📚 Year 7 Edexcel Science: A Complete Curriculum Breakdown | Year 7 Edexcel 科学：课程大纲全面解析
Year 7 is a pivotal starting point for secondary science under the Edexcel framework. Students begin to see how Biology, Chemistry, and Physics connect through core ideas and hands-on investigations. This guide walks you through every major topic, the skills developed, and how progress is measured, so you can support learning with confidence.
Year 7 是 Edexcel 中学科学的关键起点。学生开始通过核心概念和动手探究，理解生物、化学和物理是如何相互关联的。本指南将带你梳理每一个主要主题、培养的技能以及学习进展的衡量方式，让你能够自信地支持学习。
1. Course Structure and Key Themes | 课程结构与核心主题
The Edexcel Year 7 science course is organised around three disciplinary pillars – Biology, Chemistry, and Physics – woven together by the thread of ‘Working Scientifically’. Lessons typically alternate between theory and practical work, with topics revisited at increasing depth across Key Stage 3. The curriculum also builds essential mathematical and literacy skills for science.
Edexcel Year 7 科学课程围绕三大支柱——生物、化学和物理——展开，并以“科学实践”为主线贯穿始终。课程通常在理论学习和实验操作之间交替进行，随着关键阶段 3 的深入，主题会被反复触及且深度不断增加。该课程还培养科学所需的数学和读写能力。
2. Biology: Cells and Life Processes | 生物：细胞与生命过程
Students begin by exploring the building blocks of life. They learn to use a light microscope to view plant and animal cells, identifying the nucleus, cytoplasm, cell membrane, and in plant cells, the cell wall, chloroplasts, and permanent vacuole. The seven life processes (MRS GREN: Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, Nutrition) are introduced as the defining features of all living things.
学生从探索生命的基石开始。他们学习使用光学显微镜观察植物和动物细胞，识别细胞核、细胞质、细胞膜，以及植物细胞中的细胞壁、叶绿体和中央大液泡。七大生命过程（运动、呼吸作用、感应、生长、繁殖、排泄、营养）作为所有生物的决定性特征被引入。
- Specialised cells such as red blood cells, sperm cells, and root hair cells show how structure relates to function.
- 特殊细胞如红细胞、精子细胞和根毛细胞展示了结构如何与功能相适应。
- Diffusion is introduced as the movement of particles from high to low concentration, explaining how oxygen enters cells.
- 扩散被引入，解释粒子从高浓度向低浓度的运动，说明氧气如何进入细胞。
3. Biology: Reproduction and Inheritance | 生物：繁殖与遗传
This unit covers human reproductive anatomy, the menstrual cycle, fertilisation, and the development of a foetus. Students also compare sexual and asexual reproduction in plants and animals. In plants, they examine flower structure, pollination, and seed dispersal. Simple inheritance is introduced with the idea that genetic information is carried on genes, and some characteristics are inherited while others are environmental.
本单元涵盖人类生殖解剖结构、月经周期、受精和胎儿发育。学生还会比较动植物的有性繁殖和无性繁殖。在植物方面，他们研究花的结构、传粉和种子传播。简单的遗传学概念被引入，指出遗传信息由基因携带，有些特征是可遗传的，有些则是环境引起的。
DNA → Chromosomes → Genes → Traits
DNA → 染色体 → 基因 → 性状
Key terms like gametes, zygote, and pollination are used, and students begin to draw simple genetic cross diagrams without formal Punnett squares at this stage.
使用配子、受精卵、传粉等关键术语，学生在这一阶段开始绘制简单的遗传杂交图，但尚不涉及正式的旁氏表。
4. Biology: Ecosystems and Feeding Relationships | 生物：生态系统与食物关系
Year 7 students construct food chains and food webs, identifying producers, primary and secondary consumers, predators, and prey. They learn how energy flows through an ecosystem and how pyramids of number represent population counts. The impact of environmental change and bioaccumulation of toxins is discussed, along with the importance of biodiversity and conservation.
Year 7 学生构建食物链和食物网，识别生产者、初级消费者、次级消费者、捕食者和猎物。他们学习能量如何流经生态系统，以及数量金字塔如何表示种群数量。还讨论了环境变化和毒素生物积累的影响，以及生物多样性和保护的重要性。
| Term | Definition | 中文 |
| Producer | Organism that makes its own food (e.g. plant) | 生产者 |
| Consumer | Organism that eats other organisms | 消费者 |
| Decomposer | Breaks down dead material (bacteria, fungi) | 分解者 |
5. Chemistry: Matter, Particles, and Separation | 化学：物质、粒子与分离
Students model the three states of matter in terms of particle arrangement and energy. They describe changes of state – melting, freezing, boiling, condensing, sublimation – and link these to energy transfer. The particle model is then used to explain properties such as why solids have a fixed shape and gases spread out. Separation techniques such as filtration, evaporation, distillation, and chromatography are practised in the lab.
学生用粒子的排列和能量来解释物质的三种状态。他们描述状态变化——熔化、凝固、沸腾、冷凝、升华，并将其与能量传递联系起来。然后利用粒子模型解释性质，例如为什么固体有固定形状而气体会扩散。实验室中练习过滤、蒸发、蒸馏和色谱等分离技术。
- The kinetic particle theory helps explain diffusion and gas pressure.
- 粒子运动理论有助于解释扩散和气体压强。
- When water boils, particles gain energy and overcome attractive forces, becoming a gas.
- 水沸腾时，粒子获得能量，克服吸引力，变成气体。
6. Chemistry: Atoms, Elements, and the Periodic Table | 化学：原子、元素与周期表
Atoms are introduced as the smallest unit of matter, with a simple structure of protons, neutrons, and electrons. The Periodic Table is presented as a catalogue of elements arranged in groups and periods. Students learn the first 20 elements, their symbols, and the difference between atoms, molecules, and compounds. Metals and non-metals are distinguished by their properties, such as conductivity, malleability, and reaction with acids.
原子被介绍为物质的最小单位，具有质子、中子和电子的简单结构。周期表作为元素的目录呈现，按族和周期排列。学生学习前 20 号元素、其符号，以及原子、分子和化合物之间的区别。金属和非金属通过导电性、延展性以及与酸的反应等性质加以区分。
Atoms of the same element have the same number of protons (atomic number).
同一元素的原子具有相同的质子数（原子序数）。
Students begin to write simple chemical formulae (e.g. H₂O, CO₂) and word equations for reactions they see in class.
学生开始书写简单的化学式（如 H₂O、CO₂）和在课堂上见到的反应的文字方程式。
7. Chemistry: Chemical Reactions and Acids | 化学：化学反应与酸
Year 7 learners identify signs of a chemical reaction: colour change, temperature change, gas production, and precipitate formation. They explore the differences between physical and chemical changes. The pH scale is introduced, and students use indicators (litmus, universal indicator) to test household substances. Neutralisation reactions between acids and alkalis are linked to everyday contexts like indigestion remedies and soil treatment.
Year 7 学生识别化学反应的迹象：颜色变化、温度变化、气体生成和沉淀形成。他们探究物理变化和化学变化的区别。引入 pH 标度，学生使用指示剂（石蕊、通用指示剂）测试家用物质。酸和碱之间的中和反应与日常情境相关，如消化不良药物和土壤处理。
- Acid + Alkali → Salt + Water
- 酸 + 碱 → 盐 + 水
- Examples include hydrochloric acid + sodium hydroxide → sodium chloride + water.
- 例子包括盐酸 + 氢氧化钠 → 氯化钠 + 水。
8. Physics: Forces and Their Effects | 物理：力及其效应
Forces are pushes or pulls that can change an object’s speed, direction, or shape. Contact forces (friction, air resistance) and non-contact forces (gravity, magnetism) are compared. Students measure forces in newtons using a spring balance. They investigate the effects of balanced and unbalanced forces, relating these to stationary or moving objects. The concepts of mass, weight, and gravitational field strength are clarified.
力是能改变物体速度、方向或形状的推或拉。比较接触力（摩擦力、空气阻力）和非接触力（重力、磁力）。学生用弹簧秤以牛顿为单位测量力。他们探究平衡力与不平衡力的作用，并将之与静止或运动物体联系起来。质量、重量和重力场强度的概念得到澄清。
Weight (N) = Mass (kg) × Gravitational Field Strength (N/kg)
重量 (N) = 质量 (kg) × 重力场强度 (N/kg)
Practical work often involves measuring the extension of a spring to explore Hooke’s Law qualitatively.
实验工作通常包括测量弹簧的伸长量以定性地探究胡克定律。
9. Physics: Energy Transfers and Waves | 物理：能量传递与波
Energy is introduced as something that is stored and transferred between stores, such as kinetic, thermal, elastic potential, and gravitational potential. Students learn to represent energy transfers using simple diagrams. Waves are studied as movers of energy without transferring matter. Sound and light are explored: sound as a longitudinal wave requiring a medium, and light as a transverse wave that can travel through a vacuum. The key properties of reflection, refraction, and the speed of sound vs. light are investigated.
能量被介绍为一种可储存并在能量库之间传递的量，如动能、热能、弹性势能和重力势能。学生学会用简单的图表表示能量传递。波作为不传递物质的能量载体来学习。探讨声和光：声是需要介质的纵波，光是能在真空中传播的横波。研究反射、折射以及声速与光速的比较等关键性质。
- The ear detects sound; amplitude relates to loudness, frequency to pitch.
- 耳朵探测声音；振幅与响度有关，频率与音调有关。
- Law of reflection: angle of incidence = angle of reflection.
- 反射定律：入射角 = 反射角。
10. Physics: Electricity and Magnetic Fields | 物理：电与磁场
Basic circuit concepts are built from simple series circuits. Students use symbols to draw circuits and measure current with ammeters and voltage with voltmeters. Conductors and insulators are tested, and the concepts of resistance and how current behaves in series circuits are introduced. Magnetism is explored through poles, attraction/repulsion, and the Earth’s magnetic field. Electromagnets are built, and factors affecting their strength (number of coils, current) are investigated.
基本电路概念从简单的串联电路开始构建。学生使用符号绘制电路图，并用安培表测量电流，用伏特表测量电压。测试导体和绝缘体，引入电阻概念以及串联电路中电流的行为。通过磁极、吸引/排斥和地磁场来探究磁性。制作电磁体，并探究影响其强度的因素（线圈匝数、电流大小）。
Current is measured in amperes (A), voltage in volts (V).
电流以安培 (A) 为单位，电压以伏特 (V) 为单位。
Safety rules when handling electrical equipment are emphasised throughout.
始终强调操作电气设备的安全规则。
11. Scientific Enquiry and How to Approach Investigations | 科学探究与研究方法
The ‘Working Scientifically’ strand develops skills such as asking testable questions, planning experiments, identifying variables (independent, dependent, control), and selecting appropriate apparatus. Students learn to draw graphs, interpret data, and spot patterns or anomalies. Emphasis is placed on evaluating methods and suggesting improvements. These skills are assessed both in classwork and in end-of-topic tests.
“科学实践”主线培养的技能包括提出可测试的问题、规划实验、识别变量（自变量、因变量、控制变量）以及选择合适的仪器。学生学习绘制图表、解读数据并发现规律或异常值。重点在于评价方法并提出改进建议。这些技能将在课堂作业和单元结束时测试中进行评估。
- Independent variable: the factor you change.
- 自变量：你改变的因素。
- Dependent variable: the factor you measure.
- 因变量：你测量的因素。
- Control variables: factors kept the same.
- 控制变量：保持不变的因素。
12. Assessment, Tracking, and How to Succeed | 评估、追踪与成功之道
Edexcel Year 7 science typically uses end-of-topic tests, practical write-ups, and occasional project work to gauge progress. Students may receive a working-at-grade descriptor such as Developing, Secure, or Exceeding. Regular self-quizzing, making flashcards for key terms, and explaining concepts aloud are highly effective revision strategies. Parents can support by discussing scientific phenomena in daily life and encouraging the use of BBC Bitesize and other Edexcel-aligned resources.
Edexcel Year 7 科学通常采用单元结束测试、实验报告和偶尔的项目作业来衡量进展。学生可能会收到类似“发展中”、“达标”或“优秀”的学习水平描述。定期自我测验、制作关键术语闪卡以及大声解释概念都是非常有效的复习策略。家长可以通过讨论日常生活中的科学现象并鼓励使用 BBC Bitesize 及其他符合 Edexcel 标准的资源来提供支持。
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