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初中地理第一册“地理工具与地理实践”必考知识点
初中地理第一册“地理工具与地理实践”必考知识点 "Geographic Tools and Geographic Practice": Key Exam Points 第一单元是整个初中地理学习的“工具箱”。 Unit 1 is the "toolbox" for all of junior high school geography. 后续的地球运动、气候分布、区域认知，全都建立在经纬网定位和地图判读这两项基本技能之上。 Later topics like Earth's movements, climate distribution, and regional knowledge all build on two basic skills: finding places on a graticule and reading maps. 从考试角度看，本单元的命题集中在经纬网坐标判读与半球划分、比例尺大小比较与应用、等高线地形图部位判读三个核心区域，选择题、填图题、综合题均高频出现。 For exams, this unit focuses on three core areas: reading graticule coordinates and dividing hemispheres, comparing and using map scales, and reading contour maps. These appear often in multiple-choice, map-filling, and comprehensive questions. 以下按节展开，逐点细化。 Below, we go through each section point by point. 第一节 地球仪 Section 1: The Globe 一、地球的形状与大小（识记类考点） The Shape and Size of the Earth (memory-based exam points) 人类对地球形状的认识经历了从猜想到证实、从定性到定量的过程。 Humans' understanding of Earth's shape went from guessing to proving, and from qualitative to quantitative. 考试中常见的考法是将认识阶段与对应事件匹配。 A common exam task is to match each stage of understanding with the right event. 认识过程的四个阶段： Four stages of understanding: 第一阶段是直觉猜想。 The first stage is intuitive guessing. 我国古代有“天圆如张盖，地方如棋局”的说法，即“天圆地方”的盖天说。 In ancient China, people said "the sky is round like a canopy, and the earth is square like a chessboard." This is the "round sky, square earth" idea. 这一阶段基于肉眼观察和想象，没有实证依据。 This stage was based on what people saw with their eyes and on imagination. There was no real evidence. 第二阶段是推测。 The second stage is inference. 人们观察到太阳和月球的形状是圆的，又发现月食时月球被地球遮挡部分的边缘呈圆弧形，由此推测地球可能是一个球体。 People saw that the sun and moon look round. During a lunar eclipse, they saw that the shadow of Earth on the moon has a curved edge. From this, they inferred that Earth might be a sphere. 同时，海上归来的帆船总是先露出桅杆、再露出船身，也支持了“地球是球体”的推测。 Also, ships coming back from the sea always show their masts first and then their bodies. This also supported the idea that Earth is a sphere. 第三阶段是实践证实。 The third stage is proof by practice. 16世纪，麦哲伦船队完成环球航行，第一次用实践证明了地球是一个球体。 In the 16th century, Magellan's fleet sailed around the world. For the first time, practice proved that Earth is a sphere. 这里需要注意：麦哲伦本人并未完成全程，船队在麦哲伦死后继续航行最终返回西班牙，但教材通常表述为“麦哲伦船队环球航行证实”。 Note: Magellan himself did not finish the whole trip. After he died, the fleet kept sailing and finally returned to Spain. But textbooks usually say "Magellan's fleet sailed around the world and proved it." 第四阶段是科学确证。 The fourth stage is scientific confirmation. 20世纪人类进入太空后，从卫星拍摄的地球照片可以直观看到地球的形状；通过精确测量，科学家确认地球是一个两极稍扁、赤道略鼓的不规则球体。 In the 20th century, humans went into space. Photos of Earth taken by satellites let us see its shape directly. Through careful measurement, scientists confirmed that Earth is an irregular sphere, a little flat at the poles and a little bulging at the equator. 必背数据： Must-remember numbers: 平均半径：6371千米 Average radius: 6,371 km 赤道周长：约4万千米 Equator length: about 40,000 km 表面积：约5.1亿平方千米 Surface area: about 510 million km² 这三个数字常以填空题或选择题形式出现。 These three numbers often appear in fill-in-the-blank or multiple-choice questions. 需要注意“平均半径”不是赤道半径，赤道半径约为6378千米，极半径约为6357千米，赤道半径比极半径长约21千米，这正是“两极稍扁、赤道略鼓”的数据依据。 Note that "average radius" is not the same as the equatorial radius. The equatorial radius is about 6,378 km, and the polar radius is about 6,357 km. The equatorial radius is about 21 km longer. This is the data behind "flat at the poles, bulging at the equator." 常见考法提示：给出“天圆地方”“麦哲伦环球航行”“卫星照片”等描述，要求按时间或认知阶段排序；或问“哪一事件证实了地球是球体”（答案：环球航行），注意区分“推测”与“证实”。 Common exam tip: You may be given descriptions like "round sky, square earth," "Magellan's round-the-world sail," and "satellite photos," and asked to put them in time order or stage order. Or you may be asked "which event proved Earth is a sphere" (answer: the round-the-world sail). Be careful to tell "inference" apart from "proof." 二、地球仪的基本构造 The Basic Structure of a Globe 地球仪是按一定比例缩小的地球模型。 A globe is a model of Earth made smaller by a certain scale. 需要掌握三个基本元素： You need to know three basic parts: 地轴：穿过球心的假想旋转轴。 Earth's axis: an imaginary turning line through the center of the globe. 注意“假想”二字，地轴实际上并不存在。 Note the word "imaginary." Earth's axis does not really exist. 地轴与地球表面有两个交点，上端为北极，下端为南极。 The axis meets Earth's surface at two points. The top one is the North Pole, and the bottom one is the South Pole. 北极与南极：地轴与地球表面的两个交点。 North Pole and South Pole: the two points where the axis meets Earth's surface. 北极是地轴北端与表面的交点，南极是南端交点。 The North Pole is where the north end of the axis meets the surface. The South Pole is where the south end meets the surface. 经纬线：地球仪上用于定位的网格系统，下一部分详述。 Lines of latitude and longitude: the grid system on a globe used to locate places. We will explain it in the next part. 三、经线与纬线的对比（高频选择题/判断题） Comparing Lines of Longitude and Latitude (common multiple-choice and true/false questions) 这是本单元最基础的对比性知识，必须从形状、长度、指示方向、相互关系四个维度准确区分。 This is the most basic comparison in this unit. You must tell them apart by shape, length, direction they show, and how they relate to each other. 经线的特征： Features of lines of longitude: 定义：连接南北两极的半圆弧线，也叫子午线。 Definition: half-circle lines that connect the North and South Poles. They are also called meridians. 形状：半圆。任意两条相对的经线（经度之和为180°，一东一西）可以组成一个完整的经线圈。 Shape: half circles. Any two opposite lines of longitude (their degrees add up to 180°, one east and one west) can make a full circle. 长度：所有经线长度相等。 Length: all lines of longitude are equal in length. 指示方向：南北方向。 Direction: north-south. 相互关系：所有经线都在南北两极相交。 Relationship: all lines of longitude meet at the North and South Poles. 纬线的特征： Features of lines of latitude: 定义：与地轴垂直并且环绕地球一周的圆圈。 Definition: circles that are perpendicular to Earth's axis and go all the way around Earth. 形状：圆圈（除极点外，极点是一个点）。 Shape: circles (except at the poles, where a pole is just a point). 长度：不相等。赤道最长，自赤道向南北两极逐渐缩短，到极点缩为一点。 Length: not equal. The equator is the longest. From the equator toward the poles, the circles get shorter and shorter, until they become a point at the poles. 指示方向：东西方向。 Direction: east-west. 相互关系：所有纬线平行，不相交。 Relationship: all lines of latitude are parallel and never meet. 特殊线： 0°经线叫本初子午线，是东西经的分界；0°纬线叫赤道，是最长的纬线，也是南北半球的分界。 Special lines: the 0° longitude line is called the Prime Meridian. It divides east longitude from west longitude. The 0° latitude line is called the equator. It is the longest line of latitude and divides the Northern and Southern Hemispheres. 易错提醒：经线指示南北方向，纬线指示东西方向——这个对应关系容易记反。 Easy-to-mix-up tip: lines of longitude show north-south, and lines of latitude show east-west. This pairing is easy to mix up. 记忆方法：经线是连接南北两极的，所以它“指向”南北；纬线是环绕地球东西方向的圈，所以它“指向”东西。 Memory trick: lines of longitude connect the poles, so they "point" north-south. Lines of latitude go around Earth east-west, so they "point" east-west. 四、经度与纬度的判读（核心技能，必考） Reading Longitude and Latitude (core skill, must-test) 经度的划分： Dividing longitude: 从0°经线（本初子午线）向东，称为东经，用“E”表示，数值从0°向东增大到180°；向西称为西经，用“W”表示，数值从0°向西增大到180°。最大经度为180°。 From the 0° line (Prime Meridian) going east, it is called east longitude, written "E." The numbers go from 0° eastward up to 180°. Going west, it is called west longitude, written "W." The numbers go from 0° westward up to 180°. The largest longitude is 180°. 判读方法：在经纬网图上，顺着数值增大的方向看——如果经度数值向东增大，就是东经；如果向西增大，就是西经。 How to read: on a graticule map, look at the direction in which the numbers get bigger. If the longitude numbers get bigger toward the east, it is east longitude. If they get bigger toward the west, it is west longitude. 纬度的划分： Dividing latitude: 以赤道（0°纬线）为起点，向北称为北纬，用“N”表示，数值从0°向北增大到90°；向南称为南纬，用“S”表示，数值从0°向南增大到90°。最大纬度为90°（极点）。 Starting from the equator (0° latitude), going north is north latitude, written "N." The numbers go from 0° northward up to 90°. Going south is south latitude, written "S." The numbers go from 0° southward up to 90°. The largest latitude is 90° (at the poles). 判读方法：纬度数值向北增大的是北纬，向南增大的是南纬。 How to read: if the latitude numbers get bigger toward the north, it is north latitude. If they get bigger toward the south, it is south latitude. 低、中、高纬度的划分： Low, middle, and high latitudes: 低纬度：0°～30° Low latitude: 0°–30° 中纬度：30°～60° Middle latitude: 30°–60° 高纬度：60°～90° High latitude: 60°–90° 需要注意：纬度带的边界（30°、60°）与五带的边界（23.5°、66.5°）不同，不要混淆。 Note: the borders of latitude zones (30°, 60°) are different from the borders of the five temperature zones (23.5°, 66.5°). Do not mix them up. 五、半球的划分（最大易错点） Dividing the Hemispheres (the biggest easy-to-miss point) 南北半球： 以赤道（0°纬线）为界。 Northern and Southern Hemispheres: divided by the equator (0° latitude). 北纬全部在北半球，南纬全部在南半球。 All north latitude is in the Northern Hemisphere. All south latitude is in the Southern Hemisphere. 赤道上的点既不属北半球也不属南半球。 A point on the equator is in neither the Northern nor the Southern Hemisphere. 东西半球： 以20°W和160°E组成的经线圈为界。 Eastern and Western Hemispheres: divided by the longitude circle made of 20°W and 160°E. 这是全单元最容易出错的知识点，因为学生常误以为0°和180°是东西半球分界。 This is the easiest point to get wrong in the whole unit, because students often think 0° and 180° divide the Eastern and Western Hemispheres. 判断方法（口诀法）： How to judge (memory rhyme): “小小为东，大大为西”。 "Small-small is east, big-big is west." 具体操作： In practice: 如果经度是东经（E）：与160°比较。小于160°E的，在东半球；大于160°E的，在西半球。 If the longitude is east longitude (E): compare it with 160°. If it is less than 160°E, it is in the Eastern Hemisphere. If it is more than 160°E, it is in the Western Hemisphere. 如果经度是西经（W）：与20°W比较。小于20°W的，在东半球；大于20°W的，在西半球。 If the longitude is west longitude (W): compare it with 20°W. If it is less than 20°W, it is in the Eastern Hemisphere. If it is more than 20°W, it is in the Western Hemisphere. 简言之：东经小于160°、西经小于20°的都在东半球；东经大于160°、西经大于20°的都在西半球。 In short: east longitude less than 160° and west longitude less than 20° are in the Eastern Hemisphere. East longitude more than 160° and west longitude more than 20° are in the Western Hemisphere. 介于20°W至160°E之间的经度，东经部分在东半球，西经部分在西半球。 For longitudes between 20°W and 160°E, the east longitude part is in the Eastern Hemisphere, and the west longitude part is in the Western Hemisphere. 为什么不用0°和180°？ 因为如果以0°和180°划分，会把欧洲、非洲的许多国家分割到两个半球，而20°W和160°E经线圈主要穿过海洋，对陆地国家的切割最少，是人为选定的最优分界线。 Why not use 0° and 180°? If we used 0° and 180°, many countries in Europe and Africa would be split into two hemispheres. The 20°W and 160°E circle mostly passes through oceans, so it cuts through the fewest countries on land. It is the best line people chose. 这一点偶尔以简答题形式考查。 This point sometimes appears as a short-answer question. 六、经纬网定位（综合应用题必考） Locating Places on a Graticule (must-test in comprehensive questions) 经纬网是经线和纬线交织形成的网格。 A graticule is a grid made by lines of longitude and latitude crossing each other. 地球表面任意一点的位置，就是某条经线与某条纬线的交点。 Any point on Earth's surface is where one line of longitude meets one line of latitude. 坐标书写规范： 纬度在前，经度在后，用括号括起，中间用逗号隔开。 How to write coordinates: latitude first, longitude second, inside brackets, separated by a comma. 例如：北京大致位于（40°N，116°E）。 For example, Beijing is roughly at (40°N, 116°E). 书写时注意：N/S在前，E/W在后；数值不要漏写度符号。 When writing, note: N/S comes first, E/W comes second. Do not forget the degree sign. 在经纬网图上确定坐标的步骤： Steps to find coordinates on a graticule map: 第一步：判断纬度。看横向的线（纬线），数值向上增大的是北纬，向下增大的是南纬。如果没有标注数值，观察赤道的位置。 Step 1: Find the latitude. Look at the horizontal lines (lines of latitude). If the numbers get bigger going up, it is north latitude. If they get bigger going down, it is south latitude. If there are no numbers, look for the equator. 第二步：判断经度。看纵向的线（经线），数值向右（东）增大的是东经，向左（西）增大的是西经。 Step 2: Find the longitude. Look at the vertical lines (lines of longitude). If the numbers get bigger to the right (east), it is east longitude. If they get bigger to the left (west), it is west longitude. 第三步：按“纬度，经度”的顺序书写坐标。 Step 3: Write the coordinates in the order "latitude, longitude." 经纬网的应用： 经纬网定位被广泛应用于航海、航空、军事、交通、地质、气象等领域。 Uses of the graticule: graticule location is widely used in sailing, aviation, the military, transportation, geology, weather, and other fields. 这一应用性表述常以简答题或材料题背景出现，需能列举至少两个领域。 This use is often the background for short-answer or material questions. You need to be able to list at least two fields. 第二节 地图 Section 2: Maps 一、地图的基本要素（三要素框架） The Basic Elements of a Map (the three-element framework) 地图是将某一区域的地理事物按一定比例缩小，并用符号表示在平面上的图形。 A map is a drawing that makes a region smaller by a certain scale and shows geographic things on a flat surface with symbols. 比例尺、方向、图例是地图的三个基本要素。 Scale, direction, and legend are the three basic elements of a map. 这三个要素构成了地图判读的全部基础，任何一幅地图的阅读都从这三项入手。 These three elements are the whole basis for reading maps. Reading any map starts with these three. 二、比例尺（计算与比较，必考） Map Scale (calculating and comparing, must-test) 概念与公式： Concept and formula: 比例尺表示图上距离比实地距离缩小的程度。 Scale shows how much the map distance is smaller than the real distance. 公式为：比例尺 = 图上距离 ÷ 实地距离。 The formula is: scale = map distance ÷ real distance. 使用公式时，分子分母的单位必须统一（通常统一为厘米）。 When using the formula, the units of the top and bottom must be the same (usually both in centimeters). 三种表示形式： Three ways to write a scale: 数字式：如 1:100000，或 1/100000。 Number form: like 1:100,000, or 1/100,000. 文字式：如“图上1厘米代表实地距离1千米”。 Word form: like "1 cm on the map means 1 km in real life." 线段式：画一条线段，标注0、1、2千米等刻度。 Line form: draw a line and mark 0, 1, 2 km, and so on. 三种形式之间需要能够互换。 You need to be able to change one form into another. 换算技巧：厘米换算为千米去掉5个0，千米换算为厘米加上5个0。 Conversion trick: to change centimeters to kilometers, remove five zeros. To change kilometers to centimeters, add five zeros. 例如，1:500000 即图上1厘米代表实地5千米；若文字式为“图上1厘米代表135千米”，写成数字式就是1:13500000。 For example, 1:500,000 means 1 cm on the map is 5 km in real life. If the word form is "1 cm on the map means 135 km," the number form is 1:13,500,000. 比例尺的大小比较： Comparing scale size: 比例尺是一个分数。 A scale is a fraction. 分子相同时，分母越大，比例尺越小；分母越小，比例尺越大。 When the top number is the same, the bigger the bottom number, the smaller the scale. The smaller the bottom number, the bigger the scale. 例如，1:3000 的比例尺大于 1:300000，因为前者的分母更小。 For example, 1:3,000 is a bigger scale than 1:300,000, because the first bottom number is smaller. 比较时先把所有比例尺统一转化为数字式再判断。 When comparing, first change all scales into number form, then judge. 比例尺大小与范围、内容的关系（核心规律）： How scale size relates to area and detail (core rule): 在图幅相同的条件下： When the map size is the same: 比例尺越大 → 表示的实际范围越小 → 内容越详细 The bigger the scale → the smaller the real area → the more detailed the content 比例尺越小 → 表示的实际范围越大 → 内容越简略 The smaller the scale → the bigger the real area → the less detailed the content 例如：同样大小的两张纸，画中国地图（范围大）需要小比例尺，内容简略；画北京市地图（范围小）需要大比例尺，内容详细。 For example, on two pieces of paper the same size, a map of China (big area) needs a small scale and shows less detail. A map of Beijing (small area) needs a big scale and shows more detail. 这一规律几乎每次考试都会出现，常见考法：给出一幅中国地图和一幅北京地图，问哪幅比例尺大、哪幅内容详细；或给出图幅相同但比例尺不同的两幅图，判断范围大小。 This rule appears in almost every exam. A common task: you are given a map of China and a map of Beijing, and asked which has the bigger scale and which is more detailed. Or you are given two maps the same size but with different scales, and asked to judge which covers a bigger area. 三、方向的判读（三种情境） Reading Direction (three situations) 地图上方向的判读需要根据地图类型选择方法： To read direction on a map, choose the method based on the map type: 情境一：有指向标的地图。 Situation 1: a map with a direction marker. 指向标的箭头通常指向北方。 The arrow of the direction marker usually points north. 判读时，先将指向标平移到参考点，确定北方，再依次确定东、南、西。 To read it, first move the direction marker to the reference point, find north, and then find east, south, and west. 这是最容易失分的情境，因为指向标不一定竖直朝上，箭头可能指向任意方向。 This is the easiest situation to lose points in, because the marker does not always point straight up. The arrow may point in any direction. 情境二：有经纬网的地图。 Situation 2: a map with a graticule. 经线指示南北方向，纬线指示东西方向。 Lines of longitude show north-south, and lines of latitude show east-west. 在经纬网图上判断两点相对方向时，先根据经线定南北，再根据纬线定东西。 When judging the direction between two points on a graticule map, first use the longitude lines to find north-south, then use the latitude lines to find east-west. 注意：在极地为中心的经纬网图上，方向的判断需要额外注意地球自转方向（北逆南顺），但粤人版七上对此要求较低，以侧视经纬网为主。 Note: on a graticule map centered on a pole, you also need to watch Earth's turning direction (counterclockwise at the North Pole, clockwise at the South Pole). But the Yuejiao Edition Grade 7 first semester asks less about this and mainly uses side-view graticules. 情境三：既无指向标也无经纬网的地图。 Situation 3: a map with no direction marker and no graticule. 采用一般定向法：“上北下南，左西右东”。 Use the general rule: "up is north, down is south, left is west, right is east." 指向标平移法（重点方法）： Moving the direction marker (key method): 判断A点在B点的什么方向时，将指向标平移到B点（参考点），根据箭头确定B点的北方，然后画出东南西北十字坐标，再看A点落在哪个象限。 To judge what direction point A is from point B, move the direction marker to point B (the reference point). Use the arrow to find north at B, draw a cross for east, south, west, and north, and then see which part A falls in. 例如，A点在B点的西北方向，意味着从B点出发，向北偏西的方向走可以到达A点。 For example, if A is northwest of B, it means that starting from B and going north-west will get you to A. 四、图例与注记 Legend and Notes 图例是地图上用来表示地理事物的各种符号、线条、颜色等。 A legend is the symbols, lines, and colors on a map that stand for geographic things. 注记是地图上的文字说明和数字，如山脉名称、河流名称、城市名称、海拔数值等。 Notes are the words and numbers on a map, like mountain names, river names, city names, and height numbers. 需要能识别常用图例：首都、城市、铁路、公路、河流、湖泊、山峰、等高线、国界、省界等。 You need to recognize common legend symbols: capital, city, railway, road, river, lake, mountain peak, contour line, national border, province border, and so on. 这部分属于基础识记，通常以选择题形式出现，难度较低，但不可完全忽略。 This part is basic memory work. It usually appears as multiple-choice questions. It is easy, but do not ignore it completely. 五、等高线地形图（难点与必考综合题） Contour Maps (difficult and must-test in comprehensive questions) 等高线地形图是本节最重要的能力考点，也是后续学习地形、气候、河流等内容的基础工具。 Contour maps are the most important skill in this section. They are also the basic tool for later topics like landforms, climate, and rivers. 海拔与相对高度： Height above sea level and relative height: 海拔（绝对高度）：地面某地点高出海平面的垂直距离。 Height above sea level (absolute height): the vertical distance from a place on the ground up to sea level. 相对高度：地面某地点高出另一地点的垂直距离。 Relative height: the vertical distance from one place on the ground up to another place. 两者的区别在于参照点不同：海拔的参照点是海平面，相对高度的参照点是另一个地点。 The difference is the starting point: height above sea level starts from sea level, and relative height starts from another place. 考试中常给出等高线图上的两点海拔，要求计算相对高度（两数相减）。 Exams often give the heights of two points on a contour map and ask you to work out the relative height (subtract one from the other). 等高线的基本概念： 在地图上，把海拔相同的各点依次连成的线叫等高线。 Basic idea of contour lines: on a map, a line that joins points with the same height above sea level is called a contour line. 将多条等高线投影到平面上，得到等高线地形图。 Putting many contour lines onto a flat surface gives a contour map. 相邻两条等高线的高度差叫等高距，同一幅图上等高距相同。 The height difference between two next-to-each-other contour lines is called the contour interval. On the same map, the contour interval is the same. 等高线疏密与坡度： Spacing of contour lines and slope: 等高线密集 → 坡度陡 Contour lines close together → slope is steep 等高线稀疏 → 坡度缓 Contour lines far apart → slope is gentle 原因：等高线密集意味着在水平距离很短的情况下海拔变化很大，即坡度陡；稀疏则相反。 Why: close contour lines mean the height changes a lot over a short flat distance, so the slope is steep. Far-apart lines are the opposite. 五种山体部位的判读（核心必考）： Reading five parts of a mountain (core must-test): 山峰：等高线闭合，数值从中间向四周降低（中间高、四周低）。有时用“▲”标注。 Peak: contour lines form a closed shape, and the numbers go down from the middle to the outside (high in the middle, low around it). Sometimes it is marked with "▲." 山脊：等高线的弯曲部分向低处凸出。记忆口诀：“凸低为脊”。山脊是分水岭，水向两侧分流。 Ridge: the bend of the contour line points out toward the low side. Memory rhyme: "bend to low means ridge." A ridge is a watershed, and water flows down both sides. 山谷：等高线的弯曲部分向高处凸出。记忆口诀：“凸高为谷”。山谷是集水线，常发育河流。考试中常问“哪里可能发育河流”，答案选山谷。 Valley: the bend of the contour line points out toward the high side. Memory rhyme: "bend to high means valley." A valley is where water collects, and rivers often form there. Exams often ask "where might a river form?" The answer is a valley. 鞍部：两个山峰之间的低地，形似马鞍。位于两组等高线之间，通常是两条山谷的交汇处或两个山顶的中间地带。 Saddle: the low land between two peaks, shaped like a horse saddle. It lies between two sets of contour lines, usually where two valleys meet or between two mountain tops. 陡崖：多条等高线重合在一起的地方。陡崖处不能攀岩（除非专门设施），在等高线图上常问“哪里适合攀岩”或“哪里可能有瀑布”。 Cliff: a place where many contour lines overlap. You cannot climb a cliff (unless there is special equipment). Contour map questions often ask "where is good for rock climbing" or "where might there be a waterfall." 分层设色地形图： Colored layer maps: 在等高线基础上，按不同高度涂上不同颜色，直观显示地表起伏。 On top of contour lines, different heights are colored differently to show the shape of the land directly. 设色规律：绿色表示平原（海拔低），黄色/褐色表示高原和山地（海拔高），蓝色表示海洋和湖泊（水体），白色表示积雪和冰川。 Color rule: green means plains (low height), yellow/brown means plateaus and mountains (high height), blue means oceans and lakes (water), and white means snow and ice. 颜色越深，表示海拔越高（或水越深）。 The darker the color, the higher the land (or the deeper the water). 陆地五种基本地形类型： 平原（海拔<200米，平坦）、丘陵（海拔200~500米，起伏和缓）、山地（海拔>500米，坡度陡）、高原（海拔高，面积大，边缘陡）、盆地（四周高中间低）。 Five basic land types on land: plain (height < 200 m, flat), hill (height 200–500 m, gentle ups and downs), mountain (height > 500 m, steep), plateau (high, large area, steep edges), basin (high around, low in the middle). 在分层设色地形图和等高线图上能识别这五种地形的基本特征。 You should be able to recognize the basic features of these five land types on colored layer maps and contour maps. 六、地图的选择与应用 Choosing and Using Maps 根据目的选地图： 了解国际时事选世界政区图；了解中国省区分布选中国政区图；了解人口分布选人口分布图；外出自驾选交通图或电子导航地图；公园游览选导游图。 Choose a map by purpose: for world news, choose a world political map. For China's provinces, choose a China political map. For population, choose a population map. For driving, choose a road map or an electronic navigation map. For a park visit, choose a park guide map. 数字地图的特点与优势： 数字地图是以数字形式记录和存储的地图，如电子地图、遥感影像地图。 Features and advantages of digital maps: digital maps are maps recorded and stored in digital form, like electronic maps and remote-sensing image maps. 与传统纸质地图相比，数字地图的比例尺可动态调整、内容可及时更新、信息查找迅速、呈现形式多样、互动性强。 Compared with traditional paper maps, digital maps have a scale that can change at any time, content that can be updated in time, fast information search, many ways to show things, and strong interactivity. 应用领域包括个人出行导航、电商购物、城市管理、资源调查、灾害监测等。 Uses include personal travel navigation, online shopping, city management, resource surveys, and disaster monitoring. 这一部分近年考查比重有所上升，常以材料题形式出现，要求结合生活实例说明数字地图的便利性。 This part has appeared more in exams in recent years. It often comes as a material question and asks you to use everyday examples to explain how convenient digital maps are. 第三节 地理实践 Section 3: Geographic Practice 本节为方法性内容，考查比重低于前两节，但需掌握三种实践方式的基本概念、适用场景和核心流程。 This section is about methods. It is tested less than the first two sections, but you need to know the basic idea, the right situation, and the main steps for three kinds of practice. 考试中通常以选择题或简答题的“背景知识”形式出现，较少单独深度命题。 In exams, it usually appears as background knowledge in multiple-choice or short-answer questions. It is rarely tested deeply on its own. 一、地理实验 Geographic Experiments 概念： 运用相关设备、软件和材料，按照一定程序或方法，通过地理活动检验地理结论或探索地理现象，以获得地理事象本质特征的学习方式。 Concept: using equipment, software, and materials, following certain steps or methods, and doing geographic activities to test geographic conclusions or explore geographic phenomena, so as to learn the true features of geographic things. 特点： 通常在室内进行，包括地理模型和学具的制作与使用，以及演示和模拟实验。 Features: usually done indoors. It includes making and using geographic models and learning tools, and doing demonstration and simulation experiments. 实验方案的基本要素： 实验目的、实验器材、实验步骤、实验结论，最后对实验过程和结果进行评价。 Basic parts of an experiment plan: aim, equipment, steps, conclusion, and finally a review of the process and result. 这四个要素常以排序题或填空题形式考查。 These four parts often appear as ordering or fill-in-the-blank questions. 发展趋势： 随着信息技术发展，地理实验可以借助多媒体、虚拟现实（VR）等营造仿真场景。 Trend: as information technology grows, geographic experiments can use multimedia and virtual reality (VR) to create simulated scenes. 二、社会调查 Social Surveys 概念： 为了了解某一地理事象的实际情况，通过实地调查、人员访谈、问卷回答等形式获取直接地理信息，并对信息进行分析、总结，得出结论或寻求解决方案的研究方法。 Concept: to learn the real situation of a geographic thing, using field surveys, interviews, and questionnaires to get direct geographic information, then analyzing and summarizing it to reach a conclusion or find a solution. 侧重领域： 人文地理内容，如社区人口调查、城市交通状况调查、地区经济发展状况调查等。 Main area: human geography, like community population surveys, city traffic surveys, and local economic development surveys. 流程要素： 明确调查目的、内容、分工、方法和预期成果，制订调查方案，通过问卷或访谈实施，最后对过程和结果进行评价。 Steps: make clear the aim, content, division of work, methods, and expected results. Make a survey plan, carry it out with questionnaires or interviews, and finally review the process and result. 作用： 将所学知识与生活实践相联系，形成关注人文社会的思维习惯。 Use: it connects what you learn with real life and helps you form the habit of paying attention to human society. 三、野外考察 Field Trips 概念： 通过实地观察、观测、调查的形式，认识某一地区内地理事物、地理现象的分布特点和影响因素，获得有关地理事象基本特征及形成原因的学习方式。 Concept: through real observation, measuring, and surveys, learning about the distribution features and causes of geographic things and phenomena in an area, and learning their basic features and why they form. 侧重领域： 自然地理环境，如气象观测、天文观测、河流考察、植被考察、地形地貌考察等。 Main area: the natural environment, like weather observation, astronomy observation, river trips, plant trips, and landform trips. 携带工具提示： 野外考察地形地貌时需携带等高线地形图，这是常识性考点。 Tool tip: when doing a field trip on landforms, you need to bring a contour map. This is a common-sense exam point. 三种实践方式的对比记忆： 地理实验在室内、侧重模拟验证；社会调查侧重人文、用问卷访谈；野外考察在室外、侧重自然、用观察观测。 Memory comparison of the three kinds of practice: geographic experiments are indoors and focus on simulation and testing. Social surveys focus on human geography and use questionnaires and interviews. Field trips are outdoors, focus on nature, and use observation and measuring. 本单元备考优先级与易错点总结 Summary of Exam Priorities and Easy-to-Miss Points for This Unit 第一优先级（必须拿满分）： 经纬网坐标判读与东西半球划分。 First priority (must get full marks): reading graticule coordinates and dividing the Eastern and Western Hemispheres. 这是全单元乃至全册书的基础工具，后续地球运动、气候分布、区域定位都依赖这一技能。 This is the basic tool for the whole unit and even the whole book. Later topics like Earth's movements, climate distribution, and regional location all depend on this skill. 练习时重点关注：数值变化方向与E/W、N/S的对应；东西半球“小小为东、大大为西”的熟练运用；坐标书写格式（纬度在前、经度在后）。 When practicing, focus on: how the direction the numbers change matches E/W and N/S; using "small-small is east, big-big is west" well; and the coordinate writing format (latitude first, longitude second). 第二优先级（确保准确率）： 比例尺大小比较及其与范围、内容详略的关系；等高线地形图五种部位的判读（尤其是山脊与山谷的区分：“凸低为脊，凸高为谷”）；指向标地图的方向判读（平移法的操作）。 Second priority (make sure it is correct): comparing scale size and how it relates to area and detail; reading the five parts of a contour map (especially telling ridges and valleys apart: "bend to low means ridge, bend to high means valley"); and reading direction on maps with a direction marker (using the moving method). 第三优先级（理解即可）： 地球形状认识过程的事件排序；地球大小的三个数据；图例识别；数字地图的优势；地理实践三种方式的概念与侧重。 Third priority (just understand): putting the events in the history of understanding Earth's shape in order; the three numbers for Earth's size; recognizing legend symbols; the advantages of digital maps; and the ideas and main areas of the three kinds of geographic practice. 高频易错点提醒： Common easy-to-miss points: 东西半球分界是20°W和160°E，不是0°和180°。 The Eastern and Western Hemispheres are divided by 20°W and 160°E, not 0° and 180°. 经线指示南北，纬线指示东西，不要记反。 Lines of longitude show north-south, and lines of latitude show east-west. Do not mix them up. 比例尺是分数，分母越大比例尺越小，不要按整数大小直觉判断。 A scale is a fraction. The bigger the bottom number, the smaller the scale. Do not judge by whole-number size. 山谷等高线向高处凸出，山脊向低处凸出。 Valley contour lines bend toward the high side, and ridge contour lines bend toward the low side. 地轴是假想的轴，不是真实存在的。 Earth's axis is an imaginary line. It does not really exist. 南北半球分界是赤道，东西半球分界是经线圈，不要混淆。 The Northern and Southern Hemispheres are divided by the equator, and the Eastern and Western Hemispheres are divided by a longitude circle. Do not mix them up. 往期回顾： 只有勤奋学习，才能成为真正的学霸 教师节随想：为什么要教育孩子尊敬老师 10后的孩子，是幸福的一代，要努力学习 不要为足球自卑，请看中国人在本届国际数学奥林匹克竞赛成绩 高考是第三次分流，教育其实就是分流和筛选 学生时代应该努力读书，不要整天想着当作家能发大财 作为学生，首先应该努力读好书，其次才是玩
