📚 Year 7 WJEC Geography: Core Knowledge Essentials | Year 7 WJEC 地理：核心知识点梳理
Welcome to your Year 7 WJEC Geography knowledge organiser. This guide distils the fundamental topics you will encounter: map skills, settlement patterns, river and coastal processes, weather and climate, population dynamics, ecosystems and fieldwork techniques. By linking concepts to real examples from Wales and beyond, you will build a solid foundation for Key Stage 3 and future GCSE studies.
欢迎阅读 Year 7 WJEC 地理核心知识梳理。本指南浓缩了你将接触的基础主题：地图技能、聚落模式、河流与海岸作用、天气与气候、人口动态、生态系统和野外调查方法。通过将概念与威尔士及更广地区的真实案例结合，你将为 KS3 及未来的 GCSE 学习打下坚实基础。
1. Map Symbols and Grid References | 地图符号与网格参考
Ordnance Survey (OS) maps use a standard set of symbols to represent human and physical features. Blue shows water bodies, green indicates woodland, and black lines mark roads and footpaths. Specific symbols, such as a crossed sword for a battle site or a tent for a campsite, help users interpret the landscape without needing written labels.
英国地形测量局 (OS) 地图使用一套标准符号来表示人文与自然要素。蓝色表示水体，绿色标示林地，黑色线条代表道路和人行道。特定符号，如交叉双剑表示古战场、帐篷表示露营地，帮助使用者无需文字标签即可解读地貌。
Grid references allow precise location finding. A four‑figure grid reference (e.g. 1845) identifies the southwestern corner of a 1 km × 1 km square. To give it, go ‘along the corridor’ (eastings) first, then ‘up the stairs’ (northings). For greater accuracy, a six‑figure grid reference (e.g. 183456) divides the square into tenths, pinpointing a location to 100 m.
网格参考系统可以精确定位。四位数网格参考（如 1845）确定一个 1 km × 1 km 方格的西南角。读取方法是先读东距坐标（沿走廊走），再读北距坐标（上楼梯）。为了更精确，六位数网格参考（如 183456）将方格细分为十分之一格，能将位置精确到 100 m。
| Reference Type 参考类型 | Accuracy 精度 | Example 示例 |
|---|---|---|
| Four‑figure 四位数 | 1 km square 方格 | 1845 |
| Six‑figure 六位数 | 100 m square 方格 | 183456 |
2. Scale, Distance and Direction | 比例尺、距离与方向
Scale expresses the ratio between a distance on a map and the corresponding distance on the ground. On a 1:25 000 map, 1 cm represents 25 000 cm (250 m) in reality. A 1:50 000 map means 1 cm equals 500 m. Knowing the scale lets you measure straight‑line distances using a ruler and then convert using the scale factor.
比例尺表示地图上的距离与实地水平距离的比值。在 1:25 000 地图上，1 cm 代表实地 25 000 cm（250 m）。1:50 000 地图则意味着 1 cm 等于 500 m。了解比例尺后，你可以用直尺量算直线距离，再利用比例尺系数进行换算。
Ground distance = Map distance × Scale factor
实地距离 = 图距 × 比例尺因子
Direction is indicated using compass points. The four cardinal points are north (N), south (S), east (E) and west (W). More precise work uses the 16‑point compass, where directions like north‑north‑east (NNE) and south‑south‑west (SSW) appear. Always state the direction from one place to another accurately.
方向用罗盘方位表示。四个基本方位是北 (N)、南 (S)、东 (E)、西 (W)。更精确的定位会用到十六方位罗盘，其中会出现东北偏北 (NNE)、西南偏南 (SSW) 等方位。务必准确表述从一个地点到另一个地点的方向。
3. Relief and Contour Lines | 地形与等高线
Relief describes the shape and height of the land. On OS maps, relief is shown primarily by brown contour lines. Each contour joins points of equal height above sea level. The vertical interval (difference in height between contour lines) is usually 5 m or 10 m on a 1:25 000 map. Closely spaced contours indicate a steep slope; widely spaced contours show a gentle slope or flat land.
地形描述的是地表的形状与高度。在 OS 地图上，地形主要通过棕色等高线来表示。每条等高线连接的是海拔高度相等的点。在 1:25 000 地图上，等高距（相邻等高线高度差）通常为 5 m 或 10 m。等高线密集表示陡坡；等高线稀疏则表示缓坡或平坦地。
Cross‑sections can be drawn to visualise the land profile along a chosen line. By plotting contour values against distance on graph paper, you can see whether a route goes over a hill or through a valley. Additional clues come from spot heights (e.g. •Δ 345) and layer colours: orange/brown for high ground, green for lowland.
你可以绘制地形剖面图来直观展示一条选定路线上的地面起伏。通过在坐标纸上标注等高线高度与距离的关系，你能看出路线是翻过山丘还是穿过谷地。补充线索包括高程点（如 •Δ 345）和分层设色：橙/棕色代表高地，绿色代表低地。
4. Settlement Types and Hierarchy | 聚落类型与等级
A settlement is a place where people live. Settlements range from an isolated dwelling or hamlet to a village, town or city. Their size, services and sphere of influence form a hierarchy. A hamlet might have only a few houses, whereas a city offers hospitals, universities and large shopping centres, serving a wide region.
聚落是人们居住的地方。聚落规模从孤立房屋或小村庄，到村庄、城镇或城市不等。它们的规模、服务数量和影响范围构成了一个等级体系。一个小村庄可能只有几户人家，而城市则提供医院、大学和大型购物中心，服务于更广阔的区域。
Settlement patterns can be nucleated (buildings clustered around a central point), linear (strung along a road or river) or dispersed (scattered individually). Site factors describe the actual ground a settlement is built on (flat land, dry point, crossing point), while situation refers to its relationship with the surrounding area, such as proximity to resources or transport routes.
聚落形态可分为团聚型（建筑物围绕中心点聚集）、线性型（沿道路或河流带状分布）或分散型（房屋零星分布）。选址因素描述聚落实际建基处的地面特征（平坦地、干燥点、渡口），而区位则指其与周边区域的关系，例如靠近资源或交通线路的程度。
5. River Processes and Landforms | 河流作用与地貌
Rivers shape the landscape through erosion, transportation and deposition. The four erosion processes are hydraulic action (force of water), abrasion (rocks scraping the bed), attrition (rocks colliding and smoothing) and solution (dissolving minerals). Transported material, or load, moves by traction, saltation, suspension and solution.
河流通过侵蚀、搬运和沉积作用改造地表。四种侵蚀作用分别是水力侵蚀（水的冲击力）、磨蚀（岩屑刮挖河床）、磨圆（岩屑相互碰撞磨圆）和溶蚀（溶解矿物质）。被搬运的泥沙，即载荷，通过拖曳、跃移、悬移和溶解质四种方式移动。
In the upper course, the river has high energy due to steep gradients, carving V‑shaped valleys, interlocking spurs, rapids and waterfalls. A waterfall forms where a band of hard rock lies over soft rock; the soft rock is eroded more quickly, creating a plunge pool beneath. As the river meanders across flatter land in the middle and lower courses, it creates meanders, oxbow lakes, flood plains and levees.
在上游，由于坡降陡峭能量高，河流切割出 V 形谷、交错山脉、急流和瀑布。当软硬岩层相间出现，硬岩在上、软岩在下时，软岩被较快侵蚀，形成瀑下深潭，便产生了瀑布。在中下游，河流在较平缓的土地上蜿蜒流动，发育出曲流、牛轭湖、泛滥平原和天然堤。
6. Coastal Processes and Features | 海岸作用与特征
Coasts are constantly reshaped by constructive and destructive waves. Constructive waves have a strong swash and weak backwash, building up beaches. Destructive waves have a stronger backwash, pulling sediment out to sea and causing erosion. Coastal erosion includes the same four processes as rivers, plus wave pounding and corrosion.
海岸在建设性波浪和破坏性波浪的持续作用下不断被重塑。建设性波浪具有强大的进流和弱退流，会加积海滩。破坏性波浪的退流更强，会将沉积物拉向大海，引起侵蚀。海岸侵蚀除与河流相同的四种作用外，还包括浪击和腐蚀。
Erosion creates landforms such as headlands and bays (formed where alternating hard and soft rock outcrop), cliffs, wave‑cut platforms, caves, arches and stacks. Depositional features include beaches, spits and bars. Longshore drift moves sediment along the coast in a zig‑zag pattern, driven by waves approaching at an angle. The Welsh coastline, from the Glamorgan Heritage Coast to the Gower Peninsula, displays excellent examples of these features.
侵蚀作用形成岬角与海湾（软硬岩层交替时产生）、海蚀崖、波蚀平台、海蚀洞、海蚀拱和海蚀柱等地貌。堆积地貌包括海滩、沙嘴和沙坝。在沿岸漂移作用下，沉积物以锯齿状路径沿海岸迁移，这是由波浪斜向入射驱动的。威尔士海岸线，从格拉摩根遗产海岸到高尔半岛，都是这些地貌的良好实例。
7. Weather and Climate Factors | 天气与气候因素
Weather is the day‑to‑day condition of the atmosphere (temperature, precipitation, wind, cloud cover), while climate is the average weather over at least 30 years. Key factors affecting the UK’s climate include latitude, altitude, distance from the sea (continentality), prevailing wind and ocean currents. The North Atlantic Drift, a warm ocean current, keeps western coastal areas of Wales milder in winter.
天气是大气每日状况（温度、降水、风、云量），而气候则是至少 30 年的平均天气。影响英国气候的主要因素包括纬度、海拔、距海远近（大陆度）、盛行风和洋流。北大西洋暖流作为一支温暖洋流，使威尔士西部沿海地区冬季较为温和。
Rainfall types in the UK include relief (orographic) rainfall, frontal rainfall and convectional rainfall. Relief rainfall occurs when moist air is forced to rise over high ground, cooling and condensing. The windward side of mountains, such as the Cambrian Mountains, receives heavy rain, while the leeward side experiences a rain shadow, leading to drier conditions.
英国的降水类型包括地形雨、锋面雨和对流雨。地形雨发生在湿润空气被迫抬升越过高地时，因冷却凝结而形成。山脉的迎风坡（如坎布里安山脉）会降下大量雨水，而背风坡则处于雨影区，导致降水偏少。
8. Population Distribution and Migration | 人口分布与迁移
Population distribution describes where people live. Places are densely populated if many people live there, or sparsely populated if few people do. Reasons for dense populations include flat, fertile land, a mild climate, good water supply and economic opportunities (jobs). Sparsely populated areas are often too hot, too cold, too dry, mountainous or have poor soil.
人口分布描述人们居住在何处。如果某地居住的人多，则人口密集；反之则人口稀疏。形成密集人口的原因包括平坦肥沃的土地、温和的气候、充足的水源供应和经济机会（就业）。人口稀疏的地区往往过冷、过热、过干、多山或土壤贫瘠。
Migration is the movement of people from one place to another. Push factors drive people away (e.g. conflict, natural disasters, unemployment). Pull factors attract people to a new area (e.g. better jobs, safety, education). Rural‑to‑urban migration in many countries is fuelled by the perception of better lives in cities, though it can lead to overcrowding in mega‑cities.
迁移是指人们从一个地方移居到另一个地方。推力因素促使人们离开（如冲突、自然灾害、失业）；拉力因素把人们吸引到新地方（如更好的工作、安全、教育）。许多国家出现的乡村向城市迁移现象，正是受城市生活更美好的观念驱动，但它也可能导致特大城市的过度拥挤。
9. Ecosystems and Environmental Issues | 生态系统与环境问题
An ecosystem is a community of living organisms interacting with each other and their non‑living environment. Key components include producers (plants), consumers (animals) and decomposers (bacteria, fungi). Nutrients are recycled within the system. Large‑scale ecosystems or biomes include tropical rainforests, deserts, tundra and temperate deciduous woodlands, such as those found across Wales.
生态系统是由生物群落及其非生物环境相互作用构成的整体。关键组成部分包括生产者（植物）、消费者（动物）和分解者（细菌、真菌）。养分在系统内循环。大尺度生态系统即生物群系，包括热带雨林、荒漠、冻原和落叶阔叶林；威尔士分布落叶阔叶林。
Tropical rainforests, located near the equator, are hot and wet all year, supporting immense biodiversity. Human activities such as deforestation, mining and agriculture are destroying these environments, contributing to climate change and loss of species. Polluting our atmosphere and rivers is a local to global concern, reminding us that all environments are interconnected.
热带雨林分布在赤道附近，终年炎热潮湿，孕育着极丰富的生物多样性。砍伐森林、采矿和农业等人类活动正在毁灭这些环境，加剧气候变化和物种流失。从空气污染到河流污染，这些既是地方性也是全球性的问题，提醒我们各个环境系统相互依存。
10. Fieldwork Skills and Case Studies | 实地考察技能与案例研究
Geographical fieldwork involves enquiry, data collection, presentation, analysis and evaluation. In Year 7, you may investigate river channel changes, traffic counts or environmental quality surveys in your local area. Primary data is collected first‑hand (measurements, questionnaires), while secondary data uses existing sources (maps, census statistics).
地理实地考察包括探究、数据收集、呈现、分析与评价。在 Year 7，你可能会调查河道变化、车流量统计，或在你所在地进行环境质量调查。一手数据是亲自收集的（测量、问卷调查），二手数据则来自已有资料（地图、人口普查统计）。
Presenting data clearly is essential. Bar charts, line graphs, pie charts and annotated field sketches help reveal patterns. For example, plotting river depth against distance downstream might show an increase due to tributaries joining. Case studies, such as the impact of a flood event on the River Severn near Shrewsbury, help you apply theory to real‑world situations and are a key skill in WJEC assessments.
清晰呈现数据至关重要。柱状图、折线图、饼图和带有标注的实地素描都有助于揭示分布规律。例如，将河流深度与沿程距离绘在一张图上，或许能看出因支流汇入而造成深度增加。案例分析，譬如塞文河什鲁斯伯里附近一次洪水事件的影响，能帮助你运用理论解决现实问题，这也是 WJEC 评估的关键技能。
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