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湘教版高中《地理》必修Ⅰ第25页中,地球内部结构图如图1所示。其他版本的高中地理教科书也多采用这幅图。图1的优点是:地震波波速变化与地球内部结构变化一目了然,学生易懂。缺点是:近地面的几百千米范围内表达不清楚,这会对学生读图分析造成一定的误导,使其误读成莫霍面处地震波的传播速度也在加快。实际上,这与事实恰恰相反、而我们重点要了解的地
Xiang version of high school “geography” compulsory Ⅰ page 25, the Earth’s internal structure shown in Figure 1. Other versions of high school geography textbooks also use this picture more. The advantages of Figure 1 are: The change of the seismic wave velocity and the change of the internal structure of the earth are easy to understand. Disadvantages: the expression of hundreds of kilometers near the surface is not clear, which will cause some misleading students read the graph analysis, making it misunderstanding into the wave velocity at the Moho surface is also accelerating. In fact, this is exactly the opposite fact, and we focus on understanding