📚 Year 7 CCEA Chemistry: Answering Techniques & Marking Criteria | 7年级 CCEA 化学：答题技巧与评分标准
Mastering Year 7 CCEA Chemistry is not just about knowing the facts; it is about understanding how to present your knowledge in the way examiners expect. The mark scheme rewards clear, well-structured answers that use correct scientific language and directly address the command words. This article breaks down the essential answering techniques and explains the marking criteria for typical questions, including state and describe, explain, diagram-based, and calculation problems. By learning to think like an examiner, you can transform a good grasp of chemistry into consistently high scores.
掌握 7 年级 CCEA 化学不仅仅是记住知识点，更在于学会按照考官期望的方式呈现你的知识。评分标准奖励那些清晰、结构良好、使用正确科学术语并直接回应指令词的答案。本文将详细拆解必备的答题技巧，解释常见题型（如陈述与描述、解释、图表题和计算题）的评分标准。通过学习像考官一样思考，你可以将对化学的良好理解转化为持续稳定的高分。
1. Decoding Command Words | 解读指令词
The command word at the start of a question tells you exactly what kind of answer is needed. CCEA mark schemes allocate marks for specific actions. For example, ‘State’ requires a short, factual answer, often only one or two words. ‘Describe’ asks you to give a detailed account of what is observed or what happens, without explaining why. ‘Explain’ goes one step further: you must give reasons or causes, often using scientific principles like the particle model. Mixing these up is one of the most common reasons for losing marks.
题目开头的指令词精确地告诉你需要给出什么类型的答案。CCEA 的评分标准为特定行为分配分数。例如，“State”（陈述）要求给出简短的事实答案，通常只需要一两个词。“Describe”（描述）要求你详细叙述观察到的现象或发生的经过，但不解释原因。“Explain”（解释）更进一步：你必须给出理由或原因，通常要运用粒子模型等科学原理。混淆这些指令词是失分最常见的原因之一。
To respond correctly, underline the command word as you read the question. If the question says ‘State the name of the gas produced when magnesium reacts with acid,’ you simply write ‘hydrogen’. No extra explanation is needed, and adding one will not gain extra marks but costs time. If the question says ‘Describe what you would see when magnesium reacts with acid,’ you should write about effervescence, the metal disappearing, and the solution getting warmer, but not about the chemical equation unless asked.
为了正确回应，阅读题目时请在指令词下划线。如果问题是“陈述镁与酸反应时生成气体的名称”，你只需写下“氢气”。无需额外解释，添加解释不会加分反而浪费时间。如果问题是“描述镁与酸反应时你会看到的现象”，你应当写冒泡、金属消失、溶液升温，但除非题目要求，不必写化学方程式。
Other common command words include ‘Name’ (identical to state for objects or substances), ‘Complete’ (fill in a blank in a sentence or table), ‘Compare’ (point out similarities and differences, using linking words like ‘whereas’), and ‘Calculate’ (show working and give a numerical answer with units). Each word triggers a different set of marking points, so treat them as a guide to your answer structure.
其他常见指令词包括“Name”（命名，与陈述物体或物质相同）、“Complete”（完成，填补句子或表格中的空白）、“Compare”（比较，指出相同点和不同点，使用“whereas”等连接词）以及“Calculate”（计算，写出过程并给出带单位的数值答案）。每个词都会触发不同的评分点组合，因此要将它们视为答案结构的指南。
2. The Art of Describing: Using Precise Language | 描述的艺术：使用精确的语言
Description questions in Year 7 Chemistry often focus on state changes, separation techniques, or observable signs of a reaction. Examiners look for specific, observable detail, not vague statements. For instance, ‘the solid dissolved’ is better than ‘it disappeared’, and ‘a colourless gas was given off’ is better than ‘bubbles came out’. The mark scheme usually gives a point for each correct observation, and being precise ensures you collect every one.
7 年级化学的描述题通常集中在状态变化、分离技术或反应的可观察迹象。考官寻找的是具体、可观察的细节，而非模糊的陈述。例如，“固体溶解了”比“它消失了”更好，“冒出无色气体”比“冒泡了”更好。评分标准通常为每条正确观察给一分，表述精确能确保你收集到每一分。
When describing changes of state, always include the start and end states and the energy process involved. For melting, you would say: ‘The solid ice gains energy, its temperature rises to 0°C, and it turns into liquid water’. Notice how this uses key scientific terms: solid, liquid, energy, temperature. CCEA mark schemes specifically award marks for using such vocabulary correctly. Similarly, when describing filtration, do not just say ‘the sand stays behind’; say ‘the insoluble sand residue remains on the filter paper while the clear filtrate collects in the flask’.
在描述状态变化时，要始终包含起始和结束状态以及涉及的能量过程。对于熔化，你可以说：“固体冰获得能量，温度升至0°C，转变为液态水。”注意这里使用了关键科学术语：固体、液体、能量、温度。CCEA 评分标准会专门为正确使用这类词汇而给分。同样，在描述过滤时，不要只说“沙子留下来了”；要说“不溶性沙子残渣留在滤纸上，而清澈的滤液收集在烧瓶中”。
For reactions, link your observations to the reactants and products without necessarily naming them in a description. A strong answer: ‘When magnesium ribbon is added to hydrochloric acid, effervescence occurs, the magnesium ribbon gets smaller and eventually disappears, and colourless gas is released. When tested with a lit splint, the gas pops, showing it is hydrogen.’ Note how the description stays purely observational but includes the splint test as part of the procedure, which often attracts an extra mark.
对于反应，观察要联系反应物和产物，但描述中不必非得说出它们的名称。一个强有力的答案：“将镁条加入盐酸中，发生冒泡，镁条逐渐变小并最终消失，同时释放出无色气体。用燃着的木条测试，气体发出爆鸣声，表明这是氢气。”注意该描述完全基于观察，但将燃烧木条测试作为步骤的一部分，这一点经常能获得额外加分。
3. Crafting Explanations That Score Full Marks | 打造得满分的解释题答案
Explanation questions target your understanding of why something happens, not just what happens. The CCEA mark scheme demands a cause-and-effect chain, often using the particle model as evidence. A typical question might be: ‘Explain why a balloon filled with air expands when heated.’ A common incomplete answer: ‘Because heat makes particles move.’ To gain full marks, you need to say: ‘The air particles gain kinetic energy, move faster and further apart, so the volume of the air increases, causing the balloon to expand.’ This connects heat to particle energy, movement, spacing, volume, and the final observation.
解释题考查的是你对为什么会发生某件事情的理解，而不仅仅是发生了什么。CCEA 的评分标准要求有因果链条，通常以粒子模型作为证据。一个典型问题可能是：“解释为什么充满空气的气球受热后会膨胀。”常见的半对答案是：“因为热使粒子运动。”要获得满分，你需要说：“空气粒子获得动能，运动得更快且彼此间距更大，因此空气体积增大，导致气球膨胀。”这就把热量与粒子能量、运动、间距、体积以及最终观察联系了起来。
Always use the word ‘because’ or ‘so’ to signal the causal link. If the question says ‘Use the particle theory to explain…’, you must explicitly mention particles or molecules. For state changes, mention how energy breaks or weakens attractive forces between particles. For example: ‘In melting, the solid particles gain energy, vibrate more vigorously until they overcome the strong forces holding them in fixed positions, and they become able to slide past one another as a liquid.’
始终使用“因为”或“所以”来暗示因果关系。如果题目说“用粒子理论来解释……”，你必须明确提及粒子或分子。对于状态变化，要提及能量如何打破或削弱粒子间的引力。例如：“在熔化过程中，固体粒子获得能量，振动得更剧烈，直到它们克服了将它们束缚在固定位置的强大引力，从而能够相互滑动，变成液体。”
Many Year 7 explanations revolve around conservation of mass, dissolving, and diffusion. For dissolving: ‘The water particles attract and surround the solute particles, pulling them away from the solid surface and spreading them evenly throughout the liquid. This is why the solid seems to disappear but actually the mass is conserved.’ This type of answer directly matches the marking points: attraction, separation, uniform spreading, conservation of mass.
7 年级的许多解释题都围绕质量守恒、溶解和扩散展开。对于溶解：“水粒子吸引并包围溶质粒子，将它们从固体表面拉开，并均匀分散在液体中。这就是为什么固体看似消失，但实际上质量保持不变的原因。”这类答案直接命中了评分点：吸引、分离、均匀分散、质量守恒。
4. Experiment-Based Questions: Observations, Conclusions, Evaluations | 实验题：观察、结论与评价
CCEA practical questions often present an experimental setup and ask you to predict, record, or interpret results. The mark scheme splits marks between what you would see (observation), what it means (conclusion), and sometimes how to improve the experiment (evaluation). Never jump to the conclusion before listing the raw observations, even if the link seems obvious to you.
CCEA 的实验题通常会给出一个实验装置，然后让你预测、记录或解释结果。评分标准将分数分配给你会看到什么（观察）、它意味着什么（结论），有时还包括如何改进实验（评价）。即使联系对你来说显而易见，也永远不要在没有列出原始观察前就跳到结论。
Take a chromatography question as an example. Observation: ‘There are three coloured spots on the chromatography paper, one blue spot at the starting line, one yellow spot higher up, and a red spot near the solvent front.’ Conclusion: ‘The original ink is a mixture of at least three different dyes, because the separated components moved different distances.’ If the question asks for an evaluation: ‘To make the spots clearer, we could use a more concentrated sample or allow the solvent to run for a longer time.’ Each part answers a different layer of the mark scheme.
以色谱法问题为例。观察：“色谱纸上有三个色斑，起点线上有一个蓝色斑点，较高位置有一个黄色斑点，溶剂前沿附近有一个红色斑点。”结论：“原始墨水是至少三种不同染料的混合物，因为这些分离组分移动的距离不同。”如果题目要求评价：“为了让斑点更清晰，我们可以使用更浓的样品或让溶剂运行更长时间。”每个部分都对应评分标准的不同层次。
When asked to evaluate an experiment, think about reliability (repeat measurements), accuracy (smaller measuring divisions, more precise instruments), and control of variables (keeping the same volume of water, same temperature). For example: ‘The experiment could be improved by insulating the beaker to reduce heat loss, using a digital thermometer for more accurate readings, and repeating the measurement three times to calculate an average.’ These practical improvement points are explicitly listed in CCEA mark schemes under evaluation marks.
当要求评价实验时，请考虑可靠性（重复测量）、准确性（更小的测量刻度、更精密的仪器）以及变量控制（保持相同的水量、相同的温度）。例如：“可以通过给烧杯加保温层来减少热量损失、使用数字温度计来获得更精确的读数，并重复测量三次取平均值来改进这个实验。”这些实际的改进点明确列在 CCEA 评分标准的评价分项下。
5. Diagrams and Labelling: Do’s and Don’ts | 图表与标注：该做什么和不该做什么
Drawing equipment diagrams is a common task in Year 7 CCEA Chemistry papers, especially for separation techniques like filtration, distillation, or evaporation. The marking criteria focus on accuracy, neatness, and correct labelling. Always use a sharp pencil and a ruler for straight lines. Draw in 2D cross-section style; do not sketch artistic 3D views. For apparatus like a beaker, draw the liquid level with a flat line, not a curve, unless the question specifically asks for a meniscus.
绘制仪器图是 7 年级 CCEA 化学试卷中的常见任务，特别是在过滤、蒸馏或蒸发等分离技术中。评分标准注重准确性、整洁度和正确的标注。务必使用削好的铅笔和直尺画直线。采用二维截面图风格；不要画成艺术的 3D 图。对于烧杯等仪器，液面要用直线画出，不要画成曲线，除非题目特别要求画弯月面。
Marks are awarded for the correct arrangement of apparatus, not for artistic quality, but clarity is essential. For filtration, the key marking points are: filter funnel correctly placed in a conical flask, filter paper visible inside the funnel, mixture poured along a glass rod touching the side of the filter paper, and the filtrate collected in the flask. Do not forget to label each item with a straight ruling line, not an arrow, with the label written horizontally. CCEA penalises sloppy labelling that crosses over lines or uses arrows.
仪器的正确布置会得分，而不是艺术质量，但清晰度至关重要。对于过滤，关键给分点是：漏斗正确放置在锥形瓶中，滤纸可见并置于漏斗内，混合物沿玻璃棒引流且玻璃棒接触滤纸一侧，滤液收集在烧瓶中。不要忘记用直尺引线标注每件物品，不要用箭头，标签要水平书写。CCEA 会扣罚潦草的标注，如线条交叉或使用箭头的情况。
In heating setups, show the Bunsen burner with a clear air hole and a blue flame when heating is required. The tripod, gauze, and evaporating basin or beaker should be correctly assembled. If you forget to put heat-proof mat under the Bunsen burner, you may lose a safety mark. Always check that your diagram matches the procedure described in the question, and add a title such as ‘Apparatus for filtration’ if the mark scheme allows an extra communication mark.
在加热装置中，需要加热时要画出带有明显气孔的 Bunsen 灯，并画出蓝色火焰。三脚架、铁网和蒸发皿或烧杯应正确组装。如果你忘记在 Bunsen 灯下放置隔热垫，可能会失掉一个安全分。始终检查你的图是否符合题目描述的操作流程，如果评分标准允许额外的表达分，可以添加标题，例如“过滤装置图”。
6. Tackling Calculation and Data-Handling Questions | 攻克计算与数据处理题
Calculation questions in Year 7 Chemistry usually involve temperature changes, solubility in grams per 100 g of water, or simple ratios from results tables. The marking scheme requires you to show all working out step by step, even if you can do the calculation in your head. If the final answer is wrong but your method is correct, you can still earn most of the marks. Write the formula, substitute the numbers, and give the answer with the correct unit.
7 年级化学的计算题通常涉及温度变化、溶解度（克/100 克水）或结果表格中出现的简单比例。评分标准要求你逐步展示所有运算过程，即使你能心算出来。如果最终答案错了，但方法是正确的，你仍然可以获得大部分分数。写出公式，代入数字，并给出带有正确单位的答案。
For example, a question might give the mass of salt dissolving at different temperatures and ask: ‘What mass of salt dissolves in 50 g of water at 30°C if the solubility is 36 g/100 g water?’ Show the ratio: (36 g / 100 g water) = (x / 50 g water). Then cross-multiply: x = 36 × 50 / 100 = 18 g. Clearly state your answer as ’18 g of salt’. If you just write ’18’ without the unit, the mark scheme may not award the final accuracy mark. Units are just as important as the number.
例如，一道题可能给出不同温度下溶解盐的质量，然后问：“如果溶解度为 36 克/100 克水，在 30°C 时，50 克水中能溶解多少克盐？”展示出比例关系：(36 g / 100 g water) = (x / 50 g water)。然后交叉相乘：x = 36 × 50 / 100 = 18 g。明确写出答案“18 克盐”。如果你只写“18”而没有单位，评分标准可能不会给最后的精确度分。单位和数字同等重要。
When handling data from tables, always check the headings for units. CCEA examiners expect you to read values exactly, and when drawing a bar chart or line graph, use the exact spacing and scales on the provided grid. For graphs, label axes including units (e.g., ‘Temperature (°C)’), plot points carefully with small crosses, and draw a smooth line or curve. Mark schemes often award a mark for correct plotting, a mark for scale and labels, and a mark for the line itself.
处理表格中的数据时，务必检查表头中的单位。CCEA 考官期望你能精确读取数值；在画条形图或折线图时，使用所提供的网格上的精确间距和刻度。对于图表，给坐标轴添加包含单位的标签（例如“温度 (°C)”），仔细用小叉号标出数据点，并画出平滑的线条或曲线。评分标准通常会为正确描点给一分，为刻度和标签给一分，为线条本身给一分。
7. Using Correct Scientific Vocabulary | 使用正确的科学词汇
One of the easiest ways to boost marks in CCEA Chemistry is to replace everyday words with precise scientific terms. The mark scheme specifically lists acceptable vocabulary, and using the right term shows the examiner you understand the concept at the expected level. For example, say ‘dissolve’ instead of ‘disappear’, ‘insoluble’ instead of ‘won’t mix’, and ‘filtrate’ instead of ‘the water that comes through’. These substitutions create instant mark scheme matches.
在 CCEA 化学中提分的最简单方法之一就是用精确的科学术语替代日常用语。评分标准明确列出了可接受的词汇，使用正确的术语能让考官看出你达到了预期的理解水平。例如，说“dissolve”（溶解）而不是“disappear”（消失），说“insoluble”（不溶的）而不是“won’t mix”（不相溶），说“filtrate”（滤液）而不是“the water that comes through”（流出来的水）。这些替换能立即匹配评分标准。
Develop a habit of using the particle model vocabulary: atoms, molecules, particles, energy, forces, attraction, vibrate, move, spread. For separation techniques: soluble, insoluble, solvent, solute, solution, concentrated, dilute, residue, filtrate, distillate, condenser. For reactions: reactant, product, irreversible, reversible, exothermic (gives out heat), endothermic (takes in heat). Keep a glossary of these terms as you learn each topic and practise writing sentences that include them naturally.
养成使用粒子模型词汇的习惯：原子、分子、粒子、能量、力、吸引力、振动、移动、扩散。对于分离技术：可溶的、不溶的、溶剂、溶质、溶液、浓缩的、稀释的、残渣、滤液、馏出液、冷凝器。对于反应：反应物、生成物、不可逆的、可逆的、放热的（释放热量）、吸热的（吸收热量）。在学习每个主题时，建立这些术语的词汇表，并练习写出自然包含它们的句子。
Misusing vocabulary can cost marks. For instance, calling a mixture a compound is a serious error because it shows a misunderstanding of chemical bonding. In CCEA mark schemes, if you state that water is a mixture, you lose the mark, and the examiner notes a fundamental weakness. Always check: a pure substance has a fixed melting point and a fixed boiling point, whereas a mixture melts or boils over a range of temperatures. Use this distinction in your answers whenever purity is discussed.
误用词汇会失分。例如，将混合物称为化合物是一个严重错误，因为这表明你对化学键的理解有误。在 CCEA 评分标准中，如果你说水是一种混合物，你会丢掉分数，考官也会注意到一个基本弱点。始终要检查：纯物质具有固定的熔点和固定的沸点，而混合物的熔化和沸腾是在一个温度范围内进行的。在任何涉及纯度的讨论中，都要在答案中使用这个区分。
8. Structuring Longer Answers: Paragraphs and Bullet Points | 组织长答案：段落和要点符号
When a question carries 4 or more marks, your answer needs a clear structure to make sure you cover all the required points. A paragraph with a topic sentence, followed by supporting details, works well for explanation questions. For description or list-style questions, bullet points are acceptable in CCEA mark schemes and can help you present information tidily. However, always write in full sentences unless the question explicitly asks for a list.
当一道题值 4 分或更多时，你的答案需要有清晰的结构，以确保覆盖所有要求的得分点。对于解释题，一个带有主题句、后面跟着支持细节的段落效果很好。对于描述或列举式问题，CCEA 评分标准允许使用要点符号，这有助于整洁地呈现信息。不过，除非题目明确要求列出，否则始终要用完整的句子写作。
For a question like ‘Describe the changes of state that occur during distillation to separate salt from seawater’, you could structure your answer as: ‘First, the seawater is heated. Water evaporates from the solution, turning from liquid to gas, while the dissolved salt stays behind. Next, the water vapour rises and enters the condenser, where it cools and condenses back into liquid water (distillate). The salt remains in the flask as residue.’ This linear sequence mirrors the flow of the experiment and hits the marking points one by one.
对于像“描述用蒸馏法从海水中分离盐时所发生的状态变化”这样的问题，你可以将答案组织为：“首先，将海水加热。水从溶液中蒸发，从液态变为气态，而溶解的盐留在原处。接着，水蒸气上升并进入冷凝器，在那里冷却并冷凝回液态水（馏出液）。盐作为残渣留在烧瓶中。”这种线性顺序反映了实验流程，并逐个击中了评分点。
Use connectives like ‘firstly’, ‘then’, ‘finally’, ‘this causes’, ‘as a result’ to guide the examiner through your logical steps. This is especially important in multi-step processes like crystallisation or chromatography. The mark scheme often allocates a mark for sequencing; even if each step is correct, a jumbled order can lose a communication mark. Practise writing timed answers to past paper questions, focusing on ordering your sentences logically with these signpost words.
使用“首先”、“然后”、“最后”、“这导致”、“因此”等连接词，引导考官理解你的逻辑步骤。这在结晶法或色谱法等包含多个步骤的过程中尤为重要。评分标准通常会为顺序安排分配一分；即使每个步骤都正确，混乱的顺序也可能丢掉表达分。练习限时作答往年真题，专注于用这些路标词有逻辑地排列句子。
9. Common Pitfalls and How to Avoid Them | 常见丢分陷阱与避免方法
Even students who understand the chemistry well lose marks by making avoidable mistakes. One major pitfall is ignoring the question focus: answering what you want to say rather than what the question asks. For instance, if a question asks ‘Name a method to separate sand from water’, the answer is ‘filtration’. If you start explaining how filtration works, you might not be penalised but you waste time and gain no extra marks. Shorter, direct answers are best for ‘Name’ and ‘State’ prompts.
即使是化学理解得很好的学生，也会因为犯一些本可避免的错误而失分。一个主要的陷阱是忽略问题焦点：回答你想说的内容，而不是问题所问的。例如，如果题目问“命名一种将沙从水中分离出来的方法”，答案是“过滤”。如果你开始解释过滤的工作原理，你可能不会被扣分，但会浪费时间且得不到额外分数。对于“命名”和“陈述”类提示，简短直接的答案是最好的。
Another common mistake is incomplete comparisons. If asked ‘Compare solids and liquids in terms of particle arrangement’, you must mention both: ‘In solids, particles are closely packed in a regular pattern and vibrate in fixed positions. In liquids, particles are still close but are arranged irregularly and can slide past each other.’ Many students describe solids fully but forget to match the same features for liquids, losing the comparison mark. Using a table or ‘whereas’ structure helps balance the two sides.
另一个常见错误是不完整的比较。如果问“从粒子排列的角度比较固体和液体”，你必须两者都提到：“在固体中，粒子紧密排列成规则图案，并在固定位置振动。在液体中，粒子仍然紧密但排列不规则，可以相互滑动。”许多学生详细描述了固体，但忘记对液体匹配相同特征，从而丢掉了比较分。使用表格或“whereas”结构有助于平衡两个方面。
Misreading scales or units is a frequent error in graph and table questions. Always check whether the axis starts at zero, and read intervals carefully. For example, a temperature scale may go up in increments of 5°C; mistaking a grid line for 10°C can throw off all your data interpretation. Circle the units on the question paper as a reminder. When measuring, use the value exactly as shown or interpolate carefully, and double-check your answer to avoid transcription errors.
读错刻度或单位是图表和表格题中常见的错误。始终检查坐标轴是否从零开始，并仔细阅读间隔。例如，温度刻度可能以 5°C 为增量递增；误将网格线当作 10°C 会打乱你所有的数据解读。在试卷上将单位圈出来作为提醒。测量时，按照所示精确取值或仔细内插，并复核答案以避免誊写错误。
Finally, omitting safety or practical details when an experiment is described can cost marks. CCEA mark schemes often include a point for safety precautions or proper use of equipment. For instance, when heating a test tube, mention pointing the mouth away from people, wearing safety goggles, and heating gently while moving the tube. Even if the question does not explicitly ask ‘how would you do it safely?’, weaving in a safety note when describing a procedure can capture these hidden marks.
最后，描述实验时忽略安全或操作细节也会失分。CCEA 评分标准通常会为一个安全预防措施或正确使用设备的点留出分数。例如，加热试管时，要提到将管口远离人群、佩戴护目镜并缓慢移动并加热试管。即使题目没有明确问“如何安全操作？”，在描述步骤时加入一句安全提示也能抓住这些隐藏分。
10. Exam-Day Strategies and Time Management | 考试策略与时间管理
On the day of the exam, a calm and strategic approach can make a huge difference. Read through the entire paper during the first minute to get a sense of the question types and the marks available. Allocate time roughly according to marks: a 1-mark question deserves about 1 minute, while a 6-mark extended writing question might need 7–8 minutes including planning. Stick to this plan to avoid running out of time on high-mark questions.
考试当天，冷静且有策略的答题方式可以带来巨大差别。在最初的一分钟里浏览整张试卷，了解题型和分值。根据分数粗略分配时间：一道 1 分的题目大约需要 1 分钟，而一道 6 分的扩展写作题可能需要 7–8 分钟（含计划时间）。坚持这个计划，以免在高分题上时间不够。
Always answer the questions you find easiest first. This builds confidence and guarantees you bank the marks you are most sure of. Leave the trickier explanation or calculation questions for later, but remember to mark them with a star so you do not miss them. If you get stuck, move on and come back; a fresh look often helps you spot a forgotten fact.
始终优先回答你觉得最容易的题目。这能建立信心，并保证你拿到最有把握的分数。把较难的说明或计算题留到后面，但要记得用星号标记它们，以免遗漏。如果卡住了，先跳过去再回来；重新审视往往能帮你想起遗忘的知识点。
For the final 5 minutes, stop writing new answers and review what you have written. Check that you have used correct units on all numerical answers, that diagram labels are horizontal and legible, and that you have not left any multiple-choice or single-word answer blank. In CCEA Chemistry, a blank always scores zero, while an educated guess might gain a mark. Read through your explanations to see if you have included cause-and-effect language, as this frequently adds a missing mark.
在最后 5 分钟里，不要再写新的答案，而是要检查已写的内容。检查所有数值答案是否都带上了正确单位，图表标签是否水平且清晰可读，以及是否留下任何选择题或单词填空题的空白。在 CCEA 化学中，空白一定得零分，而基于知识的猜测可能会得分。通读你的解释题，看看是否包含了因果关系的语言，这常常能找回丢掉的一分。
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