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一、透彻理解基础知识,注重知识体系的构建1．夯实基础知识,突出知识重点,明确主攻方向。在分析经线和纬线特点时,要充分利用“地球形状和大小图”,结合地球仪演示分析地球形状对经线、纬线特点的影响,帮助学生形成正确的空间想象能力。在研究经纬度的变化规律时,要充分利用“纬线和纬度图”、“经线和经度图”、“经度的变化图”、“纬度的变化图”进行分析。在进行球面距离、纬线长度、地球自转线速度等的计算时,要利用“纬度度量图”、“经度度量图”,使学生直观了解经度、纬度在立体图上的表示方法等,强化学生空间概念的培养。
First, thoroughly understand the basic knowledge, and pay attention to the construction of the knowledge system. Strengthen the basic knowledge, highlight the focus of knowledge, clear the main direction. When analysing the characteristics of warp and weft, we should make full use of the “shape and size of the earth” and combine the use of a globe to analyze the influence of the shape of the earth on the characteristics of warp and weft to help students form the correct spatial imagination. When studying the variation of latitude and longitude, we should make full use of “latitude and longitude maps,” “longitude and longitude maps,” “longitude changes,” and “latitude changes.” In the calculation of the spherical distance, the length of the weft, the rotational speed of the earth, etc., it is necessary to use the “latitude measurement chart” and the “longitude measurement chart” to allow students to intuitively understand the representation of longitude and latitude on the three-dimensional map, and to reinforce the concept of student space. Training.