📚 Year 7 WJEC Economics: High-Frequency Topics & Common Mistake Analysis | Year 7 WJEC 经济：高频考点与易错题分析
Welcome to your Year 7 WJEC Economics revision guide. This article identifies the topics that appear most often in assessments and highlights the mistakes students make again and again. By understanding both the content and the common pitfalls, you can approach your economics tests with greater confidence.
欢迎来到 Year 7 WJEC 经济复习指南。本文梳理了考试中最常出现的话题，并重点分析了同学们反复出错的典型问题。掌握了这些内容与易错点，你就能更自信地应对经济学科的测验。
1. The Economic Problem: Scarcity and Choice | 基本经济问题：稀缺性与选择
The fundamental economic problem is that resources are limited but human wants are unlimited. Because we cannot have everything we desire, we must make choices about how to use scarce resources.
基本经济问题在于资源是有限的，而人类的欲望却是无限的。正因为我们无法拥有所有想要的东西，就必须对稀缺资源的使用做出选择。
Scarcity forces individuals, businesses and governments to decide what to produce, how to produce it and for whom to produce it. This is illustrated by the production possibility frontier, which shows the maximum combinations of two goods that can be produced with available resources.
稀缺性迫使个人、企业和政府决定生产什么、如何生产以及为谁生产。生产可能性边界可以很好地说明这一点，它展示了在可用资源下能够生产的两种商品的最大组合。
- Common mistake: Confusing scarcity with a shortage. Scarcity is permanent and universal; a shortage is temporary and can be resolved by increasing supply.
- 常见错误： 把稀缺性与短缺混为一谈。稀缺性是永久且普遍的，而短缺是暂时的，可以通过增加供给来解决。
2. Opportunity Cost – The Next Best Alternative | 机会成本——次优选择的价值
Opportunity cost is the value of the next best alternative forgone when a choice is made. Every decision involves an opportunity cost, whether you are spending time, money or any other resource.
机会成本是指做出某个选择时所放弃的次优选项的价值。每一决定都涉及机会成本，无论你投入的是时间、金钱还是其他资源。
For example, if a student uses their Saturday to revise economics instead of playing football, the opportunity cost is the enjoyment and health benefits of playing football. In WJEC questions, you are often asked to calculate or identify opportunity cost from a simple scenario.
例如，如果一个学生利用周六复习经济而不是去踢足球，那么机会成本就是踢足球带来的乐趣和健康收益。在 WJEC 的考题中，经常要求你从简单情境中计算或识别机会成本。
- Common mistake: Listing all alternatives instead of just the next best one. Opportunity cost is always the single highest-valued alternative given up.
- 常见错误： 列出所有被放弃的选项，而不是只写次优选择。机会成本永远只是放弃掉的那个价值最高的单一替代项。
3. Factors of Production – CELL | 生产要素——CELL 分类
Resources used to produce goods and services are called factors of production. The acronym CELL helps you remember them: Capital, Enterprise, Land and Labour.
用于生产商品和服务的资源被称为生产要素。缩略词 CELL 可以帮助记忆：资本、企业家才能、土地和劳动力。
Land includes all natural resources such as oil, water and forests. Labour is the human effort, both physical and mental. Capital refers to man-made goods used in production, like machinery and factories. Enterprise is the ability to combine the other three factors and take risks to start a business.
土地包括所有自然资源，如石油、水和森林。劳动力是人类的体力和脑力付出。资本是指用于生产的人造物品，如机器和厂房。企业家才能则是将其他三种要素组合起来、并承担风险创办企业的能力。
- Common mistake: Classifying money as capital. In economics, money is a medium of exchange, not a factor of production – capital means physical equipment.
- 常见错误： 把货币归为资本。在经济学中，货币是交换媒介，不是生产要素——资本指的是实物设备。
4. Basic Economic Questions | 三大基本经济问题
Every economy must answer three fundamental questions: What to produce? How to produce? For whom to produce? The way a society answers these questions defines its economic system – market, command or mixed.
每个经济体都必须回答三个基本问题：生产什么？如何生产？为谁生产？一个社会回答这些问题的方式决定了它的经济制度——市场经济、计划经济还是混合经济。
In a pure market economy, consumer preferences determine what is produced. In a command economy, the government makes these decisions. Most real-world economies are mixed, combining elements of both market and government intervention.
在纯粹市场经济中，消费者的偏好决定生产什么。在计划经济中，政府做出这些决定。现实世界的大多数经济都是混合经济，融合了市场和政府干预的成分。
- Common mistake: Thinking that the UK is a pure market economy. The WJEC syllabus expects you to know that the UK is a mixed economy with both private sector and public sector provision.
- 常见错误： 认为英国是纯粹的市场经济。WJEC 大纲要求你了解英国是混合经济，同时存在私营部门和公共部门的供给。
5. Introduction to Demand and Supply | 需求与供给入门
Demand is the quantity of a good or service that consumers are willing and able to buy at various prices, over a period of time. Supply is the quantity that producers are willing and able to sell at various prices.
需求是指在一段时间内，消费者在不同价格水平上愿意且能够购买的商品或服务的数量。供给则是生产者在不同价格水平上愿意且能够出售的数量。
The law of demand states that as price falls, quantity demanded increases, assuming other factors stay the same. The law of supply states that as price rises, quantity supplied increases. These relationships are shown through demand and supply curves.
需求定律指出，在其他条件不变的情况下，价格下降时需求量上升。供给定律指出，价格上升时供给量上升。这些关系可以通过需求曲线和供给曲线来表示。
- Common mistake: Using 'demand' when you mean 'quantity demanded'. A change in price causes a movement along the curve (change in quantity demanded), not a shift of the curve.
- 常见错误： 把“需求量”说成“需求”。价格变动只会引起沿曲线的移动（需求量的变动），而不会使曲线本身发生位移。
6. Shifts of the Demand Curve | 需求曲线的移动
The demand curve shifts when factors other than price change. These factors include income, tastes and preferences, the price of substitutes and complements, advertising and the number of buyers. A rightward shift means more is demanded at each price; a leftward shift means less.
当价格以外的因素发生变化时，需求曲线就会移动。这些因素包括收入、品味与偏好、替代品和互补品的价格、广告以及购买者数量。需求曲线向右移动表示在每个价格水平下需求量都更大；向左移动则表示更小。
For instance, if a popular influencer starts promoting a brand of trainers, demand for those trainers shifts to the right. If the price of a substitute like buses falls, demand for train travel may shift left.
例如，如果一位网红开始推广某个运动鞋品牌，该运动鞋的需求曲线就会向右移。如果替代品如公交车的价格下降，火车出行的需求则可能向左移。
- Common mistake: Assuming that a change in price shifts the demand curve. Price changes cause movement along the curve; only non-price determinants shift the curve.
- 常见错误： 以为价格变化会让需求曲线移动。价格变动只引起沿曲线的移动；只有非价格决定因素才会使曲线位移。
7. Price Elasticity of Demand (PED) – Basic Idea | 需求价格弹性 (PED)——基本概念
For Year 7, you do not need to calculate PED, but you should understand the concept: how responsive quantity demanded is to a change in price. Goods can have elastic or inelastic demand.
对于 Year 7，你不需要计算 PED，但应当理解其概念：需求量对价格变化的反应程度。商品可以有弹性需求或非弹性需求。
If a small price change causes a large change in quantity demanded, demand is elastic. If quantity demanded hardly changes when price changes, demand is inelastic. Addictive products, or those with few substitutes, tend to be inelastic.
如果价格小幅变动引起需求量的大幅变动，需求就是有弹性的。如果价格变化时需求量几乎不变，需求缺乏弹性。容易上瘾的商品、或替代品很少的商品往往缺乏弹性。
- Common mistake: Saying that all necessities are inelastic and all luxuries are elastic without considering substitutes. Necessities with many substitutes can have elastic demand.
- 常见错误： 不考虑替代品就断言所有必需品都缺乏弹性、所有奢侈品都有弹性。替代品众多的必需品也可以具有弹性需求。
8. The Role of Markets | 市场的作用
A market is any place or mechanism where buyers and sellers meet to exchange goods and services. Markets can be physical, like a farmers' market, or online, like an e-commerce platform.
市场是指买卖双方聚集以交换商品和服务的任何场所或机制。市场可以是有形的，如农贸市场，也可以是虚拟的，如电子商务平台。
Markets help to allocate scarce resources. Through the price mechanism, rising prices signal producers to supply more, while falling prices signal consumers to buy more. This is how markets help answer the 'what, how and for whom' questions.
市场有助于配置稀缺资源。通过价格机制，上涨的价格向生产者发出增加供给的信号，而下降的价格则鼓励消费者更多购买。市场就是这样帮助回答“生产什么、如何生产、为谁生产”的。
- Common mistake: Thinking that a market must be a physical location. Online auctions and digital marketplaces are also markets.
- 常见错误： 认为市场必须是实体的场所。在线拍卖和数字交易平台同样是市场。
9. Money and Its Functions | 货币及其功能
Money is anything that is generally accepted as payment for goods and services. It has four main functions: medium of exchange, store of value, unit of account, and standard of deferred payment. Without money, we would rely on barter, which requires a double coincidence of wants.
货币是被普遍接受作为商品和服务支付手段的任何东西。它有四个主要功能：交换媒介、价值储藏、计价单位和延期支付标准。没有货币，我们就只能依赖以物易物，而这需要双方需求意愿的契合。
Modern money includes cash and bank deposits. The WJEC exam may ask you to explain why seashells or beads could serve as money in the past, as long as they were widely accepted and durable.
现代货币包括现金和银行存款。WJEC 考试可能会要求你解释为什么贝壳或珠子在过去可以充当货币，只要它们被广泛接受并且耐用。
- Common mistake: Believing that only coins and notes count as money. Bank deposits that can be transferred electronically are also money.
- 常见错误： 认为只有硬币和纸币才算货币。可以电子转账的银行存款同样是货币。
10. Economic Sectors and Specialisation | 经济部门与专业化
The economy is divided into three main sectors: primary (extraction of raw materials), secondary (manufacturing) and tertiary (services). Specialisation occurs when individuals, businesses or countries focus on producing a narrow range of goods or services where they have an advantage.
经济分为三个主要部门：第一产业（原材料开采）、第二产业（制造业）和第三产业（服务业）。专业化是指个人、企业或国家专注于生产自身具有优势的少数商品或服务。
Specialisation increases output because workers become quicker and more skilled at a task. It also allows for the use of machinery. However, it can make work repetitive and boring, and workers may become over-dependent on one industry.
专业化能够提升产量，因为工作者在特定任务上变得更快、更熟练，也便于使用机器。但专业化也可能使工作变得重复枯燥，工人可能过度依赖单一产业。
- Common mistake: Ignoring the disadvantages of specialisation. WJEC mark schemes reward balanced answers that mention both benefits and drawbacks.
- 常见错误： 忽略了专业化的弊端。WJEC 评分标准鼓励学生给出均衡的答案，既提到好处也提到缺点。
11. Common Exam-Style Questions and How to Tackle Them | 常见考题类型与应对技巧
Year 7 WJEC economics papers often include multiple-choice questions, short data-response items and short written answers. Command words like 'state', 'explain' and 'discuss' require different levels of detail.
Year 7 WJEC 经济试卷通常包括选择题、简短的数据分析题和简短的文字回答题。关键词如“指出”、“解释”和“讨论”要求不同的作答详细程度。
When you see 'explain', you must use the idea of cause and effect. For 'discuss', you should give both sides of an argument. Pay close attention to the number of marks allocated – they tell you how many points to make.
看到“解释”时，你必须运用因果逻辑。看到“讨论”时，你应当给出正反两方的论点。要特别注意题后的分值——它能提示你需要写出多少要点。
- Common mistake: Writing too much for a one-mark question and too little for a six-mark question. Budget your time according to marks available.
- 常见错误： 对一分的题目写得太多，对六分的题目却写得过少。要根据分值合理分配答题时间。
12. Revision Tips for Year 7 Economics | Year 7 经济学复习建议
Build your revision around key terms. Economics has its own language – scarcity, opportunity cost, factors of production, demand, supply, elasticity. Create flashcards with the term on one side and a clear definition plus an example on the other.
围绕关键术语进行复习。经济学有自己的一套语言——稀缺性、机会成本、生产要素、需求、供给、弹性。制作学习卡片，正面写术语，背面写清晰的定义和实例。
Practise past paper questions under timed conditions. This helps you get used to the command words and the pace of the exam. After attempting a question, check the mark scheme to see exactly what examiners are looking for.
在计时条件下练习往年试题。这有助于你熟悉指令词和考试节奏。做完一道题后，对照评分标准，弄清楚考官到底想要什么答案。
Finally, relate economics to real life. When you see a news story about rising fuel prices or a new product launch, think about the economic concepts at play. This will make your understanding deeper and easier to recall in the exam room.
最后，把经济学和现实生活联系起来。当你在新闻中看到燃油价格上涨或新产品发布时，想一想背后的经济学概念。这能让你的理解更深入，在考场上也更容易回忆起来。
Published by TutorHao | Economics Revision Series | aleveler.com
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