📚 Year 11 OCR Geography: Core Knowledge Review | 核心知识点梳理
As you approach your final GCSE year, a structured recap of OCR Geography's most important topics will sharpen your understanding and exam technique. This review connects physical processes, human patterns and key case studies, helping you link concepts across the syllabus and build confidence for both Paper 1 (Our Natural World) and Paper 2 (People and Society).
在你迎来 GCSE 最后一年的学习时，系统梳理 OCR 地理最重要的主题将加深理解并提升应考技巧。这份复习串联自然过程、人文模式与核心案例，帮助你建立跨板块的概念联系，为 Paper 1（我们的自然世界）和 Paper 2（人与社会）做好充分准备。
1. Global Hazards | 全球灾害
A natural hazard is an extreme natural event that threatens human life, property or livelihoods. The same event in an uninhabited area is simply a natural phenomenon.
自然灾害是指对人类生命、财产或生计构成威胁的极端自然事件。若发生在无人区，同样的事件仅仅是自然现象。
Tectonic hazards arise from movement of the Earth's crust along plate boundaries: constructive (tensional), destructive (compressional), conservative (strike-slip) and collision zones. Each produces characteristic earthquake and volcanic patterns.
构造灾害源于地壳沿板块边界的运动：建设性（拉张）、破坏性（挤压）、守恒性（走滑）和碰撞带，各自形成特定的地震与火山分布。
The global atmospheric circulation system drives climatic hazards such as tropical storms. Warm air rises at the equator (low pressure), moves poleward, cools and sinks at about 30° latitude (high pressure), creating the Hadley cell. Those pressure belts determine where storms develop.
全球大气环流系统驱动着热带风暴等气候灾害。暖空气在赤道上升（低压），向极地移动，冷却后在约 30° 纬度下沉（高压），形成哈得莱环流。这些气压带决定了风暴的生成区域。
| Hazard Type | Primary Effects | Short-term Responses |
| Earthquake (LIC) | Building collapse, high death toll | Search and rescue, aid dependency |
| Tropical Storm (HIC) | Flooding, wind damage | Rapid evacuation, insurance relief |
灾害类型 | 主要影响 | 短期应对
地震（低收入国家） | 建筑倒塌、高死亡人数 | 搜救、依赖外援
热带风暴（高收入国家） | 洪水、风害 | 快速疏散、保险救济
2. Climate Change | 气候变化
The Earth's climate has varied naturally over millennia due to Milankovitch cycles (changes in orbit, tilt and precession), volcanic eruptions and solar output variations. However, the rapid warming since the 1950s is overwhelmingly driven by human activity.
地球气候在数千年间因米兰科维奇旋回（轨道、倾角和岁差变化）、火山喷发和太阳辐射变化而自然波动。然而，1950 年代以来的快速变暖主要由人类活动驱动。
The enhanced greenhouse effect occurs when increased emissions of carbon dioxide (CO₂) and methane (CH₄) from burning fossil fuels, agriculture and deforestation trap more longwave radiation in the atmosphere, raising global temperatures.
增强温室效应指因化石燃料燃烧、农业和森林砍伐导致二氧化碳（CO₂）和甲烷（CH₄）排放增加，更多长波辐射被截留在大气中，抬升全球温度。
Evidence of change includes: retreat of glaciers worldwide, rising sea levels (approx. 3.3 mm/year), earlier seasonal events (phenology shifts) and more frequent extreme weather. Ice cores provide proxy data going back 800,000 years, showing CO₂ levels now exceed 420 ppm compared to a pre-industrial 280 ppm.
变化证据包括：全球冰川退缩，海平面上升（约 3.3 毫米/年），季节性事件提前（物候变化），极端天气更频繁。冰芯提供追溯 80 万年的代用数据，显示目前 CO₂ 浓度超过 420 ppm，而工业化前为 280 ppm。
3. Development Dynamics | 发展动态
Development is measured not just by GDP per capita, but by composite indices such as the Human Development Index (HDI), which combines life expectancy, education and income. This gives a broader picture of human well-being.
衡量发展不仅用人均 GDP，还用人类发展指数（HDI）等综合指标，它融合预期寿命、教育和收入，更全面地反映人类福祉。
Rostow's modernisation theory suggests all countries pass through five linear stages, from traditional society to high mass consumption. It has been criticised for being Eurocentric and ignoring historical constraints such as colonialism.
罗斯托的现代化理论认为所有国家都会经历五个线性阶段，从传统社会到高消费时代。批评者认为该理论以欧洲为中心，忽略了殖民主义等历史制约。
Frank's dependency theory argues that the core (developed countries) keeps the periphery (developing countries) in a state of underdevelopment through unequal trade and investment relations. This explains why some nations stay locked into commodity exports.
弗兰克的依附理论指出，核心国家（发达国家）通过不平等的贸易与投资关系，使外围国家（发展中国家）始终处于欠发达状态，这解释了为何一些国家被锁定在初级商品出口中。
Contrasting case study: Nepal (LIC) – relies on remittances and agriculture, with low industrialisation. UK (HIC) – service-dominated economy with high innovation. The gap widens through globalisation benefits.
对比案例：尼泊尔（低收入国家）依赖汇款和农业，工业化程度低；英国（高收入国家）以服务业为主导，创新能力强。全球化红利使差距拉大。
4. Urban Futures | 城市未来
Urbanisation is the increasing proportion of people living in towns and cities. Globally, more than 55% of the population now resides in urban areas, rising fastest in LICs and NEEs.
城市化指城镇人口占比不断上升的过程。目前全球超过 55% 的人口居住在城市地区，低收入国家和新兴经济体增速最快。
Megacities (over 10 million inhabitants) such as Mumbai and Lagos face challenges: slum growth, pressure on infrastructure, traffic congestion and environmental degradation. Yet they also offer economic dynamism and cultural innovation.
孟买、拉各斯等超大城市（人口超 1000 万）面临贫民窟扩张、基础设施压力、交通堵塞和环境退化等挑战，但也提供经济活力与文化创新。
Sustainable urban development requires integrated strategies: rapid transit systems, green building codes, brownfield regeneration and participatory governance. Curitiba in Brazil is a model for Bus Rapid Transit and green space integration.
可持续城市发展需要综合策略：快速公交系统、绿色建筑标准、棕地再开发以及参与式治理。巴西库里蒂巴是快速公交与绿地结合的典范。
5. Distinctive Landscapes in the UK | 英国独特景观
The UK's physical landscapes are shaped by geology, rock type, past glacial and fluvial processes. Upland areas like the Scottish Highlands are dominated by resistant igneous and metamorphic rocks, whereas lowland England features softer sedimentary rocks creating rolling hills.
英国的物理景观由地质、岩石类型、古冰川和河流作用塑造。苏格兰高地等高原区以坚硬的火成岩和变质岩为主，而英格兰低地多分布松软的沉积岩，形成起伏的丘陵。
Granite tors on Dartmoor are remnants of a former overlying rock layer removed by chemical weathering; freeze-thaw weathering has further sculpted the exposed batholith. Limestone pavements in the Yorkshire Dales show clints, grykes and swallow holes due to carbonation.
达特姆尔的花岗岩石墩是上覆岩层被化学风化剥蚀后的残留，冻融作用进一步雕刻了出露的岩基；约克郡谷地的石灰岩路面因碳酸化作用而呈现岩块、溶沟和落水洞。
Glaciation has left profound legacies: U-shaped valleys, corries, arêtes and ribbon lakes in the Lake District. Post-glacial rivers continue to rework these landscapes through erosion and deposition.
冰川作用留下深刻印记：湖区可见 U 形谷、冰斗、刃脊和带状湖。后冰川时期的河流通过侵蚀和沉积持续重塑这些景观。
6. Coasts | 海岸
Coastal systems are dynamic, driven by wave energy, tides and currents. Constructive waves build up beaches with low frequency (6-8 per minute) and strong swash, while destructive waves erode coastlines with high frequency (10-14 per minute) and strong backwash.
海岸系统受波浪能量、潮汐和海流驱动，始终处于变化中。建设性波浪频率低（每分钟 6-8 次），上冲强，堆积海滩；破坏性波浪频率高（每分钟 10-14 次），回流强，侵蚀海岸。
Processes of erosion: hydraulic action, abrasion (corrasion), attrition and solution (corrosion). Sub-aerial processes like weathering and mass movement also weaken cliffs, leading to slumping and landslides.
侵蚀过程包括：水力作用、磨蚀、磨圆和溶蚀。风化、块体运动等陆上过程也会削弱悬崖，导致崩塌和滑坡。
Coastal landforms: headlands and bays form along discordant coastlines; caves, arches, stacks and stumps are progressive erosional features. Deposition creates beaches, spits and bars. Longshore drift moves sediment along the shore.
海岸地貌：在岩性不一致的海岸形成岬角和海湾；海蚀洞、海蚀拱、海蚀柱和海蚀残丘是演替性侵蚀形态；沉积形成海滩、沙嘴和堰洲坝。沿岸漂移搬运近岸沉积物。
7. Rivers | 河流
River landscapes change from source to mouth. The Bradshaw model shows how discharge, velocity and sediment size vary downstream: channel width and depth increase, bedload size decreases as attrition rounds particles.
河流景观从源头到河口不断变化。布拉德肖模型展示流量、流速和沉积物粒径在下游的变化：河道变宽变深，因磨圆作用推移质粒径变小。
Erosional landforms in the upper course include V-shaped valleys, interlocking spurs, waterfalls and gorges. Waterfalls retreat when resistant cap rock is undercut, forming a plunge pool.
上游的侵蚀地貌包括 V 形谷、交错山嘴、瀑布和峡谷。当坚硬盖层被掏蚀后，瀑布后退并形成淘蚀潭。
In the middle and lower courses, meanders migrate, oxbow lakes are cut off, and floodplains develop. Levees build up from repeated silt deposition during floods. Deltas form where the river meets the sea and velocity drops.
中下游的曲流摆动、牛轭湖截弯取直，冲积平原发育。洪水反复沉积粉砂形成天然堤。河流入海处流速降低，形成三角洲。
Hydrographs plot discharge over time. Peak discharge, lag time and rising / falling limbs reveal catchment characteristic. Urbanisation shortens lag time and increases flood risk.
过程线记录流量随时间变化。洪峰流量、滞时和涨水/退水段可反映流域特征。城市化缩短滞时并提高洪涝风险。
8. Sustaining Ecosystems | 维持生态系统
An ecosystem comprises biotic (living) and abiotic (non-living) components interacting through energy flows and nutrient cycles. Tropical rainforests, deciduous woodlands and polar biomes each have distinct structures and adaptations.
生态系统由生物（生命）和非生物（非生命）组分构成，通过能量流动和养分循环相互作用。热带雨林、落叶林和极地生物群系具有各自独特的结构与适应性。
Tropical rainforests: high biodiversity, nutrient-poor soils (latosols) due to rapid decomposition, buttress roots and drip-tips. The nutrient cycle is tight, with most nutrients stored in the biomass. Deforestation disrupts this, causing soil erosion and biodiversity loss.
热带雨林：生物多样性极高，土壤因快速分解而贫瘠（砖红壤），可见板根和滴水叶尖。养分循环紧凑，大多储存于生物量中。森林砍伐打破平衡，导致土壤侵蚀和生物多样性丧失。
Small-scale sustainable management includes agroforestry, community-managed reserves and ecotourism. For instance, in the Amazon's Mamirauá Reserve, locals manage fishing and logging quotas, easing pressure on the ecosystem.
小规模可持续管理包括农林复合、社区管理保护区和生态旅游。例如，亚马逊马米拉瓦保护区的居民管理渔业与伐木配额，减轻对生态系统的压力。
9. Resource Reliance | 资源依赖
Food, energy and water resources are fundamental to human development. The UK's food supply is increasingly globalised, making it vulnerable to 'food miles' and supply shocks; seasonal food and organic farming offer more sustainable options.
粮食、能源和水资源是人类发展的基石。英国的食品供应日益全球化，对“食物里程”和供应冲击更为脆弱；时令食品和有机农业提供了更可持续的选择。
Energy security depends on diversification and reducing dependence on fossil fuels. The UK's energy mix has shifted from coal to renewables and nuclear, but still relies on imports. Hydraulic fracturing (fracking) for shale gas is controversial due to environmental risks.
能源安全有赖于多元化并减少对化石燃料的依赖。英国的能源结构已从煤炭转向可再生能源和核能，但仍依赖进口。页岩气水力压裂因环境风险而备受争议。
Water stress arises where demand exceeds supply. Physical scarcity and economic scarcity differ; the latter occurs when lack of infrastructure limits access. Large-scale solutions (reservoirs, desalination) and local approaches (rainwater harvesting, drip irrigation) each have merits.
水资源压力出现在需求超过供给时。物理性短缺和经济性短缺不同，后者因缺乏基础设施而限制取水。大型方案（水库、海水淡化）和本地方法（雨水收集、滴灌）各有优点。
10. Exam Skills and Case Study Mastery | 考试技巧与案例精通
In OCR Geography, command words decide your answer depth. 'Describe' needs straightforward recounting of facts from a resource; 'Explain' requires reasons and processes; 'Evaluate' demands a balanced argument with a justified conclusion.
OCR 地理考试中，指令词决定答案深度。“描述”需要直接陈述资料中的事实；“解释”需要给出原因和过程；“评价”要求平衡论证并给出有依据的结论。
Case studies must be specific, with precise locations, dates and data. For tectonic hazards, be ready to compare an HIC (e.g. 2011 Tohoku, Japan) and an LIC event (e.g. 2015 Gorkha, Nepal) in terms of effects and responses, highlighting contrasting vulnerability.
案例研究必须具体，包含准确地点、日期和数据。遇到构造灾害题目，要能对比高收入国家（如 2011 日本东北地震）和低收入国家（如 2015 尼泊尔廓尔喀地震）的影响与应对，突出不同的脆弱性。
Always annotate diagrams – field sketches, storm hydrographs or plate boundary cross‑sections – with clear labels. In 6‑mark and 8‑mark questions, structure your answer with a short introductory sentence, well‑developed points and a final summative statement.
始终为示意图加注——实地草图、风暴过程线或板块边界剖面——并清晰标注。在 6 分和 8 分题中，用简短引入句、充分展开的论点和最后的总结陈述来组织答案。
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