📚 Year 7 WJEC Science: Essay Writing Framework and Model Answers | Year 7 WJEC 科学：论文写作框架与范文
In Year 7 WJEC Science, you are not only learning about the world around you but also how to communicate your ideas clearly in writing. A short science essay or structured explanation is a powerful way to show that you can think like a scientist. This guide will give you a clear framework for writing a high-quality scientific essay, along with model answers you can learn from.
在七年级 WJEC 科学课程中，你不仅要学习我们周围的世界，还要学会如何用清晰的写作表达你的想法。一篇简短的科学短文或结构化的解释，是展示你能够像科学家一样思考的有力方式。本指南将为你提供一个清晰的科学论文写作框架，以及你可以学习的范文。
1. Why Essay Writing Matters in Science | 为什么科学中需要论文写作
Writing scientifically helps you organise your observations, explain your reasoning and convince others with evidence. In your WJEC assessments, you may be asked to write a short report, describe a trend or argue why one method is better than another.
用科学的方式写作可以帮助你整理观察结果、解释你的思路，并用证据说服他人。在 WJEC 测验中，你可能需要写一份简短的报告，描述一个趋势，或者论证为什么一种方法比另一种更好。
Good scientific writing is precise, logical and based on data. The habit of structuring your ideas will also help you in practical investigations and end-of-topic tests.
优秀的科学写作是精确、有逻辑且基于数据的。将想法组织起来的习惯，也能在实验探究和单元测验中帮到你。
2. Understanding the Question | 理解题目要求
Before you start writing, highlight the command words: 'describe', 'explain', 'compare' or 'evaluate'. Each command word tells you what kind of answer is expected. For example, 'describe' asks you to say what you see, while 'explain' requires you to give scientific reasons.
在动笔之前，先圈出指令词：“描述”、“解释”、“比较”或“评价”。每个指令词都告诉你需要给出什么样的回答。比如，“描述”只需要说出你看到了什么，而“解释”则要求你给出科学原因。
If the question says 'use data from the table', you must quote numbers or refer to the trend shown in the data. Missing this step is one of the most common mistakes in Year 7 science writing.
如果题目要求“使用表格中的数据”，你就必须引用数字，或者指出数据中显示的趋势。忽略这一步是七年级科学写作中最常见的错误之一。
3. The PEEL Paragraph Framework | PEEL 段落框架
The PEEL structure helps you build every paragraph clearly: Point, Evidence, Explanation and Link. Start with a point that answers the question, then support it with evidence from your experiment or data. Next, explain why the evidence supports your point using scientific ideas. Finally, link back to the question or to the next idea.
PEEL 结构可以帮助你清晰地构建每一个段落：观点、证据、解释和连接。先用一个直接回答问题的观点开头，然后用实验或数据中的证据支持它。接着，用科学概念解释为什么证据支持你的观点。最后，回扣问题，或连接到下一个想法。
- Point: State one clear idea. 清楚地陈述一个想法。
- Evidence: Bring in results, measurements or observations. 带入结果、测量值或观察记录。
- Explanation: Use scientific knowledge to explain the evidence. 运用科学知识解释证据。
- Link: Tie it back to the big question or next step. 回到大问题或引出下一步。
Using PEEL stops you from drifting off topic and makes your writing much stronger for WJEC examiners.
使用 PEEL 结构能防止你偏离主题，让你的写作在 WJEC 阅卷人面前更有说服力。
4. Using Scientific Keywords | 使用科学关键词
Every topic in Year 7 science has its own set of keywords, such as 'dissolve', 'variable', 'reaction' or 'force'. Using these words correctly shows that you understand the ideas. Make a list of keywords for each topic and practise writing full sentences with them.
七年级科学的每个主题都有自己的一套关键词，比如“溶解”、“变量”、“反应”或“力”。正确地使用这些词，能表明你理解了相关概念。为每个主题列一张关键词表，并练习用它们写出完整的句子。
Do not just drop keywords randomly. Always explain them: 'The independent variable was the temperature of the water, because that is what we changed.' This approach matches WJEC expectations.
不要只是随意丢出关键词。要始终解释它们：“自变量是水温，因为那是我们改变的条件。”这种方式符合 WJEC 的要求。
5. Structuring a Hypothesis and Prediction | 构建假设与预测
A hypothesis is a scientific idea that can be tested. In Year 7, a simple structure is: 'If [I change this], then [this will happen], because [science reason].' For example: 'If we increase the starting temperature of water, then more sugar will dissolve in it, because particles move faster at higher temperatures.'
假设是一个可以被检验的科学想法。在七年级，一个简单的句型是：“如果[我改变这个]，那么[这个就会发生]，因为[科学原因]。”例如：“如果我们提高水的初始温度，那么就会有更多的糖溶解在其中，因为粒子在较高温度下运动得更快。”
A prediction is a statement of what you think will happen during an experiment. It should be specific and include a direction of change, such as 'increase' or 'decrease'. WJEC examiners look for clearly written hypotheses that link cause and effect.
预测是对实验中你认为会发生的情况做出的陈述。它应该是具体的，并包含变化的方向，比如“增加”或“减少”。WJEC 阅卷人看重的是清晰写出因果关系假设的能力。
6. Writing a Method Section | 撰写方法部分
A good method is like a recipe: another person should be able to follow your steps and get similar results. Write in numbered steps and use imperative verbs like 'measure', 'pour' and 'record'. Always mention the quantities, equipment and how you will keep the experiment fair.
一个好的方法部分就像一份食谱：另一个人应该能够按照你的步骤操作并获得相似的结果。请按编号步骤书写，并使用“量取”、“倒入”、“记录”这样的祈使动词。务必提及数量、设备以及你将如何保持实验的公平性。
Fair testing means you change only one independent variable and keep all other variables the same. In your method, describe briefly how you control the control variables, for example: 'The volume of water was kept at 200 cm³ each time.'
公平测试意味着你只改变一个自变量，而让其他所有变量保持不变。在你的方法中，要简要描述如何控制控制变量，例如：“每次使用的水量都保持在 200 立方厘米。”
7. Presenting Results and Observations | 呈现结果与观察
In WJEC Year 7 science, you will often be asked to present results in a table or a bar chart. A results table must have clear headings with units, e.g. 'Time (s)' and 'Temperature (°C)'. Never forget to include units.
在 WJEC 七年级科学中，你经常会被要求用表格或条形图来呈现结果。结果表必须有带单位的清晰表头，例如“时间/秒”和“温度/°C”。千万不要忘记加上单位。
When you describe a pattern, use comparative language: 'as the temperature increased, the time taken for the tablet to dissolve decreased'. Avoid saying only 'it went down' without stating both variables.
在描述规律时，要使用比较性的语言：“随着温度升高，药片溶解所需的时间缩短了。”避免只说“它下降了”，而不提两个变量。
8. Explaining Results Using Scientific Concepts | 用科学概念解释结果
Explaining is the most important skill in science writing. After you present your evidence, say why the pattern happened using a model or idea you have learned, like the particle model. For example: 'At higher temperatures, water particles have more kinetic energy, so they collide with the sugar particles more often and with more force, making the sugar dissolve faster.'
解释是科学写作中最重要的技能。在呈现证据之后，用你学过的模型或概念来解释为什么会发生这样的规律，比如用粒子模型。例如：“在较高温度下，水粒子具有更大的动能，因此它们更频繁地、更猛烈地与糖粒子碰撞，使糖溶解得更快。”
This way, you are linking data to theory. WJEC mark schemes often give marks for linking an explanation to the specific evidence in the table or graph.
这样你就把数据和理论联系起来了。WJEC 的评分标准通常会给那些将解释与表格或图表中的具体证据相联系的回答加分。
9. Drawing Conclusions and Evaluating | 得出结论与评价
A conclusion should directly answer the initial question and say whether the evidence supports the hypothesis. Use phrases like 'The results show that...' or 'This supports my hypothesis because...' rather than starting with 'We enjoyed the experiment'.
结论应该直接回答最初的问题，并说明证据是否支持假设。要使用“结果表明……”或“这支持了我的假设，因为……”这样的措辞，而不是以“我们很喜欢这个实验”开头。
Evaluation is about identifying limitations and suggesting improvements. Even a simple evaluation like 'We only tested three temperatures; next time we could test five to get a more reliable pattern' demonstrates high-level thinking for Year 7.
评价是指找出实验的局限性并提出改进建议。即使是像“我们只测试了三个温度；下次可以测试五个温度，以得到更可靠的规律”这样简单的评价，也能展示出七年级的高级思维。
10. Model Answer: Example 1 – Dissolving Salt | 范文示例1：溶解盐
The following model answer uses the Year 7 PEEL framework to answer the question: 'How does the temperature of water affect how fast salt dissolves?'
下面的范文使用了七年级 PEEL 框架来回答问题：“水温如何影响盐的溶解速率？”
Hypothesis and aim: The aim of this investigation was to see how water temperature affects the time taken for 5 g of salt to dissolve. I predicted that a higher temperature would lead to a shorter dissolving time, because particles gain energy when heated.
假设与目的：本次探究的目的是观察水温如何影响5克盐溶解所需的时间。我预测，温度升高会导致溶解时间缩短，因为粒子受热后获得了更多的能量。
Method summary: 200 cm³ of water at 20 °C was poured into a beaker. 5 g of salt was added and the mixture stirred at a constant speed until no solid was visible. The stopwatch was stopped as soon as the solution became clear. The experiment was repeated at 40 °C and 60 °C, with all other conditions kept the same.
方法摘要：将200立方厘米20 °C的水倒入烧杯中。加入5克盐，并以恒定的速度搅拌，直到看不见固体。溶液变澄清的瞬间停止秒表。该实验分别在40 °C和60 °C下重复进行，所有其他条件保持不变。
Results: At 20 °C, the salt dissolved in 68 seconds; at 40 °C it took 39 seconds; at 60 °C it took 21 seconds.
结果：在20 °C时，盐于68秒内溶解；40 °C时为39秒；60 °C时为21秒。
Explanation: These results happened because increasing the temperature gives water particles more kinetic energy. They move faster and collide with the salt particles more often, breaking them away from the crystal and carrying them into the solution more quickly. This explains the pattern of decreasing time with higher temperature.
解释：出现这些结果是因为升高温度给水粒子提供了更多的动能。它们运动得更快，更频繁地与盐粒子碰撞，将盐粒子从晶体上剥离并更快地带入溶液中。这就解释了溶解时间随温度升高而缩短的规律。
Conclusion: The evidence clearly supports my hypothesis. The dissolving time got shorter as temperature increased. To improve, I would use a data-logger to record the exact moment of dissolving, because human reaction time might cause a small error.
结论：证据明确支持了我的假设。随着温度升高，溶解时间变短了。为了改进，我会使用数据记录器来记录溶解的精确时刻，因为人的反应时间可能会造成少许误差。
11. Model Answer: Example 2 – Plant Growth | 范文示例2：植物生长
This model answer shows how to write up a simple investigation: 'Do bean seeds grow taller in brighter light?'
这篇范文展示了如何写一份简单的探究报告：“在更明亮的光照下，豆子种子会更高吗？”
Planning: I placed four pots with identical bean seeds on a windowsill at four distances from the window: 0 m, 0.5 m, 1.0 m and 1.5 m. Each pot had the same amount of soil and water. The independent variable was light intensity (changed by distance) and the dependent variable was seedling height after 7 days. I kept the type of seed, amount of water and temperature constant.
计划：我将四盆带有相同豆子种子的花盆放在窗台上，并分别离窗户0米、0.5米、1.0米和1.5米。每个花盆的土壤和水量相同。自变量是光照强度（通过距离改变），因变量是7天后幼苗的高度。我保持种子类型、水量和温度不变。
Results (table data):
| Distance from window (m) | Height after 7 days (cm) |
|---|---|
| 0.0 | 8.5 |
| 0.5 | 7.2 |
| 1.0 | 5.8 |
| 1.5 | 4.3 |
结果（表格数据）：
Pattern description: The seedlings closest to the window grew the tallest. As the distance from the light source increased, the final height decreased steadily.
规律描述：离窗户最近的幼苗长得最高。随着与光源距离的增加，最终高度稳步下降。
Explanation: Plants need light for photosynthesis, the process that makes food and energy for growth. More light energy is available near the window, so those seedlings produced more food and could grow taller. Seedlings farther away received less light and therefore had less energy for growth.
解释：植物需要光来进行光合作用，这个过程为生长制造食物和能量。靠近窗户的光能更多，因此那些幼苗制造了更多食物，可以长得更高。较远处的幼苗接收到的光较少，因此用于生长的能量也较少。
Evaluation: The results support my prediction, but I noticed that the pot at 0 m may have been warmer, which could affect growth. Next time I could measure temperature near each pot to see whether heat was an extra variable. I only used one seed per pot, so growing several seeds and taking an average would make the data more reliable.
评价：结果支持了我的预测，但我注意到0米处的花盆可能更温暖，这可能会影响生长。下次我可以测量每个花盆附近的温度，看看热量是否是一个额外的变量。每个花盆我只用了一粒种子，所以种多粒种子并取平均高度，会让数据更可靠。
12. Proofreading and Editing Checklist | 校对与编辑清单
Before you hand in your essay, go through this final checklist. It is a quick way to lift your marks by avoiding careless mistakes that Year 7 students often make.
在提交你的文章之前，请对照这份最终清单检查一遍。这是通过避免七年级学生常犯的粗心错误来提高分数的快捷方法。
- Have I answered the question? Check that every paragraph links to the task. 我回答问题了吗？检查每个段落是否都与题目相关。
- Are my tables and graphs labelled? Units must follow each heading. 我的表格和图表有标注吗？每个表头后面必须跟有单位。
- Have I explained using science? Make sure you have used the particle model, energy ideas or key vocabulary where relevant. 我用科学原理解释了吗？确保在相关的地方使用了粒子模型、能量概念或关键术语。
- Is my spelling of keywords correct? For example, 'temperature' and 'dissolve' are easy to misspell. 关键词拼写正确吗？例如“temperature”和“dissolve”很容易拼错。
- Have I written in full sentences? No one-word answers or notes. 我写的是完整句子吗？不要只写一个单词或笔记。
Using this checklist will make your writing look more professional and help you hit the top bands on the WJEC mark scheme.
使用这份清单会让你的写作看起来更专业，并帮助你达到 WJEC 评分标准的最高档次。
Published by TutorHao | Science Revision Series | aleveler.com
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