📚 Year 7 WJEC Biology: A Parent's Guide to Supporting Learning | WJEC 七年级生物：家长辅导指南
As your child begins Year 7, they encounter a more structured approach to science, including biology. The WJEC curriculum introduces fundamental concepts about living organisms, their interactions, and how their bodies work. This guide is designed to help you understand the key topics and how you can support your child's learning at home, even if you have not studied biology yourself for many years.
当您的孩子进入七年级，他们会以更系统的方式学习科学，包括生物学。WJEC 课程介绍了有关生物体、它们的相互作用以及身体如何运作的基本概念。本指南旨在帮助您理解关键主题，以及如何在家支持孩子的学习，即使您自己已经多年没有接触生物学。
1. Welcome to KS3 Biology (WJEC) | 欢迎学习 KS3 生物（WJEC）
Year 7 marks the start of Key Stage 3, where biology becomes a distinct subject within science. The WJEC specification encourages hands-on enquiry, observation and drawing conclusions. Parents do not need to be experts; showing interest and asking your child to explain what they learned can boost their confidence and understanding.
七年级标志着 KS3 阶段的开始，生物成为科学中一门独立的学科。WJEC 大纲鼓励动手探究、观察和得出结论。家长无需成为专家；表现出兴趣并让孩子解释他们学到的东西，就能增强他们的信心和理解力。
Topics covered typically include cells, body systems, reproduction, ecology and photosynthesis. These build a foundation for GCSE and everyday life. Encouraging your child to link what they study to the natural world around them makes biology far more memorable.
通常涵盖的主题包括细胞、身体系统、生殖、生态和光合作用。这些为 GCSE 和日常生活奠定基础。鼓励孩子将所学内容与身边的自然世界联系起来，会让他们对生物留下更深刻的印象。
2. Cells – The Basics of Life | 细胞——生命的基本单位
All living organisms are made of cells. Animal cells contain a nucleus, cytoplasm and cell membrane, while plant cells also have a rigid cell wall, a large permanent vacuole and chloroplasts for photosynthesis. Understanding these differences is a core Year 7 skill.
所有生物体都由细胞构成。动物细胞含有细胞核、细胞质和细胞膜，而植物细胞还有坚硬的细胞壁、一个大的中央液泡以及用于光合作用的叶绿体。理解这些区别是七年级的一项核心技能。
At home, you can help by making a model using a zip-lock bag (cytoplasm), a smaller bag of water (vacuole) and a button (nucleus). Label each part together. This simple activity reinforces vocabulary and 3D thinking.
在家时，您可以用一个密封袋（细胞质）、一个装水的更小的袋子（液泡）和一颗纽扣（细胞核）来制作模型。一起给各部分贴好标签。这个简单的活动能强化词汇和立体思维。
3. Using a Microscope Safely | 安全使用显微镜
Microscopes allow us to see cells and tiny organisms. Your child will learn to carry a microscope with two hands, start on the lowest power objective lens, use the coarse focus knob carefully, and adjust the mirror for light. They will prepare simple slides, such as onion epidermis.
显微镜能帮助我们观察细胞和微小生物。您的孩子将学会用双手搬运显微镜、从最低倍物镜开始、小心使用粗准焦螺旋，并调节反光镜以获得光线。他们还会制作简易装片，比如洋葱表皮装片。
Supervise at home by asking them to explain each step before they touch the equipment, reinforcing safety rules. Even without a microscope, you can use a magnifying glass to examine pond water or leaf surfaces, promoting the same observational skills.
在家指导时，可以让他们在接触设备前先解释每个步骤，以强化安全规则。即使没有显微镜，您也可以使用放大镜观察池塘水或叶片表面，培养同样的观察技能。
4. The Digestive System: From Food to Fuel | 消化系统：从食物到能量
The digestive system breaks down large food molecules into smaller, soluble ones that can be absorbed into the blood. The main organs are the mouth, oesophagus, stomach, small intestine and large intestine. Enzymes play a key role in speeding up digestion without being used up.
消化系统将大块的食物分子分解为可溶于水的小分子，以便被血液吸收。主要器官包括口腔、食道、胃、小肠和大肠。酶在加速消化过程中起着关键作用，且自身不会被消耗。
You can demonstrate the journey of food using a plastic bag (stomach) and tights (intestine), squashing bread with a little water. Ask your child to explain where enzymes might act. This hands-on model makes a complex process tangible and memorable.
您可以用一个塑料袋（胃）和连裤袜（肠）来演示食物的旅程，将面包和少量水一起挤压。问问孩子酶会在哪里发挥作用。这个动手模型让复杂的过程变得具体而难忘。
5. Breathing and Gas Exchange | 呼吸与气体交换
Breathing brings oxygen into the lungs and removes carbon dioxide. The key structures are the trachea, bronchi and alveoli, where gas exchange actually occurs. The diaphragm and rib muscles change the pressure in the chest to make inhalation and exhalation possible.
呼吸将氧气带入肺部并排出二氧化碳。关键结构包括气管、支气管和肺泡，气体交换就发生在肺泡处。膈肌和肋间肌会改变胸腔内的压力，从而实现吸气和呼气。
Build a lung model using a plastic bottle, two balloons (one for the lung, one stretched over the base as a diaphragm) and a Y-shaped tube. Pulling the bottom balloon down shows inhalation, and letting go mimics exhalation. This helps visualise pressure changes.
用一个塑料瓶、两个气球（一个当肺，另一个绷在瓶底当膈肌）和一个 Y 形管来制作肺部模型。向下拉底部气球表示吸气，松手则模拟呼气。这有助于直观感受压力的变化。
6. The Heart and Circulation | 心脏与循环系统
The heart is a muscular pump with four chambers: two atria and two ventricles. It sends deoxygenated blood to the lungs and oxygenated blood to the body. Year 7 pupils also learn about arteries, veins and capillaries, and the components of blood such as red and white cells and platelets.
心脏是一个有四个腔室的肌肉泵：两个心房和两个心室。它将缺氧血送到肺部，将富氧血送往全身。七年级的学生还会学习动脉、静脉和毛细血管，以及血液的组成成分，如红细胞、白细胞和血小板。
Help your child find their pulse at the wrist and count beats per minute before and after exercise. Plot the results on a simple graph. Discuss why the heart rate increases to meet the muscles' demand for oxygen. This links theory with real bodily experience.
帮助孩子在手腕处找到脉搏，分别在运动前后数每分钟的跳动次数。将结果绘制成简单图表。讨论为什么心率会加快以满足肌肉对氧气的需求。这将理论与真实的身体体验联系起来。
7. Plant Nutrition: Photosynthesis | 植物营养：光合作用
hloroplasts containing chlorophyll. The word equation is: carbon dioxide + water → glucose + oxygen (in the presence of light and chlorophyll).
光合作用是绿色植物利用光能，将二氧化碳和水转化为葡萄糖和氧气的过程。它发生在含有叶绿素的叶绿体中。文字方程式为：二氧化碳 + 水 → 葡萄糖 + 氧气（在光和叶绿素的存在下）。
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
You can test a leaf for starch using iodine solution, but a safer home alternative is to discuss why the leaf turns blue-black. Try covering part of a leaf with foil while still on the plant; after a day, the covered part lacks starch, showing the need for light.
您可以用碘液测试叶片中的淀粉，但更安全的家庭替代方式是讨论叶片为什么会变为蓝黑色。尝试在植株上用锡纸覆盖部分叶片；一天后，被覆盖的部分缺乏淀粉，这表明需要光。
8. Food Chains and Ecosystems | 食物链与生态系统
A food chain shows the transfer of energy from one organism to another. Arrows point from the food to the eater. Producers (plants) start the chain, followed by primary consumers (herbivores), secondary consumers and sometimes tertiary consumers. Decomposers break down dead matter.
食物链显示能量从一个生物体转移到另一个生物体。箭头从食物指向捕食者。生产者（植物）处于起点，随后是初级消费者（植食动物）、次级消费者，有时还有三级消费者。分解者则分解死亡的有机物。
Create simple food chain cards with your child using local animals and plants. Rearrange them into a food web to show the complexity of real ecosystems. Ask what would happen if a producer or consumer were removed, reinforcing interdependence.
与孩子一起用身边的动植物制作简单的食物链卡片。将它们重新排列成食物网，以展示真实生态系统的复杂性。提问如果某个生产者或消费者被移除会发生什么，以强化相互依存的概念。
9. Reproduction: How Organisms Continue | 生殖：生物的延续
Reproduction ensures the continuation of species. Year 7 covers plant reproduction, including flower structure (stamen, carpel, petals), pollination and fertilisation, leading to seed and fruit formation. Wind and insect pollination are compared.
生殖确保了物种的延续。七年级涵盖植物生殖，包括花的结构（雄蕊、雌蕊、花瓣）、传粉和受精，最终形成种子和果实。还会比较风媒传粉和虫媒传粉。
Basic human reproduction is introduced, focusing on the male and female reproductive systems and gametes (sperm and egg). This is often a sensitive topic. Parents can support by using correct scientific terms and answering questions honestly, reinforcing that these are normal biological functions.
基础的人类生殖也会介绍，重点在男性和女性生殖系统以及配子（精子和卵细胞）。这通常是一个敏感话题。家长可以通过使用正确的科学术语和诚实地回答问题来给予支持，并让孩子明白这些都是正常的生物学功能。
10. Top Tips for Supporting Your Child's Biology Learning | 辅导孩子学习生物的最佳建议
Encourage curiosity: ask why leaves change colour, how bread rises, or what makes an insect an insect. Regular conversations build scientific thinking. Use kitchen experiments – growing seeds in different conditions, observing yeast activity, or testing foods for fat with brown paper – to bring concepts to life.
鼓励好奇心：问一问为什么叶子会变色、面包如何膨胀，或者是什么让昆虫成为昆虫。经常性的对话能培养科学思维。利用厨房实验——在不同条件下培育种子、观察酵母的活性，或者用牛皮纸测试食物中的脂肪——将概念带入生活。
Create a revision routine: short, 15-minute sessions after school are more effective than last-minute cramming. Mind maps, flashcards and drawing diagrams help visual learners. Online resources, including the WJEC website and carefully chosen videos, can clarify tricky topics. Above all, praise effort, not just correct answers, to build resilience.
建立复习常规：放学后短暂的 15 分钟学习比考前突击更有效。思维导图、抽认卡和画图对视觉型学习者有帮助。包括 WJEC 官网和精心挑选的视频在内的在线资源能阐明难点。最重要的是，表扬努力而不仅仅是正确答案，以培养孩子的韧性。
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