📚 Year 7 OCR Science: Summer Bridging Course | Year 7 OCR 科学：暑期预习与衔接课程
Welcome to your Year 7 OCR Science summer bridging course! Moving up to secondary school means science becomes more exciting, with dedicated lessons in biology, chemistry, and physics. This bridging resource will introduce you to the key concepts and skills you will develop in Year 7, following the OCR KS3 Science programme. Whether you are reviewing or getting ahead, this guide will build your confidence for the autumn term.
欢迎来到 Year 7 OCR 科学暑期衔接课程！进入中学，科学课将变得更加精彩，你将分别学习生物、化学和物理。本衔接资源将向你介绍 Year 7 OCR KS3 科学课程中的关键概念和技能。无论你是复习还是提前学习，本指南都将帮助你为秋季学期建立信心。
1. The Nature of Science & Enquiry Skills | 科学的本质与探究技能
Science is not just a collection of facts; it is a process of discovering how the world works through observation, questioning, and experimentation.
科学不仅仅是一堆事实；它是一个通过观察、提问和实验来发现世界如何运作的过程。
In Year 7, you will learn to plan investigations, identify variables (independent, dependent, control), and record data systematically.
在七年级，你将学习计划调查、识别变量（自变量、因变量、控制变量），并系统地记录数据。
A key part of OCR Science is ‘Working Scientifically’, which develops your ability to think like a scientist and evaluate evidence.
OCR 科学的一个重要部分是“科学工作”，它培养你像科学家一样思考和评估证据的能力。
You will also practise using scientific equipment such as thermometers, stopwatches, and measuring cylinders, and learn to present results in tables and graphs.
你还将练习使用温度计、秒表、量筒等科学仪器，并学会用表格和图表展示结果。
2. Lab Safety and Hazard Symbols | 实验室安全与危险标志
Before you carry out any practical work, understanding lab safety rules is essential to protect yourself and others.
在进行任何实验之前，了解实验室安全规则对于保护自己和他人至关重要。
You will learn to recognise common hazard symbols such as flammable, corrosive, toxic, and irritant, and know what precautions to take.
你将学会识别常见危险标志，如易燃、腐蚀性、有毒和刺激性，并知道采取哪些预防措施。
Always listen to your teacher, tie back long hair, wear safety goggles, and never taste or smell chemicals directly.
务必听从老师指示，束好长发，佩戴护目镜，切勿直接品尝或闻化学药品。
In an emergency, know where the fire extinguisher, fire blanket, and eyewash station are located.
紧急情况下，要知道灭火器、灭火毯和洗眼器的位置。
3. Biology: Characteristics of Life & Cells | 生物：生命特征与细胞
All living organisms share certain characteristics, often remembered by the acronym MRS GREN: Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, and Nutrition.
所有生物体都具有某些共同特征，常通过首字母缩写 MRS GREN 来记忆：运动、呼吸、感应、生长、繁殖、排泄和营养。
The cell is the basic building block of life. You will study animal and plant cells, and learn how to use a microscope to observe them.
细胞是生命的基本构建单位。你将学习动物和植物细胞，并学习如何使用显微镜观察它们。
| Organelle | Animal Cell | Plant Cell |
|---|---|---|
| Nucleus | Yes | Yes |
| Cytoplasm | Yes | Yes |
| Cell membrane | Yes | Yes |
| Cell wall | No | Yes |
| Chloroplasts | No | Yes |
| Vacuole | Small/temporary | Large permanent |
Plant cells have a rigid cell wall and chloroplasts for photosynthesis, while animal cells lack these structures. The large permanent vacuole in plant cells helps maintain turgor pressure.
植物细胞有坚硬的细胞壁和用于光合作用的叶绿体，而动物细胞没有这些结构。植物细胞中的大型中央液泡有助于维持膨压。
4. Human Body Systems – An Overview | 人体系统概述
In Year 7, you will discover how the human body is organised into systems that work together to keep you alive.
七年级时，你将发现人体是如何组织成多个系统并协同工作来维持生命的。
Key systems include the digestive system (breaking down food), the circulatory system (transporting oxygen and nutrients), and the respiratory system (gas exchange).
关键系统包括消化系统（分解食物）、循环系统（运输氧气和营养物质）和呼吸系统（气体交换）。
Organs like the heart, lungs, stomach, and intestines each play a specific role, and you will learn how they are adapted to their functions.
心脏、肺、胃和肠等器官各有特定作用，你将了解它们如何适应其功能。
5. Chemistry: States of Matter & the Particle Model | 化学：物质状态与粒子模型
Everything around you is made of matter, which exists in three main states: solid, liquid, and gas.
你周围的一切都由物质组成，物质以三种主要状态存在：固态、液态和气态。
The particle model helps explain the properties of each state: solids have particles tightly packed in a fixed arrangement, liquids have particles close but moving past each other, and gases have particles far apart and moving rapidly.
粒子模型有助于解释每种状态的性质：固体的粒子紧密排列且在固定位置振动；液体的粒子紧密但可以相互滑动；气体的粒子相距很远并快速运动。
You will also study changes of state, such as melting, freezing, boiling, and condensing, and understand that these are physical changes, not chemical ones.
你还将学习状态变化，如熔化、凝固、沸腾和冷凝，并理解这些是物理变化而非化学变化。
solid ⇌ liquid (melting/freezing) | liquid ⇌ gas (boiling/condensing
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