📚 Year 7 WJEC Biology: Exam Techniques and Marking Criteria | 答题技巧与评分标准
In Year 7 WJEC Biology, knowing the content is only half the battle. How you structure your answers, use scientific vocabulary and respond to command words can make a real difference to your marks. This guide breaks down the key exam techniques and explains what examiners look for, so you can approach every question with confidence and pick up every mark available.
在七年级 WJEC 生物考试中，掌握知识只是成功的一半。如何组织答案、使用科学词汇、回应指令词，对最终得分影响重大。本指南将逐一拆解关键答题技巧，并说明考官在评分时看重什么，帮助你自信面对每道题，拿下所有能拿到的分数。
1. Understanding Command Words | 理解指令词
Command words such as 'state', 'describe', 'explain' and 'compare' tell you exactly what the examiner wants. If you ignore the command word, you risk writing a perfect answer that earns zero marks. For example, with 'State the function of the nucleus', a one-word answer like 'control' can be enough. But if the question says 'Describe the role of the nucleus', you need to expand: 'The nucleus contains genetic material and controls the activities of the cell.'
指令词如“state（陈述）”“describe（描述）”“explain（解释）”“compare（比较）”直接告诉你考官想要什么。如果忽视指令词，你写出的完美答案可能一分不得。例如题目要求“State the function of the nucleus（陈述细胞核的功能）”，回答“控制”即可；但如果题目用了“Describe the role of the nucleus（描述细胞核的作用）”，你就必须展开：“细胞核含有遗传物质，控制细胞的活动。”
In Year 7, you will often see 'Describe the trend' or 'Explain why...'. For a graph question, 'describe' means say what you see – numbers go up, down or stay the same. 'Explain' requires you to give a scientific reason, linking cause and effect. When you see 'compare', you must discuss similarities and differences, using comparative words like 'whereas' or 'both have'.
在七年级你常会见到“Describe the trend（描述趋势）”或“Explain why...（解释为什么……）”。对于图表题，“describe”要求你描述所见——数据上升、下降或保持不变。“explain”则要求你给出科学原因，把因果联系起来。遇到“compare”时，你必须讨论相似点和不同点，使用“whereas（然而）”“both have（两者都有）”等比较性词语。
2. Reading the Question Carefully | 仔细阅读题目
Many marks are lost simply because students answer the wrong question. Underline the command word and the keywords in the question. If the question asks you to 'name the organelle that contains cell sap', you must write 'permanent vacuole', not 'stores water'. Both might be true, but only the named organelle matches the wording.
很多失分仅仅是因为学生答非所问。把题目里的指令词和关键词画上横线。如果题目要求“name the organelle that contains cell sap（说出含有细胞液的细胞器名称）”，你必须写“永久液泡”，而不是“储存水分”。两者可能都正确，但只有按要求说出细胞器名称才得分。
Also check whether the question asks for one example or more. 'Give two ways in which a root hair cell is adapted' means you must give exactly two distinct adaptations. Writing three does not give you extra marks, but writing only one will restrict you to half the marks at best. Always match the number requested.
还要看清题目是要求举一个例子还是多个。“Give two ways in which a root hair cell is adapted（写出根毛细胞的两项适应性特征）”意味着你必须正好给出两个不同的适应特征。写三个不会给你额外加分，但只写一个最多只能拿一半的分数。始终要按照题目要求的数量作答。
3. Using Scientific Terminology | 使用科学术语
Examiners expect you to use precise scientific language. Instead of writing 'the jelly-like stuff inside the cell', you should write 'cytoplasm'. Instead of 'the cell's brain', use 'nucleus'. Every correct term shows the examiner that you understand the biology, not just everyday descriptions. Spelling does not have to be perfect, but the word must be recognisable.
考官希望你能使用准确的科学语言。不要写“细胞里那种果冻一样的东西”，而应该写“细胞质”。不要用“细胞的大脑”，而要用“细胞核”。每个正确的术语都在告诉考官：你理解的是生物学概念，而不是日常描述。拼写不一定要完美，但必须能辨认出这个词。
For processes, always use the proper names: 'photosynthesis', not 'making food using light'; 'respiration', not 'getting energy from food'. In WJEC mark schemes, marks are often reserved for the correct term, even if your description is otherwise accurate. Start building a glossary of key words as you revise.
对于生理过程，一定要用正式名称：“photosynthesis（光合作用）”，而不是“用光制造食物”；“respiration（呼吸作用）”，而不是“从食物中获取能量”。在 WJEC 评分方案中，即使你的描述大致正确，也常常会为正确的术语专门留出分数。复习时就要开始建立自己的关键词词汇表。
4. Structuring Your Answers | 组织答案结构
Longer questions need a clear logical order. When explaining a process like diffusion, begin by identifying what diffusion is: 'Diffusion is the net movement of particles from an area of high concentration to an area of low concentration.' Then explain why it is passive, and finally give an example in a living organism, such as oxygen moving into blood cells. A well-structured answer mirrors the natural sequence of events.
长问题需要清晰的逻辑顺序。解释像扩散这样的过程时，先说明扩散是什么：“扩散是粒子从高浓度区域向低浓度区域的净移动。”然后解释为什么它是被动的，最后给出生物体内的例子，比如氧气进入血细胞。结构良好的答案可以反映出事件的天然顺序。
If the question says 'Explain why a plant wilts without enough water', begin with the role of water in keeping plant cells turgid. Then link lack of water to reduced turgor pressure, which causes the cells to become flaccid. Finish with the visible effect – the plant droops. Never jump straight to the drooping without the biological chain of reasoning.
如果题目说“Explain why a plant wilts without enough water（解释为什么植物缺水会萎蔫）”，首先讲述水在维持植物细胞膨压中的作用，然后联系缺水导致膨压降低，细胞变得松弛，最后落到可见效果——植株下垂。绝对不能跳过生物学推理链条，直接写“植株下垂”。
5. Answering Data-Based Questions | 回答图表数据题
Data questions often carry several marks and require you to read values accurately. Start by stating a general pattern: 'As the amount of light increases from 2 hours to 10 hours, the height of the plant increases.' Then support with specific numbers: 'At 2 hours of light, the height was 5 cm, whereas at 10 hours it reached 18 cm.' Using 'whereas' helps highlight the contrast and shows you can compare data points.
数据题往往占好几分，要求你准确读取数值。先描述整体规律：“当光照时间从2小时增加到10小时，植株高度增加。”然后用具体数据支撑：“光照2小时时高度为5 cm，而10小时时高度达到18 cm。”使用“而（whereas）”有助于突出对比，表明你能比较数据点。
Always include units. If the graph axis shows 'Height (cm)', your answer must say '18 cm', not just '18' a: (final value - initial value) ÷ initial value × 100 for percentage change, if required.
一定要带上单位。如果坐标轴显示“高度 (cm)”，你的答案必须写“18 cm”，不能只写“18”。遇到计算题，一定要写出运算步骤。即便最终答案错了，考官可能因为正确的方法给分。若要求计算百分比变化，可使用公式：(终值 - 初值) ÷ 初值 × 100。
6. Drawing and Labelling Diagrams | 绘制与标注图表
When asked to draw a plant or animal cell, use a sharp pencil and draw clean, continuous lines. Do not shade or colour. The drawing should be large enough to label clearly – at least half a page. Label lines must be drawn with a ruler and must not cross each other. Each label line should touch the structure it identifies. Common labels for Year 7 include: cell wall, cell membrane, cytoplasm, nucleus, chloroplast, permanent vacuole.
如果要求画植物或动物细胞，请使用削尖的铅笔，画出干净、连续的线条。不要上色或涂阴影。图要画得足够大，以便清晰标注——至少半页纸。标注引线必须用直尺画出，不能相互交叉。每条引线应触及它所标识的结构。七年级常见的标注包括：细胞壁、细胞膜、细胞质、细胞核、叶绿体、永久液泡。
In a diagram of a food chain or a flower, the same rules apply: clarity over artistic merit. For a flower, you might label petals, stamen, carpel and sepals. Check your spelling on labels, because misspelled terms like 'nuclus' instead of 'nucleus' can lose the mark even if the line points to the right place.
在画食物链或花朵图示时，规则同样适用：清晰比美观重要。画花朵时，你可以标注花瓣、雄蕊、雌蕊和花萼。检查标注的拼写，像把“nucleus”写成“nuclus”这类拼写错误，即使引线指对了位置，也可能丢分。
7. Describing Trends and Patterns | 描述趋势与模式
When a question asks you to describe a trend, avoid simply restating what you see without structure. Use sentences like: 'From 0 °C to 37 °C, the enzyme activity rose steadily. The activity peaked at 37 °C and then fell sharply as the temperature increased further.' Comparative phrases such as 'more rapidly', 'slightly decreased' and 'remained constant' show a high level of observation.
当题目要求描述趋势时，避免只是没有结构地复述所见。用这样的句子：“从0 °C到37 °C，酶活性稳定上升。活性在37 °C时达到峰值，之后随着温度进一步升高急剧下降。”像“更迅速地”“轻微下降”“保持恒定”这样的比较性短语，能体现出高水平的观察力。
If you notice an unusual data point – for instance, one bar in a bar chart is much shorter than expected – mention it. 'Most samples grew well, but the plant given 2 g of fertiliser showed an unexpected drop in height, possibly due to over-fertilisation.' This shows critical thinking and can earn extra marks for evaluation.
如果你发现某个异常数据点——例如柱状图中有一根柱子比预期矮很多——应当指出来。“大多数样本生长良好，但施用2 g肥料的植株高度意外下降，可能是由于过量施肥。”这展现出批判性思维，可能为你赢得评价分。
8. Explaining Processes | 解释过程
Explanation questions often start with 'Explain why...' or 'Explain how...', and they require more than a list of facts. In photosynthesis, for example, you must state the raw materials, the conditions needed and the products. A full answer might be: 'Plants use carbon dioxide (CO₂) and water (H₂O), in the presence of light energy and chlorophyll, to produce glucose (C₆H₁₂O₆) and oxygen (O₂).' Then link it to the plant's use of glucose for energy and growth.
解释题通常以“解释为什么……”或“解释……如何……”开头，需要的不仅仅是罗列事实。以光合作用为例，你必须说明原料、所需条件和产物。完整答案可以是：“植物利用二氧化碳和水，在光能和叶绿素的参与下，生成葡萄糖和氧气。”接着把葡萄糖与植物获得能量和生长联系起来。
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
correctly in every exam: carbon dioxide + water → glucose + oxygen. The arrow must be present, and the words must be spelled correctly enough to be understood.
七年级可能不要求配平的符号方程式，但使用它可以给考官留下好印象。不过，每次考试你都必须能正确写出文字方程式：二氧化碳 + 水 → 葡萄糖 + 氧气。必须画出箭头，词语拼写至少要能辨认。
9. Avoiding Common Mistakes | 避免常见错误
One frequent error is confusing cell wall and cell membrane. Remember: the cell wall is a rigid outer layer found only in plant cells, made of cellulose. The cell membrane is a thin, selectively permeable structure found in all cells, controlling what enters and leaves. Drawing and labelling them correctly in diagrams is essential.
一个常见错误是混淆细胞壁和细胞膜。记住：细胞壁是仅存在于植物细胞中的坚硬外层，由纤维素组成；细胞膜是所有细胞都有的薄而具有选择透过性的结构，控制物质进出。在图中正确地绘制并标注二者至关重要。
rows in a food chain pointing the wrong way. Arrows must show the direction of energy flow – u imply energy flows backwards, which is biologically incorrect and loses all the marks for that chain.
另一个错误是在食物链中箭头方向画反。箭头必须表示能量流动的方向——从被吃掉的生物指向吃掉它的生物。因此，青草 → 兔子 → 狐狸。如果你把箭头反过来，意味着能量逆向流动，这在生物学上是错误的，整个食物链的分数都会丢掉。
10. Managing Your Time | 管理答题时间
A good rule is to spend about one minute per mark. If a question is worth 3 marks, aim to spend roughly 3 minutes on it. This stops you from spending too long on a low-mark question and running out of time for the high-mark sections later. Wear a watch and check the clock every few questions.
一个好的原则是每个分值分配约一分钟。如果一道题值3分，力争花3分钟左右完成。这样就不会在低分题上耗时过久，导致后面高分部分时间不够。戴好手表，每隔几题看一眼时间。
Always read through the whole paper at the start. Answer the easiest questions first to build momentum and secure quick marks. Circle any questions you find tricky and come back to them. Leaving a question blank guarantees zero marks, but even a partial attempt can earn some credit.
一开始先通读整份试卷。先做最简单的题目，建立信心并快速拿下分数。把觉得棘手的题圈出来，回头再做。留白肯定一分不得，但即使只写出部分内容，也可能得到一些步骤分。
11. Checking Your Work | 检查答案
Reserve the last 5–10 minutes for checking. Re-read each question and your answer side by side. Ask yourself: Did I use the exact command word? Did I include the correct scientific term? Are my numbers followed by units? For diagram questions, are all label lines present and correctly spelled?
留出最后5–10分钟用于检查。把题目和你的答案并排，重新读一遍。问自己：我用对指令词了吗？包含了正确的科学术语吗？数字后面带单位了吗？绘图题里，所有引线都画好了吗，拼写都对吗？
It is also worth checking for silly spelling errors in key terms. Writing 'vacuole' as 'vackuole' or 'mitochondria' as 'mitocondria' may still get the mark if the meaning is clear, but correct spelling removes any doubt. If you have time, tidy up your handwriting – examiners can only reward what they can read.
还值得检查关键词有没有愚蠢的拼写错误。把“vacuole（液泡）”写成“vackuole”或“mitochondria（线粒体）”写成“mitocondria”，如果意思清楚也许还能得分，但拼写正确就毫无风险。如果有时间，把字迹写清楚——考官只能给看得懂的内容加分。
12. Understanding Mark Schemes | 理解评分方案
WJEC mark schemes often break down a question into distinct marking points. For a question about diffusion, the points might be: 'particles move', 'from high to low concentration', 'passive / no energy required', and 'example given'. Writing a long paragraph that misses one of these elements may only attract half the marks. Treat each bullet in the mark scheme as a mini-question you must answer.
WJEC 的评分方案常把一道题分解成若干个独立的得分点。例如一道关于扩散的题，得分点可能是：“粒子移动”“从高浓度到低浓度”“被动 / 不需要能量”“给出例子”。写了一大段却漏掉其中一点，可能只能拿到一半的分。要把评分方案中的每一点都看作一个小问题来回答。
When practicing past papers, have the mark scheme next to you. Compare your answer against the expected points. You will quickly notice patterns: for instance, any 'evaluate' question expects both advantages and disadvantages, and a balanced conclusion. This insight helps you write mark-scheme-friendly answers during the real exam.
做历年真题时，把评分方案放在旁边，将自己的答案和期望的得分点进行对照。你很快就会发现规律：例如所有“evaluate（评价）”题都要求写出优点和缺点并给出平衡的结论。这种洞察力能帮助你在真正考试中写出贴合评分方案的答案。
Published by TutorHao | Biology Revision Series | aleveler.com
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