Year 9 CCEA Economics: Unit Test Mock Paper Walkthrough | CCEA 九年级经济单元测试模拟卷解析

📚 Year 9 CCEA Economics: Unit Test Mock Paper Walkthrough | CCEA 九年级经济单元测试模拟卷解析

This walkthrough dissects a full mock unit test for Year 9 CCEA Economics. Every question is broken down step by step, with model answers and examiner-style commentary to reinforce the key skills needed for success. 本文逐题解析一套 CCEA 九年级经济单元模拟试卷，配有标准答案和考官式点评，帮助巩固取得高分所需的核心技能。

Use this resource to check your understanding of scarcity, opportunity cost, supply and demand, market equilibrium, specialisation, money and more. 利用这份材料检查你对稀缺性、机会成本、供需、市场均衡、专业化分工、货币等知识点的掌握情况。

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1. Scarcity: The Heart of Economics | 稀缺性：经济学的核心

Question 1 (2 marks): State the basic economic problem and explain why it forces all economies to make choices.

问题1 (2分)：说出基本经济问题，并解释为何它迫使所有经济体做出选择。

The basic economic problem is scarcity — the condition where limited resources cannot satisfy all of society’s unlimited wants. 基本经济问题是稀缺性——有限资源无法满足社会上无限的欲望。

Because resources such as land, labour and capital are finite, every economy must decide what to produce, how to produce and for whom to produce. 由于土地、劳动力和资本等资源是有限的，每个经济体都必须决定生产什么、如何生产和为谁生产。

Scarcity means that choosing one option always involves giving up another; this introduces the concept of opportunity cost. 稀缺性意味着选择一种方案总是要放弃另一种，这就引出了机会成本的概念。

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2. Opportunity Cost in Daily Decisions | 日常决策中的机会成本

Question 2 (3 marks): Sarah has £15. She can either buy a cinema ticket for £12 or a new book for £15. If she buys the book, calculate her opportunity cost and explain your answer.

问题2 (3分)：莎拉有15英镑。她可以花12英镑买一张电影票，或者花15英镑买一本新书。如果她买了书，请计算其机会成本并解释你的答案。

Opportunity cost is the value of the next best alternative forgone. 机会成本是被放弃的次优选择的价值。

If Sarah buys the book, she sacrifices the cinema ticket — the next best alternative. 如果莎拉买了书，她就放弃了电影票——这是次优选择。

Opportunity Cost = Cinema ticket forgone = £12

机会成本 = 放弃的电影票 = 12 英镑

The £15 spent on the book is the monetary cost, but the opportunity cost is the enjoyment and experience of the cinema she gives up. 花在书上的15英镑是货币成本，但机会成本是她放弃的电影带来的享受和体验。

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3. The Law of Demand | 需求定律

Question 3 (4 marks): State the law of demand and identify two factors that can shift the demand curve for smartphones to the right.

问题3 (4分)：说出需求定律，并指出两个能使智能手机需求曲线向右移动的因素。

The law of demand states that, ceteris paribus, as the price of a good rises, the quantity demanded falls, and as price falls, quantity demanded rises. 需求定律指出，在其他条件不变的情况下，商品价格上升，需求量下降；价格下降，需求量上升。

This inverse relationship is driven by the income effect and the substitution effect. 这种反向关系由收入效应和替代效应驱动。

A rightward shift of the demand curve means more is demanded at every price. Two possible causes are an increase in consumer income and a rise in the price of a substitute good, such as tablets. 需求曲线右移意味着在每个价格水平下需求量都增加了。两个可能的原因：消费者收入增加，以及替代品（如平板电脑）价格上涨。

Other factors include changes in tastes, successful advertising and population growth. 其他因素包括偏好变化、成功的广告宣传和人口增长。

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4. Supply and the Impact of Technology | 供给与技术的影响

Question 4 (3 marks): Explain how an improvement in technology affects the supply of furniture. Use a diagram in words if necessary.

问题4 (3分)：解释技术进步如何影响家具的供给。必要时用文字描述图示。

An improvement in technology lowers production costs, allowing firms to produce more output with the same inputs. 技术进步降低了生产成本，使企业能用相同的投入生产更多产出。

This causes the supply curve to shift to the right — at every price, a larger quantity is supplied. 这导致供给曲线向右移动——在每个价格水平上，供给量都更大。

For example, automated cutting machines in a furniture factory reduce waste and speed up assembly, shifting the market supply for chairs from S1 to S2. 例如，家具厂的自动切割机减少了浪费并加快了组装速度，使椅子的市场供给从 S1 移至 S2。

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5. Finding Market Equilibrium | 寻找市场均衡

Question 5 (5 marks): Study the demand and supply schedule for notebooks and determine the equilibrium price and quantity. Explain what would happen if the price were set at £5.

问题5 (5分)：研究笔记本的需求与供给表，确定均衡价格和数量。解释如果价格设定在5英镑会发生什么。

Price (£)	Quantity demanded	Quantity supplied
1	50	10
2	40	20
3	30	30
4	20	40
5	10	50

Equilibrium occurs where quantity demanded equals quantity supplied. From the table, at £3 both quantities are 30 units. 均衡发生在需求量等于供给量之处。从表中可知，价格为3英镑时两者均为30单位。

Equilibrium price = £3, Equilibrium quantity = 30 units

均衡价格 = 3英镑，均衡数量 = 30 单位

If the price were set at £5, quantity demanded would fall to 10 while quantity supplied would be 50. This creates a surplus of 40 notebooks, putting downward pressure on price. 如果价格定在5英镑，需求量会降至10而供给量为50，产生40个笔记本的过剩，将使价格面临下行压力。

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6. Specialisation and the Power of Exchange | 专业化与交换的力量

Question 6 (3 marks): Using an example, explain how specialisation can raise productivity and why exchange is essential.

问题6 (3分)：用一个例子解释专业化如何提高生产率，以及为什么交换至关重要。

Specialisation occurs when workers concentrate on a narrow range of tasks, becoming more skilled and efficient. 专业化指工人专注于少量任务，从而更熟练、更有效率。

For instance, on a car assembly line, one worker fits doors while another installs engines. Each becomes faster at their task, raising overall output per hour. 例如，在汽车装配线上，一位工人安装车门，另一位安装发动机。每个人都更快速地完成任务，提高了每小时的总体产出。

However, a specialist cannot produce everything they need, so exchange is necessary — workers trade their wages for goods and services produced by others. 但是，专门从事单一工作的人无法生产自己所需的一切，因此交换必不可少——工人用工资换取他人生产的商品和服务。

This division of labour raises living standards across the whole economy. 这种劳动分工提高了整个经济的生活水平。

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7. The Functions of Money | 货币的功能

Question 7 (3 marks): Identify and briefly explain three functions of money in a modern economy.

问题7 (3分)：指出并简要解释货币在现代经济中的三种功能。

First, money serves as a medium of exchange — it is widely accepted for buying and selling goods and services, removing the need for barter. 第一，货币充当交易媒介——被广泛接受用于买卖商品和服务，消除了以物易物的需要。

Second, money acts as a store of value, allowing people to save and transfer purchasing power from one time period to another. 第二，货币是价值储藏手段，使人们能够储蓄并将购买力从一个时期转移到另一个时期。

Third, money is a unit of account; prices are quoted in a common measure, which makes comparing values and keeping financial records much simpler. 第三，货币是计价单位；价格用统一尺度标示，这大大简化了价值比较和财务记录工作。

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8. Applying Opportunity Cost: Personal and Government Choices | 机会成本的应用：个人与政府的选择

Question 8 (4 marks): Define opportunity cost and give one clear example from an individual’s decision and one from a government’s decision.

问题8 (4分)：定义机会成本，并分别从个人决策和政府决策中各给出一个清晰的例子。

Opportunity cost is the benefit lost from the next best alternative when a choice is made. 机会成本是做出一种选择时所放弃的次优选择带来的利益。

For an individual, a student who spends two hours revising economics instead of working a part-time job forgoes the wages they could have earned. 对个人来说，一名学生花两小时复习经济而不是做兼职，就放弃了本可以赚到的工资。

For a government, if it allocates £500 million to build a new motorway, the opportunity cost might be the schools and hospitals that could have been funded with the same money. 对政府而言，如果它拨款5亿英镑修建一条新高速公路，机会成本可能是本可以用同一笔钱修建的学校和医院。

This concept highlights that every choice involves a trade-off, forcing decision-makers to weigh the benefits of alternatives. 这一概念突显了每个选择都涉及权衡，迫使决策者权衡不同方案的利弊。

Published by TutorHao | Economics Revision Series | aleveler.com

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