📚 Year 7 WJEC Biology: Essay Writing Framework and Sample | 七年级 WJEC 生物：论文写作框架与范文
Welcome to the WJEC Year 7 Biology essay writing guide. In science, writing is just as important as experimenting. A well-structured essay helps you communicate your findings clearly and earn high marks. This article provides a step-by-step framework and a sample essay to help you master scientific writing for your biology assignments.
欢迎阅读 WJEC 七年级生物论文写作指南。在科学中，写作与实验同等重要。结构良好的论文能帮助你清晰地传达研究发现并获得高分。本文提供了一个循序渐进的框架和一篇范文，助你掌握生物作业的科学写作。
1. Understanding a Scientific Essay | 理解科学论文
A scientific essay in biology is not a story or a personal opinion. It is an objective explanation of an investigation, supported by evidence. You need to present a clear question, describe how you tested it, show your data, and explain what it means. This type of writing trains you to think like a scientist, focusing on facts, patterns and logical reasoning rather than creative flourishes.
生物科学论文不是故事或个人观点，而是基于证据对研究的客观解释。你需要提出明确的问题，描述测试方法，展示数据，并解释其含义。这类写作训练你像科学家一样思考，专注于事实、规律和逻辑推理，而非华丽的辞藻。
2. Key Components of a WJEC Biology Essay | WJEC 生物论文的关键组成部分
Every Year 7 biology essay should be built around a standard set of sections, much like a recipe. The core components are: Title, Introduction, Hypothesis, Materials, Method, Results, Discussion, Conclusion and References. Sticking to this order makes your work easy to follow and ensures you do not miss out on important marks for structure.
每篇七年级生物论文都应围绕一套标准的部分来构建，就像一份食谱。核心组成部分包括：标题、引言、假设、材料、方法、结果、讨论、结论和参考文献。遵循这个顺序可以让你的论文易于理解，并确保你不会因为结构问题而丢失重要的分数。
3. Title and Research Question | 标题与研究问题
The title must be concise yet specific, often capturing the independent and dependent variables you are investigating. For example, "Investigating how light intensity affects the rate of photosynthesis in pondweed" immediately tells the reader what was changed and what was measured. Avoid vague titles like "Plant experiment".
标题必须简洁而具体，通常要体现出你正在研究的自变量和因变量。例如，“探究光照强度如何影响水草的光合作用速率”立刻让读者知道了改变的是什么以及测量的是什么。避免使用“植物实验”这样模糊的标题。
4. Introduction: Setting the Scene | 引言：背景铺垫
The introduction provides the scientific background needed to understand your investigation. You should explain key terms, mention what previous studies or textbook knowledge suggests, and clearly state your aim. For instance, if you are testing seed germination, briefly explain what germination is and why light might matter.
引言提供了理解你的研究所需要的科学背景。你应当解释关键术语，提及其他研究或教科书知识表明了些什么，并清楚地陈述你的目的。例如，如果你在测试种子发芽，要简要说明什么是发芽以及为什么光照可能很重要。
5. Hypothesis: Making a Prediction | 假设：做出预测
A hypothesis is a testable prediction written in an "If ... then ... because ..." format. It must be based on the science you just discussed in the introduction. Example: "If cress seeds receive light, then a higher percentage will germinate compared with seeds kept in darkness, because light provides energy that triggers growth." Never write a guess without a scientific reason.
假设是一个可验证的预测，用“如果……那么……因为……”的格式书写。它必须基于你在引言中讨论过的科学知识。例如：“如果水芹种子接受光照，那么与保存在黑暗中的种子相比，将有更高比例的种子发芽，因为光提供了触发生长的能量。”千万不要写没有科学理由的猜测。
6. Materials and Method: A Clear Recipe | 材料与方法：清晰的步骤
List all the equipment and materials you used, including quantities. For the method, write numbered steps in the past tense and passive voice, as if describing what was done. For example: "1. Two plant pots were filled with 100 g of potting soil each. 2. Ten cress seeds were spaced evenly on the surface of the soil in each pot." Another student should be able to repeat your experiment exactly by following your method.
列出你使用的所有设备和材料，包括数量。对于方法，使用过去时和被动语态写出编号步骤，如同描述已经完成的事情。例如：“1. 两个花盆各装入 100 克盆栽土。2. 每盆土壤表面均匀摆放 10 粒水芹种子。”另一个学生应当能够按照你的方法精确重复你的实验。
7. Results: Presenting Data | 结果：呈现数据
Record your results clearly, often using a table. Then write a short description of the trends you see, without explaining why they happened. For a germination experiment, your table might look like this:
清晰地记录你的结果，通常使用表格。然后写一段你看到的趋势的简短描述，而不用解释为什么会发生。对于一个发芽实验，你的表格可能如下：
| Light Condition | Number of seeds germinated (out of 20) | Average shoot length (cm) |
|---|---|---|
| Full light | 18 | 4.5 |
| Darkness | 5 | 1.2 |
The table shows that seeds in full light had a much higher germination count and longer shoots than those in darkness. The data suggests a clear difference between the two conditions.
该表格显示，全光照条件下的种子发芽数量远多于黑暗中的种子，且幼苗长度也更长。数据表明两种条件之间存在明显差异。
8. Discussion: Explaining Findings | 讨论：解释发现
The discussion is where you interpret your results using scientific reasoning. Explain whether the data supports your hypothesis. For example, the results supported the hypothesis because light is needed for photosynthesis, which provides energy for growth. Also mention any anomalies or possible errors, such as a blocked water supply or temperature differences, and suggest improvements for next time.
讨论部分是你运用科学推理解释结果的地方。说明数据是否支持你的假设。例如，结果支持了假设，因为光是光合作用所必需的，而光合作用为生长提供能量。还要提及任何异常值或可能的误差，比如供水受阻或温度差异，并建议下次如何改进。
9. Conclusion: Summing Up | 结论：总结
A strong conclusion briefly states what you found and whether your hypothesis was correct. It does not introduce new information. For instance: "In conclusion, exposing cress seeds to light significantly increased germination and shoot growth, which supports the hypothesis. Future work could test different colours of light."
一个有力的结论需简要陈述你的发现以及假设是否正确，但不引入新信息。例如：“总之，让水芹种子接受光照显著提高了发芽率和幼苗生长，这支持了假设。未来的研究可以测试不同颜色的光。”
10. References and Avoiding Plagiarism | 参考文献与避免抄袭
Always credit the sources of information you used to write your introduction or to support your discussion. For books, include author, year, title and publisher. For websites, give the URL and the date you accessed it. Never copy sentences directly from a source without quotation marks and a citation; that is plagiarism.
始终要注明你撰写引言或支持讨论部分所使用的信息来源。对于书籍，包括作者、年份、书名和出版社。对于网站，给出网址和你访问的日期。切勿在没有引号和引用的情况下直接抄袭句子，那属于抄袭。
11. A Full Sample Essay: The Effect of Light on Seed Germination | 完整范文：光照对种子发芽的影响
Title: Investigating how light affects the germination and early growth of cress seeds.
标题：探究光照如何影响水芹种子的发芽与早期生长。
Introduction: Germination is the process by which a seed begins to sprout and grow into a seedling. Plants need energy for this process, and many textbooks state that light is involved in activating certain plant hormones. The aim of this investigation was to find out if cress seeds germinate better in light or in darkness.
引言：发芽是种子开始萌出并长成幼苗的过程。植物需要能量来完成这一过程，许多教科书指出光照参与激活某些植物激素。本次研究的目的是找出水芹种子在光照下还是在黑暗中发芽更好。
Hypothesis: If cress seeds are placed in full daylight, then a greater number will germinate and the shoots will grow taller compared with seeds kept in a dark cupboard, because light provides the energy that triggers growth.
假设：如果把水芹种子放在全日照下，那么与保存在暗橱中的种子相比，将有更多种子发芽且幼苗长得更高，因为光照提供了触发生长的能量。
Materials: 20 cress seeds, two identical plant pots, 200 g of potting soil, 50 ml of water, a ruler, a notebook, and a dark cupboard.
材料：20 粒水芹种子、两个相同的花盆、200 克盆栽土、50 毫升水、一把直尺、一个笔记本和一个暗橱。
Method: 1. Each pot was filled with 100 g of soil. 2. Ten seeds were placed evenly on the soil surface in each pot. 3. Both pots were given 25 ml of water. 4. Pot A was placed on a windowsill receiving daylight; Pot B was placed in a dark cupboard. 5. The pots were checked daily, and the number of germinated seeds and shoot lengths were recorded after 7 days.
方法：1. 每盆装入 100 克土壤。2. 每盆土壤表面均匀放置 10 粒种子。3. 两盆均浇 25 毫升水。4. A 盆放在接受日光的窗台上；B 盆放入暗橱中。5. 每天检查花盆，7 天后记录发芽种子数和幼苗长度。
Results: See the table below for the recorded data.
结果：记录的数据见下表。
| Condition | Seeds germinated (out of 10) | Average shoot length (cm) |
|---|---|---|
| Light (Pot A) | 9 | 5.2 |
| Darkness (Pot B) | 3 | 1.5 |
Pot A showed 9 out of 10 seeds germinated with an average shoot length of 5.2 cm, while Pot B had only 3 germinated seeds and a much shorter average length of 1.5 cm.
结果描述：A 盆 10 粒种子中有 9 粒发芽，平均茎长 5.2 厘米，而 B 盆只有 3 粒发芽，平均茎长仅 1.5 厘米。
Discussion: The results clearly support the hypothesis. Light allowed the seeds to produce food through photosynthesis once the first leaves appeared, which fuelled faster growth. The seeds in darkness germinated poorly and were pale and leggy, which is a known response called etiolation. One possible source of error was that the dark cupboard might have been slightly warmer than the windowsill, which could have affected results. In future, temperature should be controlled by placing both pots in rooms at exactly 20 °C.
讨论：结果明确支持了假设。光照使得种子在第一片叶子出现后能通过光合作用制造养料，从而加速了生长。黑暗处的种子发芽很差且呈现苍白徒长，这是一种已知的徒长反应。一个可能的误差来源是暗橱可能比窗台稍暖，这可能会影响结果。将来应通过把两盆放在恰好 20 °C 的房间里来控制温度。
Conclusion: Light significantly improved both the number of germinated cress seeds and the growth of shoots. The hypothesis was therefore supported. For further study, testing different durations of light exposure could be explored.
结论：光照显著提高了水芹种子的发芽数量和幼苗生长，因此假设得到支持。为了进一步研究，可以探究不同光照时长的影响。
References: BBC Bitesize, 'Germination', accessed January 2025. [www.bbc.co.uk/bitesize/topics/zvrrd2p]; Roberts, M.B.V., Biology for Schools, Pearson, 2020.
参考文献：BBC Bitesize，“发芽”，2025 年 1 月访问。[www.bbc.co.uk/bitesize/topics/zvrrd2p]；Roberts, M.B.V.，《学校生物学》，培生出版社，2020 年。
12. Top Tips for Success | 成功秘诀
Always plan your essay before you start writing. Use the framework headings as a checklist. Write in clear, simple English and keep your sentences short. Check that your method describes exactly what you did, and that your conclusion matches your results. Finally, proofread for spelling and punctuation errors – small mistakes can distract from excellent science.
动笔前始终要先规划你的论文，把框架标题当作检查表。使用清晰简单的英语，句子要简短。检查你的方法是否准确描述了你所做的事情，结论是否与结果一致。最后，校对标点符号和拼写错误——小错误可能分散对你出色科学内容的关注。
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