KS3 Cambridge Geography: Key Knowledge Review | KS3剑桥地理：核心知识点梳理

📚 KS3 Cambridge Geography: Key Knowledge Review | KS3剑桥地理：核心知识点梳理

The KS3 Cambridge Geography curriculum builds a strong foundation in understanding our planet, its physical processes, and human interactions with the environment. This article brings together the core topics you need to know, from map reading to global issues like climate change.

KS3剑桥地理课程为理解我们的星球、其自然过程以及人类与环境的相互作用奠定了坚实的基础。本文汇总了您需要掌握的核心主题，从地图阅读到气候变化等全球性问题。

1. Map Skills and Geographical Enquiry | 地图技能与地理探究

To locate places on a map, geographers use four-figure and six-figure grid references. Four-figure references (e.g., 1532) identify a grid square, while six-figure references (e.g., 154328) pinpoint an exact location with greater precision. Compass directions (N, NE, E, SE, S, SW, W, NW) help describe the relative position of features.

为了在地图上定位地点，地理学家使用四位和六位数字的网格参考。四位数字参考（例如 1532）确定一个网格方格，而六位数字参考（例如 154328）可以更精确地定位具体位置。罗盘方向（北、东北、东、东南、南、西南、西、西北）有助于描述地物之间的相对位置。

Every map has a scale that shows the relationship between distances on the map and real distances on the ground. Scales can be shown as a statement (1 cm represents 1 km), a linear scale bar, or a representative fraction (1:100 000). Symbols and a key are used to represent real-world features like roads, rivers, and buildings.

每张地图都有比例尺，显示地图上的距离与实地实际距离之间的关系。比例尺可以表示为文字说明（1厘米代表1千米）、线状比例尺或分数式比例尺（1:100 000）。地图使用符号和图例来表示道路、河流和建筑物等真实世界的地物。

Contour lines join points of equal height on a map, showing the shape and steepness of the land. Closely spaced contours indicate steep slopes; widely spaced contours show gentle slopes. Geographers draw labelled field sketches and cross-sections to record and interpret landscapes during fieldwork.

等高线连接地图上高度相等的点，显示地形的形状和坡度。等距的等高线紧密表示陡坡；间距宽表示缓坡。地理学家在野外工作中绘制标注的实地草图和剖面图来记录和解释景观。

2. Plate Tectonics, Volcanoes and Earthquakes | 板块构造、火山与地震

The Earth consists of the inner core, outer core, mantle, and crust. The rigid crust and upper mantle form the lithosphere, which is broken into tectonic plates that float on the semi-molten asthenosphere. Heat-driven convection currents in the mantle slowly move these plates.

地球由内核、外核、地幔和地壳组成。坚硬的岩石圈包括地壳和上地幔，它分裂成多个构造板块，漂浮在半熔融的软流圈之上。地幔中由热量驱动的对流缓慢地移动着这些板块。

At constructive boundaries, plates move apart and magma rises to form new crust, creating mid-ocean ridges and shield volcanoes. At destructive boundaries, an oceanic plate subducts beneath a continental plate, producing deep-sea trenches, fold mountains, and composite volcanoes. Conservative boundaries see plates sliding past each other, causing earthquakes but without volcanic activity.

在建设性边界，板块相互分离，岩浆上升形成新的地壳，从而产生大洋中脊和盾状火山。在破坏性边界，大洋板块俯冲到大陆板块之下，形成深海沟、褶皱山脉和复式火山。保守边界是板块相互滑过，引发地震但没有火山活动。

Volcanoes and earthquakes occur mainly along plate boundaries. The Pacific Ring of Fire is a zone of intense volcanic and seismic activity. Hazards include lava flows, ash clouds, pyroclastic flows, tsunamis, and ground shaking. Monitoring, early warning systems, and building earthquake-resistant structures help reduce risk.

火山和地震主要发生在板块边界附近。环太平洋火山带是一个火山和地震活动强烈的区域。灾害包括熔岩流、火山灰云、火山碎屑流、海啸和地面震动。监测、预警系统和建造抗震建筑物有助于减少风险。

3. Weathering and Erosion | 风化与侵蚀作用

Weathering is the breakdown of rocks in situ, without movement. Physical weathering includes freeze-thaw action, where water freezes in cracks and expands, splitting the rock. Chemical weathering occurs when rainwater (slightly acidic) dissolves limestone or other minerals. Biological weathering involves roots and burrowing animals weakening rock.

风化是岩石在原地、不发生移动的分解过程。物理风化包括冻融作用，即水在裂缝中结冰膨胀，导致岩石碎裂。化学风化发生在雨水（微酸性）溶解石灰岩或其他矿物时。生物风化则涉及植物根系和穴居动物对岩石的削弱。

Erosion is the wearing away and removal of rock by moving agents such as water, wind, waves, and ice. Rivers erode their channels through hydraulic action, abrasion, attrition, and solution. Coastal cliffs are undercut by wave erosion using similar processes.

侵蚀是运动中的介质（如水、风、波浪和冰）对岩石的磨损和搬运。河流通过水力作用、磨蚀、磨耗和溶蚀来侵蚀河床。海岸悬崖被波浪侵蚀以类似的方式掏蚀。

After rocks are broken

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