📚 Common Misconceptions in IGCSE WJEC Geography and How to Correct Them | IGCSE WJEC 地理常见误区与纠正方法
IGCSE WJEC Geography candidates often lose marks not because they do not know the content, but because they use key terms imprecisely or hold onto common misunderstandings. This revision guide identifies frequent misconceptions and shows how to correct them with clear, exam-ready language.
IGCSE WJEC 地理考生丢分往往不是因为没学过内容，而是因为关键术语使用不准确或固守常见误解。本复习指南指出高频误区，并展示如何用清晰、适合考试的语言加以纠正。
1. Weather vs Climate | 天气与气候
Many answers say ‘the climate today is wet and windy’ or describe climate as a forecast. This confuses short-term atmospheric conditions with long-term averages.
很多答案会说“今天气候潮湿多风”，或者把气候当成天气预报来描述。这混淆了短期大气状况与长期平均状况。
Weather is the day-to-day state of the atmosphere, including temperature, precipitation, wind and humidity. Climate is the average weather over a long period, usually 30 years. In an exam, define weather as ‘short-term’ and climate as ‘long-term average’.
天气是逐日的大气状态，包括气温、降水、风和湿度。气候是长期（通常为 30 年）的平均天气。考试中应把天气定义为“短期”，把气候定义为“长期平均”。
2. Latitude and Global Temperature | 纬度与全球气温
Students often claim the equator is the hottest place on Earth because it is closest to the Sun. They also assume temperature decreases smoothly with latitude.
学生常声称赤道是地球上最热的地方，因为它离太阳最近。他们还假设气温随纬度均匀下降。
Latitude affects the angle of insolation and the thickness of atmosphere the radiation passes through, not distance alone. The hottest deserts, such as the Sahara, are around 20°-30° north of the equator because sinking air suppresses cloud formation. Altitude, ocean currents and cloud cover also affect temperature, so temperature does not fall evenly with latitude.
纬度影响太阳辐射入射角和大气穿过厚度，而不仅是距离。最热的沙漠（如撒哈拉）位于赤道以北约 20°-30°，因为下沉气流抑制云层形成。海拔、洋流和云量也会影响气温，因此气温并不随纬度均匀下降。
3. Weathering vs Erosion | 风化与侵蚀
A common error is writing ‘freeze-thaw erosion’ or ‘acid rain erosion of limestone’ when the rock is broken down in situ. Weathering and erosion are treated as the same process.
常见错误是写“冻融侵蚀”或“酸雨侵蚀石灰岩”，但岩石是原地被破坏的。风化和侵蚀被当成同一过程。
Weathering is the breakdown of rock in place, without movement. It can be physical, chemical or biological. Erosion requires a moving agent, such as water, wind, ice or gravity, to remove and transport material. Freeze-thaw action is physical weathering, not erosion, because the broken fragments stay in position until a geomorphic agent moves them.
风化是岩石在原地破裂、分解，不发生移动。它可分为物理、化学和生物风化。侵蚀需要有流动的介质，如水、风、冰或重力，来带走和搬运物质。冻融作用属于物理风化，而不是侵蚀，因为破碎的碎屑停留在原地，直到地貌营力将它们移走。
4. Population Density vs Population Distribution | 人口密度与人口分布
Candidates often use ‘density’ when they mean ‘distribution’. They might write ‘the population density is clustered along the Nile’, which is a distribution statement.
考生常在该说“distribution（分布）”的地方使用“density（密度）”。他们可能写“人口密度集中在尼罗河沿岸”，这其实是分布描述。
Population density is the number of people per square kilometre, calculated as total population divided by area. Population distribution is the pattern of where people live, such as linear, clustered or dispersed. Egypt has a low overall density, but a very uneven distribution: most people live along the Nile and its delta.
人口密度是每平方公里的人口数，用总人口除以面积计算。人口分布是人口居住的空间格局，如线状、聚集或分散。埃及总体人口密度较低，但分布极不均衡：大多数人居住在尼罗河及其三角洲沿岸。
5. Urbanisation vs Urban Growth | 城市化与城市增长
Many answers say urbanisation means cities are getting bigger in size or that urban population is increasing in total. This misses the key idea of proportion.
许多答案说城市化就是城市规模扩大或城市总人口增加。这忽略了比例这一关键概念。
Urbanisation is the increasing percentage of a country’s population living in urban areas. Urban growth is the absolute increase in the urban population or physical area of cities. A city can grow in population without urbanisation if the rural population grows at the same rate.
城市化是指一个国家居住在城市地区的人口比例不断上升。城市增长是城市人口或城市实体面积的绝对增加。如果农村人口以相同速度增长，城市人口增加可能不会带来城市化率上升。
6. Causes of Earthquakes and Volcanoes | 地震与火山的成因
Students often say earthquakes and volcanoes happen everywhere on plate boundaries and that ridges only produce volcanoes, not earthquakes.
学生常说地震和火山发生在板块边界的任何地方，并认为洋中脊只产生火山，不产生地震。
Most seismic and volcanic activity occurs at plate margins, but not all boundaries are the same. Constructive boundaries, such as the Mid-Atlantic Ridge, produce volcanic activity and shallow earthquakes through plates moving apart. Destructive boundaries produce deep earthquakes and explosive volcanoes through subduction. Conservative boundaries mainly produce earthquakes. Hotspots such as Hawaii produce volcanoes inside plates, so ‘all volcanoes are on plate boundaries’ is false.
大多数地震和火山活动发生在板块边界，但边界类型不同。建设性边界（如大西洋中脊）通过板块分离产生火山活动和浅源地震。破坏性边界通过俯冲产生深源地震和爆炸性火山。保守边界主要产生地震。像夏威夷这样的热点在板块内部产生火山，因此“所有火山都在板块边界”是错误的。
7. River Erosion and Transportation | 河流侵蚀与搬运
Candidates confuse the four erosion processes (hydraulic action, abrasion, attrition, solution) with transportation processes, and may state rivers deposit large boulders in the lower course.
考生混淆四种侵蚀过程（水力作用、磨蚀、磨圆、溶蚀）与搬运过程，并可能说河流在下游沉积大石块。
River erosion involves wearing away the bed and banks. Hydraulic action is the force of water; abrasion is the river using its load to scrape; attrition is particles colliding and becoming smaller; solution dissolves soluble rocks. Transportation includes suspension, saltation, traction and solution. Deposition of large material occurs where energy drops, usually in the upper or middle course, not the low-energy lower course where fine silt is deposited.
河流侵蚀涉及磨损河床和河岸。水力作用是水的冲击力；磨蚀是河流利用搬运物刮蚀；磨圆是颗粒相互碰撞变小；溶蚀是溶解可溶岩石。搬运包括悬浮、跃移、推移和溶解。大颗粒物质在能量下降处沉积，通常在上游或中游，而非低能量的下游——下游主要沉积细泥沙。
8. Development Indicators and Quality of Life | 发展指标与生活质量
Many candidates believe a high GDP per person automatically means a high quality of life and that one indicator is enough to judge development.
许多考生认为人均 GDP 高就意味着生活质量高，并且单一指标足以判断发展水平。
GDP measures economic output but not income distribution, health, education, safety or environmental quality. A country can have high GDP yet poor life expectancy or high inequality. The Human Development Index (HDI) combines life expectancy, education and income to provide a wider measure. Quality of life also includes non-measurable factors such as political freedom and personal wellbeing.
GDP 衡量经济产出，但不反映收入分配、健康、教育、安全或环境质量。一个国家可能 GDP 很高，但预期寿命低或贫富差距大。人类发展指数（HDI）综合预期寿命、教育和收入，提供更全面的衡量。生活质量还包括政治自由和个人幸福感等难以量化的因素。
9. Renewable Energy vs Sustainable Energy | 可再生能源与可持续能源
Students often write that all renewable energy is automatically sustainable and has no environmental impact.
学生常写所有可再生能源都自动是可持续的，并且对环境没有影响。
Renewable means the resource is replenished naturally, such as solar, wind, hydro or biomass. Sustainable means the energy can be used indefinitely without unacceptable damage to environment, society or economy. Large hydropower is renewable but can flood ecosystems, displace people and release methane from submerged vegetation, so it may not be fully sustainable. Judgements require considering local impacts and long-term costs.
可再生意味着资源可自然补充，如太阳能、风能、水能或生物质能。可持续意味着能源能够长期使用，不对环境、社会或经济造成不可接受的损害。大型水电站是可再生的，但可能淹没生态系统、使居民迁移并释放被淹没植被产生的甲烷，因此未必完全可持续。判断需要结合当地影响和长期成本。
10. Climate Change vs Ozone Depletion | 气候变化与臭氧层空洞
A very frequent error is to say the ozone hole causes global warming or that climate change is caused by the hole in the ozone layer.
一个高频错误是说臭氧层空洞导致全球变暖，或者说气候变化是由臭氧层空洞引起的。
Global warming is driven by enhanced greenhouse gas emissions, mainly CO₂, CH₄ and N₂O, trapping longwave radiation. Ozone depletion is caused by CFCs destroying stratospheric ozone, allowing more harmful UV radiation to reach the surface. The two are separate problems, although some CFCs are also greenhouse gases. Do not write ‘the ozone hole lets heat from the Sun in to warm the Earth’.
全球变暖由温室气体排放增强引起，主要是 CO₂、CH₄ 和 N₂O 截留长波辐射。臭氧层损耗由氯氟烃（CFCs）破坏平流层臭氧引起，使更多有害紫外线到达地表。这是两个不同的问题，尽管某些 CFCs 也是温室气体。不要写“臭氧层空洞让太阳热量进入地球使其变暖”。
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