).
遗传学中充满了抽象术语，但只要把它们成对来学就会容易得多。基因：编码蛋白质的一段 DNA。等位基因：同一基因的不同形式。基因型：一个生物体所拥有的等位基因组合（如 Bb）。表现型：外在表现（如棕色眼睛）。显性等位基因：只要存在就会表现出来（用大写字母表示，如 B）。隐性等位基因：只有存在两个拷贝时才会表现（用小写字母，如 b）。纯合：两个等位基因相同（BB 或 bb）。杂合：两个等位基因不同（Bb）。
Punnett squares help predict the probability of offspring genotypes. Always label gametes along the top and side. A monohybrid cross involves one gene. Learn the ratios: a cross between two heterozygous parents (Bb × Bb) gives a 3:1 phenotype ratio if dominance is complete.
庞纳特方格有助于预测子代基因型的概率。需始终沿顶行和侧列标注配子。单基因杂交涉及一对基因。牢记比例：两个杂合亲本杂交（Bb × Bb），完全显性时表现型比例为 3:1。
8. Ecology and Sampling Techniques | 生态与取样技术
Out in the field, you will encounter terms like habitat (where an organism lives), population (all organisms of one species in a habitat), community (all populations living together), and ecosystem (the community plus the abiotic environment). Biodiversity is the variety of different species in an area. Food chains show energy transfer; a producer (plant) is always at the start, followed by primary consumer, secondary consumer, etc. The arrows show the direction of energy flow.
在野外调查中，你会遇到如栖息地（生物居住的地方）、种群（同一栖息地中间种生物的所有个体）、群落（所有种群生活在一起）和生态系统（群落加上非生物环境）等术语。生物多样性指一个地区不同物种的多样性。食物链显示了能量的传递；生产者（植物）总是位于起始端，随后是初级消费者、次级消费者等。箭头表示能量流动的方向。
Sampling methods: quadrat (square frame placed randomly to count organisms or percentage cover, used for plants or slow-moving animals), transect (line through a habitat to study distribution changes), pitfall trap (for small ground-dwelling invertebrates), sweep net (for insects in vegetation). Remember to calculate mean, median, and mode when analysing your data.
取样方法：样方（随机放置的方形框，用于计数生物个数或覆盖百分比，适用于植物或行动缓慢的动物），样线（穿越栖息地的一条线，用于研究分布变化），陷阱（捕捉地面小型无脊椎动物），扫网（用于捕获植被中的昆虫）。分析数据时需记住要计算平均值、中位数和众数。
9. Key Experimental Terms | 关键实验术语
You must be able to use the language of scientific enquiry. The independent variable is the one you change; the dependent variable is the one you measure; control variables are the ones kept the same. A fair test means only the independent variable affects the dependent variable. An anomalous result is a data point that does not fit the pattern.
你必须能够运用科学探究的术语。自变量是你主动改变的那个变量；因变量是你测量的那个变量；控制变量是保持不变的那个变量。公平测试意味着只有自变量影响因变量。异常结果是指与其他数据规律不相符的数据点。
When writing a conclusion, refer back to the hypothesis. Use phrases like ‘as the independent variable increases, the dependent variable…’ Never say ‘prove’; say ‘supports the hypothesis’. A systematic error makes all measurements wrong by the same amount; a random error causes unpredictable variation. Precision is linked to the smallest scale division of an instrument; accuracy is how close the result is to the true value.
撰写结论时，要回扣假设。使用‘随着自变量增大，因变量……’这样的表述。永远不要用‘证明’，而应说‘支持假设’。系统误差是使所有测量都偏离相同幅度的误差；随机误差会产生不可预测的波动。精密度与仪器的最小刻度值相关；准确度则是测量值与真实值的接近程度。
10. Acronyms and Quick Memory Hacks | 首字母缩略词和快速记忆技巧
Create your own acronyms or use well-known ones. For the classification hierarchy, remember King Philip Came Over For Good Spaghetti – Kingdom, Phylum, Class, Order, Family, Genus, Species. For the seven life processes, MRS GREN: Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, Nutrition.
你可以自己编首字母缩略词，也可以使用常见的经典口诀。生物分类层级可用：King Philip Came Over For Good Spaghetti（界、门、纲、目、科、属、种）。七大生命活动则用 MRS GREN：运动、呼吸、感应、生长、生殖、排泄、营养。
Visualise words: for phagocytosis (cell eating), imagine a cell arm wrapping around food – ‘phago’ means eating. For haemoglobin, picture red blood cells as red taxis carrying oxygen passengers. Link diffusion to a crowd leaving a stuffy room – particles move from high concentration to low concentration until evenly spread. The steeper the concentration gradient, the faster the rate.
把词汇视觉化：看到胞吞（细胞吞噬）一词时，可以想象细胞伸出‘手臂’包裹食物——‘phago’就是吃的意思。对于血红蛋白，可以把红细胞想象成载着氧气乘客的红色出租车。把扩散联想成人群从闷热的房间往外走——粒子从高浓度区域向低浓度区域移动，直到均匀分布。浓度梯度越陡，速率越快。
11. Word Roots and Meaning – Decoding Terms | 词根与含义 – 破译术语
Many biology words are built from Latin or Greek roots. Once you learn a few chunks, you can decode unfamiliar words. Common prefixes: a- / an- (without, e.g. anaerobic – without oxygen), auto- (self, e.g. autotroph – self-feeding), bio- (life), chloro- (green), cyto- (cell), endo- (inside), exo- (outside), hyper- (above), hypo- (below), multi- (many), uni- (one). Useful suffixes: -ose (sugar, e.g. glucose, sucrose), -ase (enzyme, e.g. amylase, lipase), -itis (inflammation, e.g. tonsillitis), -logy (study of, e.g. biology).
许多生物词汇由拉丁语或希腊语词根构成。一旦学会一些构词成分，你就能自己破译陌生术语。常见前缀：a- / an-（无，如 anaerobic 无氧），auto-（自己，如 autotroph 自养生物），bio-（生命），chloro-（绿），cyto-（细胞），endo-（内），exo-（外），hyper-（高于），hypo-（低于），multi-（多），uni-（一）。常用后缀：-ose（糖类，如 glucose 葡萄糖、sucrose 蔗糖），-ase（酶，如 amylase 淀粉酶、lipase 脂肪酶），-itis（炎症，如 tonsillitis 扁桃体炎），-logy（……学，如 biology 生物学）。
Test yourself with the word autotroph: auto = self, troph = feeding. So an autotroph feeds itself (makes its own food by photosynthesis). Haemophobia: haemo = blood, phobia = fear → fear of blood. Epidermis: epi = upon, dermis = skin → outer layer of skin. Building vocabulary this way is like putting Lego bricks together.
用 autotroph（自养生物）这个词来检验一下：auto = 自己，troph = 喂养，所以自养生物就是自己喂自己（通过光合作用制造食物）。Haemophobia（恐血症）：haemo = 血，phobia = 恐惧 → 对血的恐惧。Epidermis（表皮）：epi = 在……之上，dermis = 皮肤 → 皮肤的最外层。这样记词汇就像搭积木。
12. Active Recall and Spaced Repetition Plan | 主动回忆与间隔重复计划
Reading notes is not enough. Use active recall: cover the definition, say it out loud, then check. Write 10 terms on flashcards (paper or digital) with the word on one side and definition on the other. Shuffle them and test yourself daily. Spaced repetition means revisiting terms at increasing intervals – after 1 day, 3 days, 1 week, 1 month. This forces your brain to strengthen long-term memory connections.
光读笔记是不够的，要使用主动回忆：遮住定义，大声说出来，然后再核对。把 10 个术语写在抽认卡上（纸质或电子都可以），一面写词，另一面写释义。打乱次序，每天自我测试。间隔重复指的是按逐渐延长的间隔来复习——1天后、3天后、1周后、1个月后。这会迫使你的大脑强化长期记忆联结。
Pair difficult words with an unforgettable mental image. For mitosis, visualise a cell making two identical copies – mit two (it makes two). For meiosis, think of me making eggs and sperm – meiosis produces gametes with half the chromosome number. Drawing mind maps linking related terms also anchors vocabulary in a bigger picture.
给难记的词搭配一个难忘的画面。如 mitosis（有丝分裂），可想象一个细胞变成两个一模一样的拷贝——mit two（它产生两个）。对于 meiosis（减数分裂），可以联想成我在制造卵子和精子——减数分裂产生染色体数目减半的配子。绘制思维导图把相关术语联系起来，也能将词汇锚定在更大的知识背景中。
Daily habit: pick 5 terms from your WJEC topic list, use them in sentences, and explain them to a friend or family member. Teaching is the highest form of learning.
每日习惯：从 WJEC 主题清单中挑选 5 个术语，用它们造句，并给朋友或家人讲解。教是最好的学。
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