📚 Year 8 WJEC Biology: Summer Preview & Bridging Course | WJEC 八年级生物：暑期预习与衔接课程
Summer is the perfect time to get a head start on your Year 8 Biology studies. This bridging course will help you revise key Year 7 concepts and introduce the exciting topics you’ll explore in Year 8, following the WJEC curriculum. With a mix of theory and practical advice, you'll build confidence and curiosity about the living world.
暑假是为八年级生物学习抢占先机的最佳时机。本衔接课程将帮助你复习七年级的关键概念，并介绍根据 WJEC 课程大纲你将在八年级探索的精彩主题。通过理论与实用建议的结合，你将建立对生命世界的信心与好奇心。
1. Welcome to Year 8 Biology | 欢迎来到八年级生物
Biology is the study of living organisms and life processes. In Year 8, you will dive deeper into how cells work, how bodies are organised, and how organisms interact with their environment. WJEC’s approach encourages hands-on investigation and scientific thinking.
生物学是研究生物体和生命过程的学科。在八年级，你将更深入地了解细胞如何工作、身体如何组织，以及生物如何与环境相互作用。WJEC 的教学方法鼓励动手探究和科学思维。
This bridging course is designed to make the transition smooth, whether you’re reviewing basics or previewing new material.
本衔接课程旨在让过渡变得顺畅，无论你是在复习基础还是预习新内容。
2. What Will You Learn? | 你将学习什么？
Year 8 WJEC Biology covers several core themes: cells and organisation, nutrition and digestion, gas exchange and respiration, photosynthesis, ecosystems, and microorganisms. You will also develop practical skills such as using microscopes, conducting experiments, and recording data.
八年级 WJEC 生物涵盖几个核心主题：细胞与组织、营养与消化、气体交换与呼吸作用、光合作用、生态系统和微生物。你还将培养实用技能，如使用显微镜、进行实验和记录数据。
By the end of the year, you should be able to explain how living systems work and apply your knowledge to new situations.
到学年结束时，你应该能够解释生命系统如何运作，并将知识应用于新情境。
3. Key Concepts from Year 7 | 七年级关键概念复习
Before exploring Year 8 topics, it helps to recall what you learned in Year 7. You probably covered the seven life processes (MRS GREN: Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, Nutrition), basic cell structure, and simple food chains.
在探索八年级主题之前，回忆一下七年级所学的内容会很有帮助。你可能已经学习了七个生命过程（MRS GREN：运动、呼吸作用、感应、生长、繁殖、排泄、营养）、基本细胞结构和简单的食物链。
These ideas form the foundation for more advanced concepts, so we’ll revisit them briefly.
这些理念构成了更高级概念的基础，因此我们将简要回顾它们。
MRS GREN helps us decide whether something is alive. For instance, a car moves but does not grow or reproduce, so it’s non-living.
MRS GREN 帮助我们判断某物是否为生物。例如，汽车可以移动但不会生长或繁殖，所以它是非生物。
4. Cells: Building Blocks of Life | 细胞：生命的基石
All living organisms are made of cells. You’ll learn to distinguish between animal and plant cells, and to label key structures: nucleus, cytoplasm, cell membrane, mitochondria, cell wall, chloroplasts, and permanent vacuole.
所有生物体都由细胞构成。你将学会区分动物细胞和植物细胞，并标注关键结构：细胞核、细胞质、细胞膜、线粒体、细胞壁、叶绿体和永久液泡。
Plant cells have a rigid cell wall, chloroplasts for photosynthesis, and a large central vacuole, while animal cells lack these.
植物细胞有坚硬的细胞壁、用于光合作用的叶绿体和一个中央大液泡，而动物细胞没有这些结构。
eyepiece lens magnification × objective lens magnification when using a light microscope.
在使用光学显微镜时，你还将使用公式：总放大倍数 = 目镜放大倍数 × 物镜放大倍数。
5. Organisation: From Cells to Systems | 组织：从细胞到系统
Cells with similar functions group into tissues. Tissues form organs, and organs work together in organ systems. For example, muscle cells form muscle tissue, the heart is an organ, and the circulatory system includes the heart, blood, and blood vessels.
具有相似功能的细胞组成组织。组织形成器官，器官协同工作构成器官系统。例如，肌细胞组成肌肉组织，心脏是一个器官，循环系统包括心脏、血液和血管。
In Year 8, you’ll explore the digestive system, respiratory system, and reproductive system in plants, seeing how organisation allows efficient functioning.
在八年级，你将探索消化系统、呼吸系统和植物的生殖系统，了解组织如何实现高效运作。
6. Nutrition and Digestion | 营养与消化
A balanced diet provides all the nutrients needed for energy, growth, and repair. You’ll learn about carbohydrates, proteins, lipids, vitamins, minerals, fibre, and water. Each nutrient has a specific role: carbohydrates for energy, proteins for growth and repair, lipids for insulation and energy storage.
均衡的膳食提供能量、生长和修复所需的所有营养素。你将学习碳水化合物、蛋白质、脂质、维生素、矿物质、纤维和水。每种营养素都有特定作用：碳水化合物提供能量，蛋白质用于生长和修复，脂质用于保温和储能。
Digestion breaks down large food molecules into smaller, soluble ones that can be absorbed into the blood. You’ll follow the journey from mouth to anus, learning about enzymes like amylase and protease, and the role of the liver and pancreas.
消化将大食物分子分解成较小的可溶性分子，以便被血液吸收。你将跟随食物从口腔到肛门的旅程，了解淀粉酶和蛋白酶等酶的作用，以及肝脏和胰腺的功能。
A simple experiment to test for starch using iodine solution is a classic practical.
用碘液检测淀粉的简单实验是一个经典实践活动。
7. Respiration and Breathing | 呼吸作用与呼吸
n dioxide + water (+ energy). Breathing, on the other hand, is the mechanical process of moving air in and out of the lungs.
呼吸作用是一个从葡萄糖中释放能量的化学过程，发生在每个活细胞中。文字方程式为：葡萄糖 + 氧气 → 二氧化碳 + 水（+ 能量）。而呼吸是将空气吸入和排出肺部的机械过程。
You will explore the structure of the respiratory system, including the trachea, bronchi, alveoli, and diaphragm. Gaseous exchange happens in the alveoli where oxygen diffuses into the blood and carbon dioxide diffuses out.
你将探索呼吸系统的结构，包括气管、支气管、肺泡和横膈膜。气体交换在肺泡中进行，氧气扩散进入血液，二氧化碳扩散出去。
Exercise affects breathing rate and heart rate, and you can design investigations to measure these changes.
运动会影响呼吸率和心率，你可以设计探究实验来测量这些变化。
8. Photosynthesis and Plants | 光合作用与植物
de + water → glucose + oxygen, using light energy absorbed by chlorophyll in chloroplasts.
植物通过光合作用制造自己的食物。文字方程式为：二氧化碳 + 水 → 葡萄糖 + 氧气，利用叶绿体中的叶绿素吸收的光能。
You will learn how leaves are adapted for photosynthesis, with a large surface area, stomata for gas exchange, and veins for transport. The glucose produced can be used for respiration, stored as starch, or converted into cellulose for cell walls.
你将学习叶片如何适应光合作用，具有大的表面积、用于气体交换的气孔以及用于运输的叶脉。生成的葡萄糖可用于呼吸作用、以淀粉形式储存或转化为细胞壁的纤维素。
Practical investigations often test for starch in leaves or measure the effect of light intensity on photosynthesis rate using pondweed.
实验探究通常检测叶片中的淀粉，或使用水草测量光照强度对光合作用速率的影响。
9. Ecosystems and Food Webs | 生态系统与食物网
An ecosystem includes all the living organisms and their physical environment. You will study how energy flows through food chains and webs, and how to use pyramids of numbers and biomass.
一个生态系统包括所有生物及其物理环境。你将研究能量如何通过食物链和食物网流动，以及如何使用数量金字塔和生物量金字塔。
Producers (plants) capture energy from sunlight. Consumers eat other organisms, and decomposers break down dead material. Understanding predator-prey relationships and the impact of environmental changes like deforestation or pollution is key.
生产者（植物）从阳光中捕获能量。消费者以其他生物为食，分解者分解死去的物质。理解捕食者-猎物关系以及森林砍伐或污染等环境变化的影响是关键。
You might build your own food web and predict what happens if one species is removed.
你可以构建自己的食物网并预测如果移除一个物种会发生什么。
10. Microbes and Disease | 微生物与疾病
Microorganisms, or microbes, include bacteria, viruses, fungi, and protists. Many are harmless or beneficial, but some cause diseases. You’ll learn about the germ theory of disease and how the body defends itself, including the role of white blood cells.
微生物包括细菌、病毒、真菌和原生生物。许多是无害或有益的，但有些会导致疾病。你将学习疾病的细菌学说，以及身体如何自我防御，包括白细胞的作用。
Practical skills may involve growing bacteria on agar plates safely, investigating the effectiveness of antibiotics or disinfectants, and understanding hygiene practices.
实验技能可能涉及在琼脂平板上安全地培养细菌、研究抗生素或消毒剂的有效性，并理解卫生习惯。
You’ll also discuss vaccination and how antibiotics work against bacteria but not viruses.
你还将讨论疫苗接种，以及抗生素如何对抗细菌但对病毒无效。
11. Practical Skills and Safety | 实验技能与安全
WJEC emphasizes scientific enquiry. You’ll learn to plan experiments, identify variables (independent, dependent, control), take accurate measurements, and present results in tables and graphs.
WJEC 强调科学探究。你将学习计划实验、识别变量（自变量、因变量、控制变量）、进行准确测量，并用表格和图表展示结果。
Safety is paramount: always wear goggles when using heat or chemicals, tie back long hair, and know the hazard symbols on reagent bottles.
安全至关重要：使用加热设备或化学品时始终戴护目镜，束起长发，并了解试剂瓶上的危险符号。
A typical investigation might involve testing the effect of temperature on yeast fermentation by measuring carbon dioxide production.
一项典型的探究可能涉及通过测量二氧化碳产生量来测试温度对酵母发酵的影响。
12. Study Tips for Success | 学习成功秘诀
To make the most of Year 8 Biology, stay curious and organised. Use flashcards for key terms like ‘alveoli’ and ‘photosynthesis’. Draw labelled diagrams of cells and systems. Watch short educational videos to visualise processes.
为了充分利用八年级生物课程，保持好奇心和条理性。使用抽认卡记忆关键术语，如“肺泡”和“光合作用”。绘制带标签的细胞和系统图。观看简短的教育视频以可视化过程。
Regularly review your notes and attempt practice questions. Don’t hesitate to ask your teacher for clarification. Connecting new ideas to real-life examples, such as digestion after a meal or plant growth in your garden, deepens understanding.
定期复习笔记并尝试练习题。不要犹豫，向老师请教。将新想法与真实生活例子联系起来，比如餐后消化或花园里的植物生长，可以加深理解。
Enjoy the journey of discovering how life works!
享受发现生命如何运作的旅程！
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