《空气占据空间》教学实录与点评

Teaching Record and Comments on Air Occupying Space

《空气占据空间》是大象版《科学》教材三年级上学期第四单元"流动的空气"中的第1课。《空气占据空间》一课引导学生基于以前学习过的空气知识,进一步认识空气的性质,为后续学习空气的用途、空气的流动等内容奠定基础。由于空气是看不见的物体,学生无法直观观察空气的变化,因此,他们建构空气占据空间的科学概念面临一定的挑战。教师要引导学生在原有知识的基础上,利用有结构的材料进行观察、实验,通过对实验现象的分析、讨论、相互启发和交流,建构空气占据空间的概念。

"Air occupies space"is the first lesson in unit 4"flowing air"in the first semester of grade 3 of science textbook of elephant edition.The lesson"air occupies space"guides students to further understand the nature of air based on the previously learned air knowledge,so as to lay a foundation for subsequent learning of air use,air flow and so on.Because air is an invisible object,students can not directly observe the changes of air.Therefore,they face some challenges in constructing the scientific concept of air occupying space.Teachers should guide students to observe and experiment with structured materials on the basis of original knowledge,and construct the concept of air occupying space through the analysis,discussion,mutual inspiration and communication of experimental phenomena.