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在初中物理教学中,因为地磁场的内容很抽象,所以学生很难理解,往往死记硬背结论。为此,教师可以采用模型法,将抽象的地磁场问题具体化,从而轻松解决教学中的这一难点。笔者下面对这一问题进行简要分析。一、实验预期效果1.形象直观地演示地球上任何一点的小磁针都指南北的现象。2.形象直观地揭示地球上任何一点的小磁针都指南北的原因——地磁场。3.形象直观地引导学生理解地磁南北极与地理南北极相反这一知识点。二、实验材料
In junior high school physics teaching, because the content of geomagnetic field is very abstract, so students are hard to understand, often rote memorization conclusion. To this end, teachers can use the model method to abstract the issue of geomagnetic field to concrete, so easily solve this difficult teaching. The author below a brief analysis of this issue. First, the expected effect of the experiment 1. Visual image to demonstrate any point on the earth’s small magnetic pin north of the phenomenon. 2. Visual image reveals that any small magnetic needle on the earth refers to the reason of North China - Earth’s magnetic field. 3. The image intuitively guide students to understand the magnetic north and south pole and geographical opposite point of this knowledge. Second, the experimental material