教材分析《昼夜交替现象》是教育科学出版社小学科学六年级上册第四单元《地球的运动》中的第一课时,是小学阶段学习天体地球的起始课。昼夜现象的形成跟太阳光的照射,地球是不透明的球体,球体不断自转三个因素相关。一部分学生能够认识到这些,但大多数学生还不能。本课主要让学生展示他们对昼夜现象的看法。通过本节课的学习,并不要求学生知道昼夜交替的真正原 Textbook Analysis “The phenomenon of alternating day and night” is the first lesson of the “Earth’s Movement”, the fourth unit of the sixth grade of elementary education in Science Press. It is the initial lesson of learning the celestial globe in primary school. The formation of the phenomenon of day and night with the sun’s rays, the Earth is opaque sphere, the ball is constantly rotating three factors. Some students recognize these, but most students still can not. This lesson mainly shows students how they feel about the day and night. Learning through this lesson does not require students to know the true nature of day and night alternation