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关于“黄赤交角及影响”一节教学在讲地球绕日作公转运动时,重点应突出:由于黄赤交角的存在,引起太阳直射点在地球上南北回归线之间作往返移动,进而引起一系列地理现象。学生对太阳直射点为什么只在地球上南北回归线之间移动的问题,较难理解。为此,我在教学中按以下几个步骤进行讲述: 首先:提出①由于地球自转产生了赤道平面;②出示地球仪讲:地球公转时有两个重要特点。其一:地球公转时地轴与黄道面之间成66°34′的夹角;其二:地轴在宇宙间的方向,不因季节而变化。结论:由于地球的自转和公转产生了黄赤交角
With regard to the teaching of “The Yellow Cross and the Influence”, the focus should be highlighted when talking about the Earth’s orbit around Japan: due to the existence of the yellow cross, the sun’s direct point is caused to move back and forth between the North and South Tropics of the Earth. A series of geographical phenomena. It is difficult for students to understand why the sun’s direct point only moves between the North and South Tropics of the Earth. To this end, I follow the following steps in my teaching: First, I propose that due to the rotation of the Earth, an equatorial plane is created; (2) There are two important characteristics when the earth is orbited. One: The angle between the Earth’s axis and the ecliptic plane is 66°34′ when the Earth orbits. Second, the direction of the Earth’s axis in the universe is not changed by the season. Conclusion: Due to the rotation and revolution of the earth