📚 Year 7 WJEC Chemistry: Complete Syllabus Breakdown | Year 7 WJEC 化学：课程大纲全面解析
Welcome to your complete guide to the Year 7 WJEC Chemistry syllabus. This article breaks down every key topic you will study during your first year of secondary school chemistry in Wales. We will explore the fundamental ideas that build the foundation for all future learning in this fascinating subject. From the particles that make up every object around you to the reactions that create new substances, this overview will help you understand what to expect and how to prepare.
欢迎阅读 Year 7 WJEC 化学课程大纲完全指南。本文将为你拆解在威尔士中学第一年化学课中需要学习的每一个核心主题。我们将一起探索那些奠定未来所有学习基础的化学基本概念——从构成你周围万物的微粒，到创造新物质的化学反应。这篇概览将帮助你了解课程内容，并做好学习准备。
1. Introduction to Chemistry | 化学入门
Chemistry is the study of matter and the changes it undergoes. In Year 7 WJEC Chemistry, you start by asking big questions: what is everything made of, and why do substances behave differently? You will learn that chemistry is not just about mixing colourful liquids in a lab; it is the science behind cooking, cleaning, breathing and even the screen you are reading this on. The syllabus encourages curiosity and teaches you to think like a scientist by observing, predicting and explaining everyday phenomena.
化学是研究物质及其变化的学科。在 Year 7 WJEC 化学课程中，你将从一些大问题开始：万物由什么构成？为什么不同物质的表现如此不同？你将发现，化学不仅仅是实验室里混合彩色液体那么简单——它是烹饪、清洁、呼吸乃至你正看着的这块屏幕背后的科学。课程鼓励你保持好奇心，通过观察、预测和解释日常现象，教会你像科学家一样思考。
2. States of Matter | 物质的状态
Everything around you exists as a solid, a liquid or a gas. These are the three states of matter. In solids, particles are packed tightly in a fixed arrangement and can only vibrate. In liquids, particles are close but can slide past each other, so liquids can flow. In gases, particles are far apart and move quickly in all directions. You will learn to use the particle model to explain properties such as why solids keep their shape, why liquids take the shape of their container and why gases spread out to fill any space.
你周围的一切物质都以固态、液态或气态存在，这就是物质的三态。固态时，粒子紧密排列在固定位置上，只能振动；液态时，粒子靠得很近但可以相互滑动，因此液体可以流动；气态时，粒子相距很远并快速向各个方向运动。你将学习使用粒子模型来解释各种性质：为什么固体能保持形状，为什么液体能随容器改变形状，以及为什么气体会扩散并充满整个空间。
3. Changes of State | 状态变化
Substances can change from one state to another when heated or cooled. Melting is the change from solid to liquid, freezing is the reverse. Boiling and evaporation change a liquid into a gas, while condensation turns a gas back into a liquid. The WJEC syllabus expects you to understand these processes using the particle model: heating gives particles more energy, making them move apart and break the forces holding them together. You will also learn about the difference between boiling and evaporation, and why the mass of a substance stays the same during a change of state.
物质在加热或冷却时可以从一种状态变成另一种状态。熔化是从固态变为液态，凝固则相反。沸腾和蒸发都能使液体变为气体，而凝结是气体变回液体。WJEC 课程要求你用粒子模型理解这些过程：加热给粒子更多能量，使它们相互远离并挣脱维持在一起的力。你还将学习沸腾与蒸发的区别，以及为什么质量在状态变化过程中保持不变。
4. Atoms, Elements and the Periodic Table | 原子、元素和周期表
All matter is made up of tiny particles called atoms. An element is a substance made up of only one type of atom. Each element has a name and a chemical symbol, such as O for oxygen, Fe for iron and Na for sodium. The periodic table organises all known elements in a clever way that reveals patterns in their behaviour. In Year 7, you will learn to locate metals and non-metals on the table, and you will meet the first 20 elements. You will also discover that elements in the same group have similar properties.
所有物质都由称为原子的微小粒子构成。元素是完全由同一种原子组成的物质。每种元素都有名称和化学符号，例如 O 代表氧、Fe 代表铁、Na 代表钠。周期表以一种巧妙的方式将所有已知元素列在一起，并揭示出它们行为上的规律。在 Year 7，你将学会在周期表中找到金属和非金属的位置，也会认识前 20 种元素，并发现同一族的元素具有相似的性质。
5. Compounds and Mixtures | 化合物和混合物
When atoms of different elements chemically join together, they form a compound. A compound has completely different properties from the elements that made it. For example, water (H₂O) is a liquid made from hydrogen (a gas) and oxygen (a gas). A mixture contains two or more substances that are not chemically combined, so each substance keeps its own properties. Air is a mixture of gases, and seawater is a mixture of water and dissolved salts. You will learn how to separate mixtures using methods like filtration, evaporation and distillation.
当不同元素的原子通过化学方式结合在一起时，就形成了化合物。化合物的性质与构成它的元素完全不同。例如，水（H₂O）是一种液体，却由氢气（一种气体）和氧气（一种气体）结合而成。混合物包含两种或多种没有化学结合的物质，因此每种物质保持自身性质。空气是气体的混合物，海水则是水与溶解盐类的混合物。你将学习如何利用过滤、蒸发和蒸馏等方法分离混合物。
6. Chemical Reactions | 化学反应
oducts. You can spot a chemical reaction by looking for signs such as a colour change, a gas being given off (bubbles), a temperature change, or a solid forming (a precipitate). In Year 7, you will learn to write simple word equations, for example: magnesium + oxygen → magnesium oxide. The syllabus also introduces the important idea that in a chemical reaction, the total mass of products equals the total mass of reactants – this is the law of conservation of mass.
当原子重新排列形成新物质时，就发生了化学反应。起始物质称为反应物，新物质称为生成物。你可以通过一些现象识别化学反应：颜色变化、气体放出（气泡）、温度变化，或者固体生成（沉淀）。在 Year 7，你将学习书写简单的文字方程式，例如：镁 + 氧气 → 氧化镁。课程还会引入一个重要概念：在化学反应中，生成物的总质量等于反应物的总质量——这就是质量守恒定律。
7. Acids and Alkalis | 酸和碱
Acids and alkalis are two important families of chemicals. Acids have a sour taste (though you should never taste chemicals in the lab) and can be corrosive. Common laboratory acids include hydrochloric acid (HCl), sulfuric acid (H₂SO₄) and nitric acid (HNO₃). Alkalis are the chemical opposites of acids; they feel soapy and can also be corrosive. Household alkalis include baking soda and soap. You will learn how to use an indicator, such as litmus paper or universal indicator, to test whether a substance is acidic, neutral or alkaline. The pH scale runs from 0 (strongly acidic) to 14 (strongly alkaline), with 7 being neutral.
酸和碱是两类重要的化学物质。酸有酸味（但在实验室绝不可品尝化学品），可能具有腐蚀性。实验室里常见的酸包括盐酸（HCl）、硫酸（H₂SO₄）和硝酸（HNO₃）。碱是酸的对立面，摸起来有滑腻感，也可能有腐蚀性。家用碱包括小苏打和肥皂。你将学习如何使用指示剂——比如石蕊试纸或通用指示剂——来检测一种物质是酸性、中性还是碱性。pH 值范围从 0（强酸性）到 14（强碱性），7 表示中性。
8. Metals and Non-metals | 金属与非金属
The periodic table can be divided into metals on the left and non-metals on the right. Metals are usually shiny, good conductors of heat and electricity, and can be bent or stretched into wires (malleable and ductile). Examples include iron, copper and gold. Non-metals are typically dull, poor conductors, and brittle when solid. Oxygen, carbon and sulfur are non-metals. You will investigate the reactions of metals with oxygen and with acids, observing how different metals behave. These reactions produce metal oxides and salts and often release hydrogen gas.
周期表可分为左边的金属和右边的非金属。金属通常有光泽，是热和电的良导体，还能被弯曲或拉成丝（具有延展性和韧性），例如铁、铜和金。非金属通常没有光泽，导电导热性差，固态时脆性易碎。氧、碳和硫都属于非金属。你将研究金属与氧气以及与酸的反应，观察不同金属的行为。这些反应会生成金属氧化物和盐，并常常释放出氢气。
9. Earth's Resources and Recycling | 地球资源与循环利用
Chemistry connects closely with the world around us. In this part of the syllabus, you will learn about natural resources such as air, water, rocks and fossil fuels. The Earth provides raw materials that we use for energy, construction and making all sorts of products. However, many resources are finite, meaning they cannot be replaced once used up. This leads to the importance of recycling. You will explore how recycling metals, glass and plastics reduces the need to extract new materials, saves energy and helps protect the environment.
化学与我们周围的世界紧密相连。在课程大纲的这一部分，你将学习空气、水、岩石和化石燃料等自然资源。地球为我们提供了用于能源、建筑和制造各种产品的原材料。然而，许多资源是有限的，意味着一旦用完就无法再生。这就引出了回收利用的重要性。你将探索回收金属、玻璃和塑料如何减少对开采新资源的需求，节约能源并帮助保护环境。
10. Practical Skills and Safety | 实验技能与安全
Doing experiments is a core part of Year 7 WJEC Chemistry. You will learn how to work safely in a laboratory by wearing eye protection, tying back long hair, and never eating or drinking. You will practise using equipment such as Bunsen burners, test tubes, beakers, measuring cylinders and thermometers. The syllabus develops your ability to make careful observations, record results in tables, and draw simple graphs. You will also be introduced to variables in an investigation – the independent, dependent and control variables – and how to carry out a fair test.
动手实验是 Year 7 WJEC 化学的核心部分。你将学会如何在实验室里安全工作：佩戴护目镜、扎起长发、绝不饮食。你会练习使用本生灯、试管、烧杯、量筒和温度计等器材。课程还将培养你仔细观察、用表格记录结果和绘制简单图表的能力。你还会初步认识实验中的变量——自变量、因变量和控制变量——以及如何进行公平的测试。
11. Everyday Chemistry and Careers | 日常化学与职业前景
Chemistry is not just a school subject; it is a part of everyday life. Baking a cake involves chemical reactions that produce carbon dioxide to make the cake rise. The cleaning products you use at home often rely on acids or alkalis to break down grease and dirt. Medicines, fuels, fabrics and fertilisers all come from chemical processes. The WJEC syllabus helps you see these connections and opens your eyes to careers in pharmacy, environmental science, forensics, food technology and many other exciting fields. Understanding chemistry now gives you skills for the future, whether you become a scientist or simply a curious citizen of the world.
化学不仅仅是一门学校课程；它也是日常生活的一部分。烤蛋糕时，发生的化学反应会产生二氧化碳使蛋糕膨胀；你家中使用的清洁产品常常依赖酸或碱来分解油污和灰尘。药物、燃料、面料和肥料都来自化学过程。WJEC 课程帮助你看到这些联系，并让你了解到制药、环境科学、法医学、食品技术等众多激动人心领域的职业前景。现在学好化学，就能为你未来培养技能，无论你将来成为一名科学家，还是只想做一个充满好奇的世界公民。
Published by TutorHao | Chemistry Revision Series | aleveler.com
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