📚 Year 7 AQA Biology: Summer Preparation and Bridging Course | Year 7 AQA 生物：暑期预习与衔接课程
Welcome to your Year 7 AQA Biology summer bridging course! This guide will help you transition smoothly into secondary school science by introducing key biological concepts in a clear, engaging way. You will explore cells, human body systems, ecosystems, and the skills of scientific enquiry. By the end, you will feel confident and ready to tackle your biology lessons in September.
欢迎参加 Year 7 AQA 生物暑期衔接课程！本指南将以清晰、有趣的方式介绍关键生物学概念，帮助你顺利过渡到中学科学学习。你将探索细胞、人体系统、生态系统以及科学探究技能。学完后，你将充满信心，为九月的生物课做好准备。
1. What is Biology? | 什么是生物学？
Biology is the study of living organisms and life processes. It explores how plants, animals, and microorganisms function, grow, and interact with their environment. In Year 7, you will start with the basics: cells, human biology, and ecology.
生物学是研究生物体和生命过程的学科。它探索植物、动物和微生物如何运作、生长以及与环境互动。在七年级，你将从基础开始：细胞、人体生物学和生态学。
All living things share seven life processes: movement, respiration, sensitivity, growth, reproduction, excretion, and nutrition (often remembered as MRS GREN).
所有生物都具有七大生命过程：运动、呼吸、感应、生长、繁殖、排泄和营养（常记为 MRS GREN）。
Understanding these processes helps you classify something as living or non‑living. For example, a car moves and uses fuel, but it does not grow or reproduce, so it is not alive.
理解这些过程有助于你判断某物是生物还是非生物。例如，汽车能移动并使用燃料，但它不能生长或繁殖，因此不是生物。
2. Introduction to Cells | 细胞入门
Cells are the building blocks of life. Every organism is made of cells, which carry out all life functions. There are two main types: plant cells and animal cells. Both share common parts like the nucleus, cytoplasm and cell membrane, while plant cells have extra structures such as a cell wall, chloroplasts and a large central vacuole.
细胞是生命的构建单位。每个生物体都由细胞构成，细胞执行所有生命功能。主要分两类：植物细胞和动物细胞。两者共有细胞核、细胞质和细胞膜，而植物细胞还有细胞壁、叶绿体和大液泡等结构。
The nucleus controls the cell's activities and contains genetic material. The cytoplasm is a jelly‑like substance where chemical reactions happen. The cell membrane controls what enters and leaves the cell.
细胞核控制细胞活动并含有遗传物质。细胞质是果冻状物质，化学反应在此发生。细胞膜控制物质的进出。
Plant cells have chloroplasts that absorb light for photosynthesis, and a rigid cell wall made of cellulose for support. They also store water in a large vacuole.
植物细胞有叶绿体吸收光进行光合作用，以及由纤维素构成的坚硬细胞壁起支持作用。它们还将水储存在大液泡中。
3. Using a Microscope | 使用显微镜
To observe cells, you need a microscope. In Year 7, you will learn to use a light microscope safely and correctly. A microscope magnifies tiny objects, making the invisible visible.
为了观察细胞，你需要显微镜。在七年级，你将学习如何安全、正确地使用光学显微镜。显微镜能放大微小物体，使不可见变为可见。
Key parts include the eyepiece lens, objective lenses, stage, and focus knobs. You start with the lowest power objective lens, use the coarse focus first, then fine focus to get a sharp image.
关键部件包括目镜、物镜、载物台和调焦旋钮。你应先使用低倍物镜，先用粗准焦螺旋，再用细准焦螺旋调出清晰图像。
When preparing a slide, you place the specimen on a glass slide, add a drop of water, and cover with a coverslip at an angle to avoid air bubbles. Always handle the microscope with care.
制作装片时，将标本放在载玻片上，加一滴水，然后以一定角度盖上盖玻片以避免气泡。务必小心使用显微镜。
4. Levels of Organisation | 组织层次
→ organs → organ systems → organism. Understanding this hierarchy is essential in biology.
细胞共同作用形成更大结构。多细胞生物的组织层次为：细胞 → 组织 → 器官 → 器官系统 → 生物体。理解这一层次对生物学至关重要。
A tissue is a group of similar cells performing the same function, like muscle tissue. An organ is made of different tissues working together, such as the heart. Organ systems, like the circulatory system, group several organs.
组织是一群执行相同功能的相似细胞，例如肌肉组织。器官由不同组织协同工作构成，如心脏。器官系统（如循环系统）将多个器官组合在一起。
In plants, for example, the leaf is an organ containing epidermal tissue, palisade mesophyll and vascular tissue, all combining to capture light and make food.
例如，在植物中，叶是一个器官，包含表皮组织、栅栏组织和维管组织，共同捕获光并制造食物。
5. The Skeletal and Muscular Systems | 骨骼与肌肉系统
Your skeleton provides support, protects internal organs, and allows movement by working with muscles. Bones are living tissues that grow and repair themselves. The human skeleton contains over 200 bones.
你的骨骼提供支撑、保护内脏器官，并与肌肉协作实现运动。骨骼是活组织，能生长和自我修复。人体骨骼包含200多块骨头。
Joints are places where bones meet. Some joints, like the knee and elbow, are hinge joints allowing movement in one direction. Others, like the shoulder, are ball‑and‑socket joints for a wider range of motion.
关节是骨骼相接之处。有些关节如膝关节和肘关节是铰链关节，允许单向运动。其他如肩关节是球窝关节，运动范围更广。
Muscles contract and relax to pull on bones. They work in antagonistic pairs: for example, the biceps contract while the triceps relax to bend the arm. Ligaments connect bones, and tendons connect muscle to bone.
肌肉收缩和舒张以拉动骨骼。它们成对拮抗工作：例如，二头肌收缩而三头肌舒张使手臂弯曲。韧带连接骨骼，肌腱连接肌肉与骨骼。
6. Nutrition and Digestion | 营养与消化
A balanced diet provides the nutrients your body needs: carbohydrates for energy, proteins for growth and repair, fats for insulation and energy storage, vitamins and minerals for health, fibre for digestion, and water. A deficiency in any nutrient can cause health
Published by TutorHao | Year 7 Biology Revision Series | aleveler.com
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