📚 Year 7 AQA Economics: Mock Exam Breakdown | Year 7 AQA 经济：单元测试模拟卷解析
This breakdown walks through a typical Year 7 AQA Economics end‑of‑unit mock paper, explaining the reasoning behind each answer. By the end, you will see how key ideas such as scarcity, opportunity cost, factors of production, and the basic market mechanism are tested — and how to tackle them confidently.
这份解析将带你回顾一份典型的 Year 7 AQA 经济单元测试模拟卷，逐一讲解每道题的答题思路。学完之后，你会清楚稀缺性、机会成本、生产要素、基本市场机制等核心概念在考试中如何呈现，并学会从容应对。
1. Multiple‑choice: What is Economics? | 选择题：经济学是什么？
The first question on the mock usually asks: 'Economics is best defined as the study of...' The correct option is 'how people make choices under scarcity.' Economics begins with the idea that we have unlimited wants but limited resources, so every decision involves a trade‑off.
模拟卷的第一题往往这样问：“经济学最准确的定义是研究……”正确选项是“人们在稀缺条件下如何做出选择”。经济学的起点是我们无穷的欲望与有限的资源之间的矛盾，因此每个决定都意味着取舍。
The distractors often include 'how to make money' or 'how businesses run.' While those are part of economics, they are not the core definition. For Year 7, always link the subject back to scarcity and choice.
干扰项常包含“如何赚钱”或“企业如何运营”。虽然这些属于经济学范畴，但不是核心定义。在 Year 7 阶段，一定要把经济学和稀缺性、选择联系在一起。
2. Scarcity vs. Shortage | 稀缺性与短缺的区别
A common trap is confusing scarcity with a temporary shortage. Scarcity is permanent and universal — there will never be enough resources to satisfy all wants. A shortage is a short‑term situation where supply falls below demand at a given price.
常见易错点是混淆稀缺性和暂时性短缺。稀缺是永恒且普遍存在的——资源永远无法满足所有的欲望。短缺则是短期现象，指在某个价格下供给低于需求。
In the mock, a question might show a picture of empty supermarket shelves after a storm. The correct answer would identify it as a shortage, not scarcity, because it is temporary and can be fixed. Scarcity cannot be eliminated.
模拟卷中可能会出现暴风雨后超市货架空空如也的图片。正确答案应是短缺，而非稀缺，因为这是暂时的、可以解决的。稀缺是永远无法消除的。
3. Opportunity Cost Calculation | 机会成本计算
Opportunity cost is the next best alternative forgone. A typical question presents a student who has £10 and must choose between a cinema ticket (£10) and a football (£10). The opportunity cost of buying the cinema ticket is the football.
机会成本是被放弃的次优选择。一道典型题目是：一个学生有 10 英镑，必须在下述两者中选择：一张电影票（10 英镑）或一个足球（10 英镑）。购买电影票的机会成本就是那个足球。
Be careful when money is left over. If the cinema ticket costs £8 and the football £10, the opportunity cost of the cinema ticket is still the football, because the £2 saved cannot buy the football — the choice is between the two items, not the money.
如果存在找零，要格外小心。若电影票 8 英镑，足球 10 英镑，购买电影票的机会成本仍是足球，因为省下的 2 英镑买不到足球——机会成本比较的是两个选项，而非剩余的钱。
4. Factors of Production: Land, Labour, Capital, Enterprise | 生产要素：土地、劳动、资本、企业才能
The mock always includes a matching exercise. 'Land' includes all natural resources — oil, forests, fish in the sea. 'Labour' is human effort. 'Capital' refers to man‑made tools and machinery used to produce other goods. 'Enterprise' is the risk‑taking ability that brings the other three together.
模拟卷中一定有一道配对题。“土地”涵盖所有自然资源——石油、森林、海洋鱼类。“劳动”是人的努力。“资本”指用于生产其他商品的人造工具和机器。“企业才能”则是将前三者组合起来的冒险精神和组织能力。
A common mistake is classifying money as capital. In Year 7 economics, money itself is not a factor of production; it is simply a medium of exchange. Physical capital (a tractor, a sewing machine) is what counts.
常见错误是把金钱归为资本。在 Year 7 经济学中，货币本身不是生产要素，它只是交换媒介。实物资本（拖拉机、缝纫机）才是真正的资本。
5. The Basic Economic Problem Diagram | 基本经济问题图解
Many students lose marks on the diagram question: 'Illustrate the basic economic problem using a wants‑vs‑resources framework.' A simple sketch showing unlimited wants (an arrow pointing to infinity) and limited resources (a finite box) is enough. Label both sides clearly.
许多学生在一道图表题上失分：“用欲望-资源框架说明基本经济问题。”只需画一个简单示意图：无限欲望（指向无穷的箭头）和有限资源（一个固定大小的方框）。两侧都要清晰标注。
The diagram is rarely about artistic skill; it is about showing that unlimited wants crash into limited resources. You can even draw a see‑saw that can never balance. The key is the written explanation that follows: 'Because resources are limited, we must make choices.'
这道题不考绘画能力，而是展示无限欲望与有限资源的碰撞。你甚至可以画一个永远无法平衡的跷跷板。关键在于后面的文字说明：“因为资源有限，我们必须做出选择。”
6. Supply and Demand: The Market Price | 供给与需求：市场价格
In Year 7, supply and demand are introduced through simple schedules. A question might give a table of prices and quantities demanded and supplied, then ask for the equilibrium price. The equilibrium is where quantity demanded equals quantity supplied.
在 Year 7 阶段，供给和需求通过简单的表格引入。题目可能给出一组价格、需求量与供给量的数据，要求找出均衡价格。均衡点即需求量等于供给量的那个价格。
| Price (p) | Qd | Qs |
|---|---|---|
| 50 | 100 | 20 |
| 60 | 80 | 40 |
| 70 | 60 | 60 |
| 80 | 40 | 80 |
Here the equilibrium price is 70p because at 70p both Qd and Qs are 60 units. If the price is set at 50p, there is excess demand (shortage); at 80p, excess supply (surplus).
上表中，均衡价格是 70 便士，因为在 70p 时需求量与供给量均为 60 单位。若价格定在 50p，会出现超额需求（短缺）；在 80p，则出现超额供给（过剩）。
7. Shifts in Demand: Advertising and Tastes | 需求变动：广告与偏好
A common short‑answer question reads: 'A famous singer wears a new brand of trainers. What happens to the demand curve for that brand?' The demand curve shifts to the right because consumer tastes and preferences have changed positively.
一道常见简答题是：“一位著名歌手穿上新品牌的运动鞋。该品牌的需求曲线会怎样变化？”需求曲线将向右平移，因为消费者的品味和偏好发生了积极变化。
Students must distinguish between a 'movement along' the demand curve (caused by a price change) and a 'shift' of the entire curve (caused by non‑price factors like advertising, income, or population). The singer example is a shift.
学生必须区分“沿需求曲线的移动”（由价格变化引起）和整条曲线的“平移”（由广告、收入、人口等非价格因素导致）。歌手例子属于曲线平移。
8. Specialisation and Division of Labour | 专业化与劳动分工
The mock often asks for one advantage and one disadvantage of specialisation. Advantage: workers become faster and more skilled, raising output per hour. Disadvantage: work can become repetitive and boring, leading to lower motivation.
模拟卷经常要求写出专业化的一个优点和一个缺点。优点：工人变得更熟练、更快，提高每小时产量。缺点：工作可能变得重复枯燥，导致积极性下降。
In Year 7, examples are helpful. Mention a pizza restaurant where one person stretches dough, another adds sauce, another adds toppings. Output per worker rises, but the dough‑stretcher may get tired of the same task all day.
在 Year 7 阶段，举例很管用。比如一家比萨店，一个人擀面饼，另一个人加酱料，还有人加配料。人均产量提高了，但擀面饼的人可能厌倦整天重复同一动作。
9. Public vs. Private Goods (Brief Introduction) | 公共品与私人品（简单介绍）
Though not examined in depth at Year 7, a simple classification question may appear. A private good is rival and excludable (a chocolate bar). A public good is non‑rival and non‑excludable (street lighting). The mock may provide a list and ask which is which.
尽管 Year 7 不作深入考查，但可能会出现一道简单的分类题。私人品具有竞争性和排他性（如巧克力棒）。公共品具有非竞争性和非排他性（如路灯）。模拟卷可能列出一组物品，要求归类。
Key tip: if one person's consumption prevents another from using the same unit, it is rival. If you can stop someone from using it (by charging a price), it is excludable. Street lighting does not reduce when someone walks under it, and you cannot easily stop people from benefiting.
关键提示：如果一个人消费时妨碍他人使用同一单位物品，就是竞争性。如果你能通过收费阻止他人使用，就是排他性。路灯不会因有人经过而变暗，你也很难阻止路人从中受益。
10. The Role of Money | 货币的职能
Money serves as a medium of exchange, a store of value, and a unit of account. The mock might ask: 'Without money, what system would we use?' The answer is barter, which requires a double coincidence of wants — both people must want what the other has at the same time.
货币充当交换媒介、价值贮藏和计价单位。模拟卷可能问：“如果没有货币，我们会使用什么系统？”答案是物物交换，它要求“欲望的双重巧合”——双方必须同时想要对方的东西。
Explain why barter is inefficient: a farmer who wants shoes must find a shoemaker who wants wheat, at that exact moment. Money solves this problem.
解释物物交换为何低效：一个想用小麦换鞋的农民，必须找到一个恰好需要小麦的鞋匠。货币解决了这个难题。
11. Production Possibility Frontier (PPF) Basics | 生产可能性边界基础
The PPF shows the maximum combinations of two goods an economy can produce with given resources. Points inside the curve represent inefficiency; points on the curve are efficient; points outside are currently unattainable.
生产可能性边界表示一个经济体在给定资源下能生产的两种商品的最大组合。曲线内部的点代表低效率；曲线上的点是有效率的；曲线外的点目前无法达到。
In the mock, a simple straight‑line PPF with two goods (e.g. books and pens) is given. Students must state the opportunity cost of moving from one point to another. For instance, moving from 10 books and 0 pens to 8 books and 4 pens means the opportunity cost of 4 pens is 2 books, so 1 pen costs 0.5 books.
模拟卷中会给出一条简单的直线型 PPF，比如书本和钢笔。学生需要说出从一点移动到另一点的机会成本。例如从 10 本书、0 支钢笔移动到 8 本书、4 支钢笔，意味着 4 支钢笔的机会成本是 2 本书，所以 1 支钢笔的机会成本是 0.5 本书。
12. Revision Tips and Common Pitfalls | 复习技巧与常见陷阱
Many Year 7 students lose marks by not reading the command word: 'explain' requires a reason, not just a one‑word answer. Use 'because' to show cause and effect. Also, keep definitions precise — 'scarcity' is not 'not enough money,' it is the gap between unlimited wants and limited resources.
许多 Year 7 学生因为没有看清指令词而失分：“解释”要求给出原因，而不是只回答一个词。用“因为”来展示因果关系。定义也要精确——“稀缺性”不是“钱不够用”，而是无限欲望与有限资源之间的差距。
Time management is key. The mock has multiple‑choice, short‑answer, and one longer question. Allocate roughly 1 minute per mark. For a 6‑mark question, spend about 6 minutes and write a clear paragraph with examples.
时间管理至关重要。模拟卷包括选择题、简答题和一道较长的题目。大致按每题 1 分钟分配。对于 6 分的题目，花 6 分钟左右，写一段清晰的文字并附上例子。
Finally, revisit the core concepts: scarcity, opportunity cost, factors of production, and the basic demand‑and‑supply model. These form the foundation of all later topics.
最后，重温核心概念：稀缺性、机会成本、生产要素以及基本的供需模型。这些是所有后续知识的基础。
Published by TutorHao | Economics Revision Series | aleveler.com
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