📚 Year 7 OCR Economics: Unit Test Mock Paper Walkthrough | 七年级OCR经济：单元测试模拟卷解析
Welcome to this interactive walkthrough of a Year 7 OCR Economics mock test. This practice paper is designed to reinforce your understanding of the fundamental economic concepts introduced in your first unit. We will cover scarcity, choice, demand and supply, market equilibrium, money, factors of production, economic sectors, and simple budgeting. Each question will be presented, followed by a clear explanation of the correct answer. Use this resource to identify your strengths and areas for improvement before your real assessment.
欢迎来到这份七年级OCR经济模拟卷的互动解析。这份练习卷旨在巩固你对第一单元所介绍的基本经济概念的理解。我们将涵盖稀缺性、选择、需求与供给、市场均衡、货币、生产要素、经济部门以及简单的预算。每个问题都会呈现，然后附上正确答案的清晰解释。请利用这份资源在真正的测评前找出你的优势与需要提升的领域。
1. Mock Test Overview | 模拟测试概览
This mock unit test contains ten questions covering the core topics from the first unit of the Year 7 OCR Economics syllabus. The questions begin with multiple-choice items on fundamental definitions, then move to a short-answer item, a gap-fill, a sector identification question, a diagram-based scenario, and a short essay. The total marks are 20. You should spend about 30 minutes on this test under timed conditions to simulate the real experience.
这份模拟单元测试包含十道题，覆盖了七年级OCR经济教学大纲第一单元的核心主题。题目从基础定义的选择题开始，然后过渡到简答题、填空题、部门识别题、基于图表的场景题和一篇小短文。总分为20分。建议你在计时条件下花大约30分钟完成这份测试，以模拟真实考试体验。
2. Question 1: The Basic Economic Problem | 问题1：基本经济问题
The question asks: ‘The condition where our unlimited wants exceed the limited resources available is called: A) Choice B) Scarcity C) Demand D) Supply’. The correct choice is B – Scarcity. Scarcity is the fundamental economic problem that forces individuals, businesses, and governments to make choices because there are not enough goods and services to satisfy everyone’s desires.
题目问：“我们的无限欲望超过有限的可用资源，这种状况被称为：A) 选择 B) 稀缺性 C) 需求 D) 供给”。正确选项是B——稀缺性。稀缺性是基本经济问题，它迫使个人、企业和政府做出选择，因为没有足够的商品和服务来满足所有人的欲望。
3. Question 2: Choice and Opportunity Cost | 问题2：选择与机会成本
This multiple-choice question asks: ‘The value of the next best alternative given up when a choice is made is called: A) Price B) Cost C) Opportunity cost D) Budget’. The answer is C – Opportunity cost. Whenever you make a decision, you face a trade-off. Opportunity cost is not simply the money spent; it represents the benefit you could have gained from the next best option you sacrificed.
这道选择题问：“当做出选择时，所放弃的次优替代品的价值被称为：A) 价格 B) 成本 C) 机会成本 D) 预算”。答案是C——机会成本。每当你做出决定，都面临取舍。机会成本不仅仅是你花掉的钱；它代表你本可以从被你牺牲的次优选项中获得的收益。
4. Question 3: The Law of Demand | 问题3：需求定律
The problem reads: ‘According to the law of demand, when the price of a good increases, what happens to the quantity demanded, ceteris paribus? A) Increases B) Decreases C) Stays the same D) Becomes zero’. The correct answer is B – Decreases. The law of demand states there is an inverse relationship between price and quantity demanded, assuming other factors remain constant. If a chocolate bar becomes more expensive, consumers will generally buy fewer of them.
题目是：“根据需求定律，当商品价格上升时，需求量会发生什么变化（其他条件不变）？A) 增加 B) 减少 C) 保持不变 D) 变为零”。正确答案是B——减少。需求定律表明，在其他因素不变的情况下，价格与需求量之间存在反向关系。如果一块巧克力棒变贵了，消费者通常会少买一些。
5. Question 4: The Law of Supply | 问题4：供给定律
This question tests: ‘According to the law of supply, when the price of a good increases, what happens to the quantity supplied? A) Decreases B) Stays the same C) Increases D) No relation’. The answer is C – Increases. The law of supply says that producers are willing to offer more of a good at higher prices because selling at a higher price can increase revenue and profit.
这道题考查：“根据供给定律，当商品价格上升时，供给量会发生什么变化？A) 减少 B) 保持不变 C) 增加 D) 无关”。答案是C——增加。供给定律指出，生产者在价格更高时愿意提供更多的商品，因为以更高的价格销售可以增加收入和利润。
6. Question 5: Market Equilibrium | 问题5：市场均衡
The question states: ‘At the equilibrium price, the quantity demanded is: A) Greater than quantity supplied B) Less than quantity supplied C) Equal to quantity supplied D) Zero’. The correct choice is C – Equal to quantity supplied. The equilibrium price is the price at which the plans of consumers and producers match exactly. There is no pressure for the price to change because supply exactly meets demand.
题目指出：“在均衡价格下，需求量：A) 大于供给量 B) 小于供给量 C) 等于供给量 D) 为零”。正确选项是C——等于供给量。均衡价格是消费者和生产者计划恰好匹配时的价格。此时没有价格变动的压力，因为供给恰好满足需求。
7. Question 6: Functions of Money | 问题6：货币的功能
This short-answer question asks: ‘Name one function of money and provide an example.’ A model answer: One key function of money is to serve as a medium of exchange. For example, you can use pounds sterling to buy a book without needing to barter. Another acceptable answer is ‘store of value’ or ‘unit of account’. Ensure you explain briefly: as a store of value, money can be saved and used later, holding its purchasing power over time.
这道简答题问：“说出货币的一个功能并举例。”一份范例回答：货币的一个关键功能是作为交换媒介。例如，你可以用英镑购买一本书，而不需要进行物物交换。其他可行的答案包括“价值储存”或“记账单位”。确保简要解释：作为价值储存，货币可以被存起来以后再用，在一段时间内保持其购买力。
8. Question 7: Factors of Production | 问题7：生产要素
The gap-fill sentence is: ‘The four factors of production are land, labour, capital and ________.’ The missing word is enterprise (or entrepreneurship). Enterprise refers to the ability of entrepreneurs to organise the other three factors, take risks, and innovate. An example is a person starting a bakery using flour (land), workers (labour), and ovens (capital), along with their own business idea (enterprise).
填空题是：“四种生产要素是土地、劳动、资本和________。”缺的词是企业（或企业家才能）。企业指的是企业家将其他三种要素组织起来、承担风险并进行创新的能力。例如，一个人开一家面包店，使用面粉（土地）、工人（劳动）和烤炉（资本），再加上自己的商业创意（企业）。
9. Question 8: Economic Sectors | 问题8：经济部门
The question asks: ‘Which sector of the economy extracts raw materials? Primary, Secondary or Tertiary?’ The correct answer is the Primary sector. This sector involves industries like farming, fishing, mining, and forestry, where natural resources are obtained directly from the earth or sea. The secondary sector manufactures goods, and the tertiary sector provides services.
题目问：“经济的哪个部门负责开采原材料？第一产业、第二产业还是第三产业？”正确答案是第一产业。这个部门包括农业、渔业、采矿业和林业等，直接从土地或海洋获取自然资源。第二产业制造商品，第三产业提供服务。
10. Question 9: Disequilibrium and Shortages | 问题9：非均衡与短缺
This scenario presents a demand and supply graph. The instruction says: ‘If the market price is set below the equilibrium price, the market will experience a _______ (surplus/shortage).’ The answer is shortage. At a price below equilibrium, the quantity demanded exceeds the quantity supplied, creating excess demand. Sellers may start raising prices because too many buyers chase too few goods.
这个场景给出了一张供需图。提示说：“如果市场价格设定在均衡价格之下，市场将经历_______（过剩/短缺）。”答案是短缺。在低于均衡价格的价格水平下，需求量超过供给量，造成超额需求。卖家可能会开始提高价格，因为太多买家追逐太少的商品。
11. Question 10: Budgeting and Economic Decision-Making | 问题10：预算与经济决策
The final short-essay question is: ‘A student has a weekly allowance of £10. They want to buy a video game for £8 and go to the cinema for £5. Explain the economic problem they face and suggest a rational decision.’ The student faces scarcity – their income is limited while wants are unlimited. The total cost of both items (£13) exceeds the £10 budget. The opportunity cost of buying the game is giving up the cinema trip. A rational decision would be to choose the option that provides the greatest satisfaction. For example, the student might buy the game and forgo the cinema, or they could save for another week to afford both. You must state your choice and the opportunity cost clearly.
最后一道小问答题是：“一名学生每周有10英镑零花钱。他们想花8英镑买一款电子游戏，再花5英镑去电影院。解释他们面临的经济问题，并建议一个理性的决策。”这名学生面临稀缺性——他们的收入有限，而欲望是无限的。两样东西的总成本（13英镑）超过了10英镑的预算。购买游戏的机会成本是放弃去电影院。一个理性的决策是选择能带来最大满足感的选项。例如，学生可以买下游戏而放弃电影，或者再存一周钱以便两者都买。你必须清楚地说明你的选择及其机会成本。
12. Final Tips for Your Revision | 期末复习小贴士
Review the definitions of scarcity, opportunity cost, demand, supply, and equilibrium regularly. Draw diagrams to see how price changes create shortages or surpluses. Practise short-answer questions by explaining real-life examples: what is the opportunity cost of spending time on social media versus studying? Remember that economics is about choices, and every choice has a cost. Good luck with your test!
定期复习稀缺性、机会成本、需求、供给和均衡的定义。画图观察价格变化如何造成短缺或过剩。通过解释生活中的例子来练习简答题：把时间花在社交媒体上而不是学习上的机会成本是什么？记住，经济学关乎选择，而每个选择都有成本。祝你考试顺利！
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