Year 7 CCEA Chemistry: Complete Curriculum Breakdown | Year 7 CCEA 化学：课程大纲全面解析

📚 Year 7 CCEA Chemistry: Complete Curriculum Breakdown | Year 7 CCEA 化学：课程大纲全面解析

CCEA Year 7 Chemistry is the first formal step into the world of atoms, reactions and everyday substances. Through practical investigations, pupils learn to connect particle behaviour with the properties of materials they see around them. This guide breaks down every core topic, key vocabulary and skill required to succeed in the Key Stage 3 chemistry classroom in Northern Ireland.

CCEA Year 7 化学课程是学生正式踏入原子、化学反应与日常物质世界的第一步。通过动手探究，学生们将学会把粒子行为与身边材料的性质联系起来。本指南拆解了北爱尔兰 Key Stage 3 化学课堂所需的每一个核心主题、关键词汇与技能，帮助孩子们自信起航。

1. What is Chemistry and What Will You Learn? | 化学是什么，你将学习哪些内容？

Chemistry is the study of substances, their properties and the changes they undergo. In Year 7, the CCEA syllabus builds curiosity by asking questions like: ‘Why does ice melt?’ ‘What makes a cake rise?’ or ‘How can we clean dirty water?’ You will learn to work like a scientist by making predictions, carrying out experiments and recording observations safely.

化学是研究物质、物质性质及其变化的一门科学。在 Year 7，CCEA 课程通过提出诸如“冰为什么会融化？”“蛋糕为什么会膨胀？”或“如何净化脏水？”等问题来激发好奇心。你将学习像科学家一样工作——做出预测、安全地开展实验并记录观察结果。

Main Chemistry Topic	主要化学主题
States of Matter and the Particle Model	物质状态与粒子模型
Elements, Compounds and Mixtures	元素、化合物与混合物
Physical Separation Techniques	物理分离技术
Acids, Alkalis and the pH Scale	酸、碱与 pH 标度
Neutralisation Reactions	中和反应
Simple Chemical Reactions	简单的化学反应

Alongside theory, safety is a central thread. You will learn to recognise hazard symbols, use a Bunsen burner correctly and name common laboratory apparatus such as beakers, conical flasks and measuring cylinders. These practical skills are assessed throughout the year.

除了理论，安全也是一条主线。你将学习识别危险标志、正确使用本生灯并说出烧杯、锥形瓶和量筒等常见实验器材的名称。这些实践技能贯穿全年的评估。

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2. States of Matter and Their Properties | 物质状态及其性质

Everything around you exists as a solid, liquid or gas. The state depends on how strongly the particles are held together and how much energy they have. Solids keep a fixed shape and volume because their particles are packed tightly in a regular pattern, only able to vibrate on the spot. Liquids flow, take the shape of their container and have a fixed volume; their particles are still close but can slide past each other. Gases have no fixed shape or volume because their particles move rapidly in all directions, spreading out to fill any space.

你周围的一切都以固体、液体或气体的形式存在。状态取决于粒子结合的紧密程度以及它们拥有的能量。固体保持固定的形状和体积，因为其粒子紧密地排列成规则模式，只能在原地振动。液体会流动，能随容器形状改变形状，但体积固定；其粒子仍然紧密，但可以相互滑动。气体没有固定的形状或体积，因为其粒子快速地向四面八方运动，扩散并充满任何空间。

State	状态	Particle Arrangement	粒子排列	Particle Movement	粒子运动
Solid	固体	Regular, very close	规则、紧密	Vibrate in place	原地振动
Liquid	液体	Random, close	随机、紧密	Slide past each other	相对滑动
Gas	气体	Random, far apart	随机、远离	Move quickly in all directions	向各方向快速运动

A common Year 7 investigation involves measuring the temperature of water as it melts and boils. Pupils plot a graph with flat sections (plateaus) that show energy is being used to break forces between particles rather than raise the temperature. This introduces the idea of melting point and boiling point as physical properties that can help identify a pure substance.

Year 7 常见的探究活动是测量冰融化和水沸腾时的温度。学生会绘制一张带有平台期的曲线图，这些平台期表明能量正被用于克服粒子间的作用力，而不是升高温度。这引出了熔点和沸点的概念——作为能帮助鉴别纯物质的物理性质。

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3. The Particle Model and Changes of State | 粒子模型与状态变化

The particle model is a simplified way of explaining why substances behave differently in each state. It states that all matter is made of tiny particles that are in constant motion. When a solid is heated and melts, the particles gain energy, vibrate more strongly and overcome some of the attractive forces holding them in fixed positions. This model helps visualise processes such as melting, freezing, boiling, condensing and sublimation.

粒子模型是解释物质在不同状态下为何表现出不同行为的一种简化方式。它指出，所有物质都由不断运动的微小粒子组成。当固体受热熔化时，粒子获得能量，振动加剧，克服了部分将其固定在原地的吸引力。该模型有助于直观理解熔化、凝固、沸腾、冷凝和升华等过程。

Solid → Liquid (melting) | 固体 → 液体（熔化）

Liquid → Gas (boiling/evaporation) | 液体 → 气体（沸腾/蒸发）

Gas → Liquid (condensing) | 气体 → 液体（冷凝）

In the classroom, you might heat stearic acid in a test tube placed in a water bath and record the temperature every 30 seconds until it solidifies again. The results reinforce that a change of state is a physical change—no new substance is made, and the process is easily reversed. The same particles are present; only their arrangement and energy change.

在课堂上，你可能会将硬脂酸放在水浴中的试管里加热，并每隔 30 秒记录一次温度直到它再次凝固。结果强化了一个概念：状态变化是物理变化——没有新物质生成，且该过程很容易逆转。存在的还是同一些粒子，改变的只是它们的排列与能量。

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4. Elements, Compounds and Mixtures | 元素、化合物与混合物

An element is a pure substance made of only one type of atom. There are about 100 naturally occurring elements, and they are organised in the Periodic Table. Each element is represented by a chemical symbol, such as O for oxygen, Fe for iron and Na for sodium. You will learn the symbols of at least the first 20 elements and others like copper (Cu), zinc (Zn) and gold (Au).

元素是仅由一种原子组成的纯物质。自然界大约有 100 种元素，它们被排布在元素周期表中。每种元素用一个化学符号表示，例如 O 代表氧，Fe 代表铁，Na 代表钠。你将至少记住前 20 号元素以及像铜 (Cu)、锌 (Zn) 和金 (Au) 等元素的符号。

When two or more elements chemically join in fixed proportions, they form a compound. The properties of a compound are usually completely different from the elements it contains. For example, sodium is a highly reactive metal and chlorine is a toxic green gas, yet the compound they form, sodium chloride (NaCl), is the safe table salt we eat daily. A mixture, on the other hand, consists of two or more substances not chemically combined. They keep their original properties and can usually be separated by physical means like filtration or distillation.

当两种或多种元素以固定比例发生化学结合时，就生成了化合物。化合物的性质通常与组成它的元素完全不同。例如，钠是一种极易反应的金属，氯是一种有毒的绿色气体，但它们形成的化合物氯化钠 (NaCl) 却是我们日常食用的安全食盐。而混合物则是由两种或多种未发生化学结合的物质组成。它们保持原有性质，通常可通过过滤或蒸馏等物理方法进行分离。

Category | 类别	Example | 例子	Type of Formula | 表示方式
Element | 元素	Oxygen, aluminium | 氧气、铝	O₂, Al
Compound | 化合物	Water, carbon dioxide | 水、二氧化碳	H₂O, CO₂
Mixture | 混合物	Air, salt water | 空气、盐水	No chemical formula | 无化学式

Classic Year 7 practical: mix iron filings and sulfur powder. A magnet easily separates the iron because it is a mixture. Heat the same mixture in a fume cupboard, and a black solid, iron sulfide (FeS), forms. A magnet no longer works because a new compound with new properties has been created.

经典的 Year 7 实验：混合铁屑和硫粉。磁铁能轻易分离出铁，因为这是一个混合物。在通风橱中加热同一混合物，会生成黑色固体硫化亚铁 (FeS)。此时磁铁不再起作用，因为一个具有新性质的化合物已经生成。

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5. Separating Mixtures – Practical Techniques | 混合物分离 – 实用技术

Being able to separate mixtures is an essential laboratory skill. The method chosen depends on the physical properties of the substances present. Filtration separates an insoluble solid from a liquid, like sand from water, using filter paper and a funnel. Evaporation and crystallisation can then recover a dissolved solid, such as salt from salt water, by gently heating the solution so the liquid evaporates, leaving crystals behind.

能够分离混合物是一项基本的实验技能。选择哪种方法取决于所存在的物质的物理性质。过滤利用滤纸和漏斗将不溶性固体从液体中分离出来，例如沙子与水。接下来，可以通过蒸发和结晶来回收溶解的固体，比如从盐水中提取盐：温和加热溶液使液体蒸发，留下盐的晶体。

Chromatography is a colourful technique often used to separate mixtures of coloured compounds, such as the dyes in ink or food colouring. A spot of the mixture is placed on filter paper, a solvent travels up the paper, and the different components move at different speeds. Distillation is introduced when the liquid itself needs to be collected, as in obtaining pure water from seawater. In simple distillation, the solution is boiled, and the vapour is cooled and condensed back into a liquid in a receiving flask.

色谱法是一种色彩缤纷的技术，常用于分离混合物中的有色化合物，如墨水或食用色素的染料。将混合物的一个斑点点在滤纸上，溶剂沿滤纸上升，不同成分因移动速度不同而被分开。当需要收集液体本身时，例如从海水中获取纯水，就会引入蒸馏法。在简单蒸馏中，将溶液煮沸，蒸气被冷却后在接收瓶里重新冷凝成液体。

• Filtration – separates an insoluble solid from a liquid (sand from water).

  过滤 – 将不溶性固体从液体中分离（沙子与水）。

• Evaporation / Crystallisation – obtains a dissolved solid from a solution (salt from sea water).

  蒸发 / 结晶 – 从溶液中获得溶解的固体（从海水提取盐）。

• Simple distillation – separates a liquid from a solid solution and collects the liquid (pure water from salt water).

  简单蒸馏 – 从固体溶液中分离液体并加以收集（从盐水提取纯水）。

• Chromatography – separates coloured substances that dissolve in a solvent.

  色谱法 – 分离溶解在溶剂中的有色物质。

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6. Acids, Alkalis and the pH Scale | 酸、碱与 pH 标度

Acids and alkalis are chemical opposites. An acid is a substance that releases hydrogen ions (H⁺) in water, giving it a sour taste and corrosive properties. Common laboratory acids include hydrochloric acid (HCl), sulfuric acid (H₂SO₄) and nitric acid (HNO₃). Alkalis are soluble bases that release hydroxide ions (OH⁻) in water; they feel soapy and can also be corrosive. Examples include sodium hydroxide (NaOH) and potassium hydroxide (KOH).

酸与碱是化学上的对立者。酸是在水中释放氢离子 (H⁺) 的物质，具有酸味和腐蚀性。常见的实验室酸包括盐酸 (HCl)、硫酸 (H₂SO₄) 和硝酸 (HNO₃)。碱是可溶性的碱，在水中释放氢氧根离子 (OH⁻)，摸起来有滑腻感，同样具有腐蚀性。例子包括氢氧化钠 (NaOH) 和氢氧化钾 (KOH)。

The pH scale runs from 0 to 14 and shows how strong or weak an acid or alkali is. A pH of 7 is neutral (pure water). Values below 7 are acidic, with 0 being the strongest acid. Values above 7 are alkaline, with 14 being the strongest alkali. Year 7 students learn to use indicators like litmus paper (red in acid, blue in alkali) and universal indicator, which gives a rainbow of colours depending on the pH value.

pH 标度从 0 到 14，显示酸或碱的强度。pH 7 为中性（纯净水）。低于 7 为酸性，0 是最强酸；高于 7 为碱性，14 是最强碱。Year 7 学生学习使用指示剂，如石蕊试纸（酸性变红，碱性变蓝）和通用指示剂，后者会根据 pH 值呈现一系列彩虹颜色。

pH Range | pH 范围	Description | 描述	Example | 例子
0 – 2	Strong acid | 强酸	Stomach acid, car battery acid | 胃酸、汽车电池酸
3 – 6	Weak acid | 弱酸	Vinegar, lemon juice | 醋、柠檬汁
7	Neutral | 中性	Pure water, blood | 纯水、血液
8 – 11	Weak alkali | 弱碱	Soap, toothpaste | 肥皂、牙膏
12 – 14	Strong alkali | 强碱	Bleach, oven cleaner | 漂白剂、烤箱清洁剂

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7. Neutralisation – Acid Meets Alkali | 中和 – 酸遇上碱

When an acid and an alkali are mixed in the right proportions, they cancel one another out. This is called neutralisation. The hydrogen ions (H⁺) from the acid react with the hydroxide ions (OH⁻) from the alkali to form water, while the remaining parts produce a salt. The general word equation is:

当酸和碱以适当比例混合时，它们会互相消除。这叫做中和反应。酸中的氢离子 (H⁺) 与碱中的氢氧根离子 (OH⁻) 结合生成水，而剩下的部分则生成一种盐。通用的文字方程式为：

Acid + Alkali → Salt + Water

酸 + 碱 → 盐 + 水

A specific reaction studied in Year 7 is hydrochloric acid mixed with sodium hydroxide solution:

Year 7 中学习的一个具体反应是盐酸与氢氧化钠溶液的反应：

HCl + NaOH → NaCl + H₂O

Everyday applications make this topic memorable. Stinging nettles inject a mild acid, and the traditional remedy of rubbing a dock leaf works because the leaf contains a mild alkali. Toothpaste is slightly alkaline to neutralise the acids produced by bacteria in the mouth. Farmers spread lime (an alkali) on soil that is too acidic for healthy crop growth. In the lab, you will carry out a titration-style investigation using a burette or pipette, adding acid drop by drop to an alkali containing universal indicator until you achieve a green neutral colour.

生活中的应用让这一主题令人印象深刻。荨麻会注入一种弱酸，传统用酸模叶子擦拭的疗法之所以有效，是因为叶子里含有温和的碱。牙膏略呈碱性，用来中和口腔细菌产生的酸。农民在酸性过强不利于庄稼生长的土壤上撒石灰（碱）。在实验室中，你将使用滴定管或移液管进行类似滴定的探究，向含通用指示剂的碱液中逐滴加入酸液，直到溶液变为绿色中性。

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8. Simple Chemical Reactions in Year 7 | Year 7 中的简单化学反应

Chemical reactions are processes where new substances are made. Signs that a chemical reaction has occurred include a colour change, temperature change, gas production (fizzing or bubbles

Published by TutorHao | Year 7 Chemistry Revision Series | aleveler.com

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