IGCSE CAIE Geography: Core Knowledge Summary | 核心知识点梳理

📚 IGCSE CAIE Geography: Core Knowledge Summary | 核心知识点梳理

This guide provides a structured summary of the key topics in the Cambridge IGCSE Geography (0460) syllabus. It covers map skills, natural environments, and human environments, helping students build a solid foundation for their examinations. Each section is presented with clear explanations in English followed by equivalent explanations in Chinese to support bilingual learners.

本指南系统梳理了剑桥 IGCSE 地理（0460）课程的核心主题，涵盖地图技能、自然环境和人文环境，帮助学生在备考中建立扎实的知识框架。每一部分都以英文讲解在先、中文配对在后的双语形式呈现，便于中英双语学习者对照理解。

1. Map Skills | 地图技能

Grid references are essential for locating features on a topographic map. A four‑figure reference identifies a grid square, while a six‑figure reference pinpoints an exact location within that square. Always remember to read eastings first, then northings.

网格坐标是地形图上定位地物的基础。四位数字坐标指明一个网格方格，六位数字坐标则精确指认方格内的具体位置，读取时始终牢记先读东向坐标，再读北向坐标。

Scale is the relationship between a distance on the map and the corresponding distance on the ground. You can measure straight‑line distances using a ruler and the linear scale, or curved distances with a piece of string. Bearings are measured clockwise from north and are expressed as three‑digit angles.

比例尺表示图上距离与地面实际距离的比例关系。直线距离可用直尺配合线段比例尺测量，曲线距离可用细绳辅助。方位角从正北按顺时针方向量测，用三位数角度表示。

Contour lines connect points of equal height, and their spacing indicates slope steepness. Closely spaced contours mean a steep slope, while widely spaced contours show gentle terrain. Spot heights, triangulation pillars, and bench marks provide exact altitude data.

等高线连接海拔相等的点，其疏密反映坡度陡缓。等高线密集代表陡坡，稀疏则表明地势平缓。高程点、三角点和水准点为精确海拔数据提供参考。

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2. Plate Tectonics and Hazards | 板块构造与灾害

The Earth’s crust is broken into tectonic plates that move on the semi‑molten mantle. Convection currents in the mantle drive this movement. Plate boundaries can be destructive (convergent), constructive (divergent), or conservative (transform). Each boundary type produces distinct landforms and hazards.

地壳被分割成多个在软流层上移动的构造板块，地幔中的对流驱动着板块运动。板块边界分为破坏型（汇聚）、建设型（分离）和保守型（转换）三种，不同类型边界会形成独特的地貌与灾害。

At destructive boundaries, oceanic crust subducts, generating deep ocean trenches and explosive volcanoes. Fold mountains form where two continental plates collide. Constructive boundaries see plates moving apart, creating mid‑ocean ridges and shield volcanoes. Conservative boundaries, where plates slide past each other, produce shallow‑focus earthquakes.

破坏型边界处，大洋地壳俯冲形成深海沟和爆发性火山，两大陆板块碰撞则形成褶皱山脉。建设型边界处板块分离，形成大洋中脊和盾状火山。保守型边界两侧板块水平错动，触发浅源地震。

Earthquakes are measured using the Richter scale (magnitude) and the Mercalli scale (intensity). Volcanoes vary in shape and eruptive style: shield volcanoes emit runny lava and have gentle slopes, while composite volcanoes produce viscous lava, ash, and steep profiles.

地震用里氏震级衡量释放能量，用麦卡利烈度评估地面影响。火山形态与喷发方式多样：盾状火山流出流动性强的熔岩，坡度平缓；复合火山喷发粘稠熔岩和火山灰，剖面陡峭。

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3. River Environments | 河流环境

Rivers shape the landscape through erosion, transportation, and deposition. The four main erosion processes are hydraulic action, abrasion (corrasion), attrition, and solution (corrosion). Transportation occurs in four ways: traction, saltation, suspension, and solution.

河流通过侵蚀、搬运和堆积改变地貌。四种主要侵蚀作用为水力作用、磨蚀、磨损和溶蚀。搬运方式包括推移、跃移、悬移和溶移四种。

In the upper course, steep gradients lead to vertical erosion, producing V‑shaped valleys, interlocking spurs, waterfalls, and gorges. A waterfall forms where a band of hard rock overlays softer rock; undercutting and collapse cause the waterfall to retreat upstream, leaving a gorge.

在上游，陡峭的坡降促使垂直侵蚀，形成V型谷、交错山嘴、瀑布和峡谷。瀑布生成于硬岩层覆盖在软岩层之上，掏蚀和坍塌使瀑布向上游后退，留下峡谷。

In the middle and lower courses, lateral erosion and deposition dominate. Meanders develop due to helicoidal flow; erosion on the outer bend builds a river cliff, while deposition on the inner bend forms a slip‑off slope. Floodplains and levees are created by repeated flooding, and deltas form where river velocity drops at the river mouth.

中下游以侧蚀和沉积为主。螺旋流促使曲流发育，外弯侵蚀形成凹岸陡崖，内弯堆积形成凸岸边滩。反复泛滥形成河漫滩和天然堤，三角洲则发育于流速锐减的河口位置。

The storm hydrograph shows river discharge over time. A short lag time and high peak discharge increase flood risk, influenced by factors such as intense rainfall, impermeable surfaces, steep slopes, and deforestation.

风暴水文过程线显示河流流量随时间的变化。滞后时间短且洪峰流量高会增大洪水风险，强降雨、不透水地面、陡坡和森林砍伐等因素都会加剧这种情况。

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4. Coastal Environments | 海岸环境

Waves are the main agent of coastal change. Constructive waves are low and flat, depositing material to build beaches, while destructive waves are steep and high, eroding coastlines. Sub‑aerial processes such as weathering and mass movement also weaken cliffs.

波浪是海岸变化的主要动力。建设性波浪低平，堆积物质形成海滩；破坏性波浪高陡，侵蚀海岸线。风化、块体运动等陆上过程同样削弱崖壁。

Erosional landforms include headlands and bays, formed where alternating bands of hard and soft rock meet the sea. Further erosion creates caves, arches, stacks, and stumps. Wave‑cut platforms are wide, gently sloping rock surfaces left behind as cliffs retreat.

侵蚀地貌包括由软硬岩层交替出露导致差异侵蚀形成的岬角和海湾。持续的侵蚀产生海蚀洞、海蚀拱、海蚀柱和海蚀残柱。海蚀平台则是悬崖后退留下的宽阔缓坡岩面。

Depositional landforms result from longshore drift and wave transport. Beaches, spits, tombolos, and bars form where sediment is deposited. A spit is a curved sand ridge extending into the sea, often ending in a recurved end. Bars can seal off lagoons to form coastal lakes.

侵蚀沉积地貌由沿岸漂移和波浪搬运形成。海滩、沙嘴、连岛沙洲和沙坝都是沉积物堆积的产物。沙嘴是伸入海中并常有钩状末端的沙脊，沙坝可封闭泻湖形成潟湖。

Coastal management strategies include hard engineering (sea walls, groynes, rock armour) and soft engineering (beach nourishment, managed retreat). Each approach has economic and environmental costs and benefits.

海岸管理策略包括硬工程（海堤、丁坝、抛石护岸）和软工程（海滩补沙、有管理撤退）。每种方法皆有其经济与环境成本及收益。

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5. Weather and Climate | 天气与气候

Weather instruments measure elements such as temperature (thermometer), rainfall (rain gauge), wind speed (anemometer), and wind direction (wind vane). A Stevenson screen houses thermometers to ensure accurate air temperature readings, shielded from direct sunlight and rain.

气象仪器测定各要素：温度用温度计、降水量用量雨筒、风速用风速计、风向用风向标。百叶箱放置温度计，避免阳光直射和雨水影响，以保证准确的空气温度读数。

Three main types of rainfall are convectional, relief (orographic), and frontal (cyclonic). Convectional rainfall occurs when heated ground warms the air above, causing it to rise, cool, and condense. Relief rainfall is forced when moist air is uplifted over high ground. Frontal rainfall happens where warm and cold air masses meet, and the lighter warm air is forced to rise.

三种主要降雨类型为对流雨、地形雨和锋面雨。对流雨因地面受热，上方空气增温上升、冷却凝结而成；地形雨是湿润空气遇高地被迫抬升所致；锋面雨发生于冷暖空气交汇处，较轻的暖空气被迫抬升。

Climate graphs combine monthly temperature and precipitation data. Factors affecting climate include latitude, altitude, distance from the sea, ocean currents, and prevailing winds. The Intertropical Convergence Zone (ITCZ) shifts seasonally, bringing heavy rainfall to equatorial regions and a dry season to the tropics.

气候图表结合月均温度和降水数据。影响气候的因素包括纬度、海拔、距海远近、洋流和盛行风。热带辐合带（ITCZ）季节性移动，为赤道地区带来丰沛降水，给热带区域带来干季。

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6. Ecosystems | 生态系统

An ecosystem is a community of living organisms interacting with their physical environment. Energy flows through food chains and food webs, beginning with producers (plants). Nutrient cycling is shown through the Gersmehl model, where litter, biomass, and soil store nutrients, and transfers occur through decomposition, uptake, and leaching.

生态系统是生物群落与无机环境相互作用的整体。能量沿食物链和食物网流动，起始于生产者（植物）。养分循环可用格斯梅尔模型表示，凋落物、生物量和土壤为养分库，通过分解、吸收和淋溶进行传递。

Tropical rainforests have high temperatures, abundant rainfall, and layered structure (emergent, canopy, understorey, forest floor). Soils are often deep but infertile due to rapid nutrient cycling. Vegetation adaptations include drip tips, buttress roots, and lianas. Deforestation for agriculture, logging, and mining leads to biodiversity loss, soil erosion, and climate change.

热带雨林高温多雨，分层结构包括露生层、树冠层、下木层和林地层。土壤虽深厚，但养分循环极快故而贫瘠。植物适应特征有滴水叶尖、板根和藤本植物。为了农业、伐木和采矿而砍伐森林，导致生物多样性丧失、水土流失和气候变化。

Deserts have very low rainfall, extreme temperatures, and sparse vegetation. Plants, like cacti, store water in fleshy stems and have long roots. Animals are often nocturnal to avoid heat. Fragile desert ecosystems are threatened by overgrazing, salinisation, and tourism.

荒漠降水量极少、温度极端、植被稀疏。仙人掌等植物在肉质茎中储水，根系深长；动物多为夜行性以避高温。脆弱的荒漠生态系统面临过度放牧、盐碱化和旅游的威胁。

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7. Population Dynamics | 人口动态

The world’s population growth rate is determined by the difference between crude birth rate (CBR) and crude death rate (CDR), plus net migration. The formula for natural increase is:

世界人口增长率由粗出生率（CBR）与粗死亡率（CDR）之差再加上净迁移决定。自然增长率的计算公式为：

Rate of Natural Increase (%) = (CBR – CDR) / 10

自然增长率 (%) = (粗出生率 – 粗死亡率) / 10

The Demographic Transition Model (DTM) describes population change over time in five stages. Stage 1 has high fluctuating birth and death rates; Stage 2 sees death rates falling; Stage 3 shows falling birth rates; Stage 4 has low, stable rates; Stage 5 experiences an ageing population with death rates slightly exceeding birth rates. Population pyramids illustrate age‑sex structure and reveal a country’s stage of development.

人口转变模型（DTM）用五个阶段描述人口变化。第一阶段为高出生率与高死亡率波动；第二阶段死亡率开始下降；第三阶段出生率下降；第四阶段低出生率与低死亡率趋于稳定；第五阶段出现老龄化，死亡率略超出生率。人口金字塔展示年龄性别结构，可反映国家的发展阶段。

Overpopulation occurs when resources are insufficient to support the population, leading to pressure on housing, food, and services. Under‑population is when resources exceed population needs, potentially hindering economic development. Migration types include voluntary and forced, and can be internal or international. Push factors drive people away from an area, while pull factors attract them to a new destination.

人口过剩指资源不足以支撑人口规模，造成住房、食物和服务压力。人口不足则是资源超过人口需求，可能阻碍经济发展。迁移类型有自愿迁移与强迫迁移，以及国内迁移和国际迁移。推力因素使人们离开原住地，拉力因素吸引人们前往新目的地。

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8. Settlement and Urbanisation | 聚落与城市化

Settlements can be classified by site, situation, shape, and function. A settlement hierarchy arranges places by size and services: from isolated dwellings and hamlets to villages, towns, and cities. The threshold population is the minimum number of people needed to support a service; the sphere of influence is the area served by a settlement.

聚落可按位置、地形、形状和功能分类。聚落等级体系按规模和功能层次划分：从独立房屋、小村庄，到村庄、镇和城市。门槛人口是维持某种服务最低所需的人口数；辐射范围是聚落服务的区域。

Urban land use in MEDCs is often modelled by the Burgess concentric zone model and the Hoyt sector model. The Central Business District (CBD) is the commercial core; surrounding zones include inner city, inner suburbs, and outer suburbs. In LEDCs, rapid urbanisation produces informal settlements (shanty towns) on the fringes, lacking basic services and secure tenure.

发达国家的城市用地常由伯吉斯同心圆模型和霍伊特扇形模型解释。中央商务区（CBD）是商业核心；向外依次为内城区、近郊和远郊。在发展中国家，快速城市化在边缘地带生成非正规聚落（贫民窟），缺少基本服务和稳定土地使用权。

Urbanisation describes the increasing proportion of people living in towns and cities. Causes include rural‑to‑urban migration and natural increase. Urban problems include congestion, pollution, housing shortages, and strain on infrastructure. Sustainable solutions involve green spaces, public transport, and waste recycling.

城市化指城镇居住人口比例不断上升。原因包括乡城迁移和自然增长。城市问题有交通拥堵、污染、住房短缺和基础设施压力。可持续对策包含绿地建设、公共交通和垃圾回收利用。

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9. Agricultural Systems | 农业系统

All farming systems can be represented as a system with inputs (physical, human, capital), processes (ploughing, sowing, harvesting), and outputs (crops, livestock, waste). Agriculture may be classified as arable (crops), pastoral (animals), or mixed (both). It can be extensive or intensive, and subsistence or commercial.

所有农业系统都可用投入（自然、人文、资本）、过程（犁地、播种、收割）和产出（作物、牲畜、废料）的系统模型表示。农业可分类为种植业（作物）、畜牧业（动物）或混合农业。生产方式有粗放型与集约型之分，目的也可分为自给型与商业型。

Shifting cultivation is a traditional subsistence system in tropical rainforests, where land is cleared, farmed for a short period, and then left fallow to recover fertility. Wet rice cultivation is labour‑intensive, often found on floodplains and terraces in monsoon Asia, relying on controlled flooding and high inputs of labour.

迁移农业是热带雨林地区的传统自给型农业，开垦土地短期耕作后弃耕休养，以恢复地力。水稻种植为劳动密集型，多见于季风亚洲的泛滥平原与梯田，依赖人工控制灌溉与大量劳动力投入。

The Green Revolution introduced high‑yielding varieties (HYVs) of wheat and rice, along with increased use of fertilisers, pesticides, and irrigation. It greatly boosted food production in countries like India and Mexico, but also caused environmental damage and social inequality due to high input costs favouring wealthier farmers.

绿色革命引入了小麦和水稻的高产品种（HYVs），并配合化肥、农药及灌溉的大量使用。它极大提升了印度和墨西哥等国的粮食产量，但也因高投入成本有利于较富裕农户，引发了环境破坏和社会不平等。

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10. Industrial Systems and Energy | 工业系统与能源

Industry can be modelled as a system with inputs (raw materials, labour, capital), processes (manufacturing, assembly), and outputs (finished products, profit, waste). Industry is divided into four sectors: primary (extraction), secondary (manufacturing), tertiary (services), and quaternary (research and IT).

工业可视为由投入（原料、劳动力、资本）、过程（制造、组装）和产出（成品、利润、废料）构成的系统。产业分为第一产业（采掘）、第二产业（制造）、第三产业（服务）和第四产业（研发与信息技术）。

Industrial location factors include proximity to raw materials, energy, market, labour, and transport. Heavy industries such as steel often locate near coalfields; footloose industries, like electronics, can locate anywhere with good communications. Transnational corporations (TNCs) operate across national boundaries, benefiting from low‑cost labour and global supply chains.

工业区位因素包括靠近原料、能源、市场、劳动力和交通。钢铁等重工业常靠近煤田；电子等自由布局型工业则倾向通讯优良的任一地区。跨国公司（TNCs）跨越国界运作，利用低成本劳动力和全球供应链获益。

Energy sources are classified as non‑renewable (coal, oil, natural gas, nuclear) and renewable (solar, wind, hydro, tidal, geothermal, biomass). Energy consumption is rising globally, leading to concerns about resource depletion, climate change from greenhouse gases, and the need for sustainable energy policies.

能源分为非可再生（煤、石油、天然气、核能）和可再生（太阳能、风能、水力、潮汐、地热、生物质能）。全球能源消耗不断上升，引发资源枯竭、温室气体致气候变化等忧虑，可持续能源政策因而迫在眉睫。

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11. Development and Globalisation | 发展与全球化

Development is measured using economic indicators (GDP per capita, employment structure) and social indicators (literacy rate, life expectancy, infant mortality). Composite indices such as the Human Development Index (HDI) combine income, health, and education. The Gini coefficient indicates the degree of income inequality within a country.

发展程度通过经济指标（人均GDP、就业结构）和社会指标（识字率、预期寿命、婴儿死亡率）来衡量。人类发展指数（HDI）等综合指标融合了收入、健康和教育三个维度。基尼系数反映一国内部的收入不平等程度。

Global disparities exist because of physical factors (climate, resources, landlocked location) and historical factors (colonialism, trade imbalances). The north‑south divide broadly separates wealthy MEDCs from poorer LEDCs, although newly industrialising countries (NICs) are catching up rapidly.

全球发展差异源于自然因素（气候、资源、内陆位置）和历史因素（殖民主义、贸易不平衡）。南北分异大致划分了富裕的发达国家与较贫穷的发展中国家，但新兴工业化国家（NICs）正在迅速追赶。

Globalisation is the increasing interconnectedness of economies, cultures, and societies. It is driven by improvements in transport, ICT, and trade liberalisation. While it promotes economic growth and cultural exchange, it can also widen inequalities and threaten local cultures. Aid, fair trade, and debt relief are strategies to reduce the development gap.

全球化是经济、文化和社会的日益紧密联系，由交通运输、信息通讯进步和贸易自由化推动。既促进经济增长与文化交融，也可能扩大不平等并威胁本土文化。援助、公平贸易与债务减免是缩小发展差距的对策。

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12. Water Resources Management | 水资源管理

The hydrological cycle describes the continuous movement of water above, on, and below the Earth’s surface. Key processes include evaporation, transpiration, condensation, precipitation, infiltration, percolation, and throughflow. Stores of water can be in the atmosphere, vegetation, soil, rivers, lakes, groundwater, and oceans.

水文循环描述水在地表以上、地表及地下的持续运动。关键过程包括蒸发、蒸腾、凝结、降水、下渗、渗漏和壤中流。储水体存在于大气、植被、土壤、河流、湖泊、地下水和海洋中。

Water scarcity can be physical (insufficient supply) or economic (lack of infrastructure to access water). Rising demand is due to population growth, agricultural irrigation, and industrialisation. Many regions, especially in semi‑arid areas, face acute water stress.

水资源短缺分为物理性短缺（水资源本身不足）和经济性短缺（缺乏获取水资源的基础设施）。人口增长、农业灌溉和工业化推动了用水需求的持续上升。半干旱地区尤甚，面临严重水压力。

Water management strategies include large‑scale dams and reservoirs, which store water for irrigation and hydroelectric power, but may displace communities and alter ecosystems. Small‑scale solutions such as rainwater harvesting, drip irrigation, and desalination offer more sustainable alternatives. Water conservation and pollution control are also crucial.

水资源管理策略包括大型水坝与水库，可蓄水用于灌溉和水力发电，但可能造成社区搬迁并改变生态系统。雨水收集、滴灌和海水淡化等小尺度方案提供了更可持续的替代选择。节水与污染防治同样至关重要。

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