1.学生认知水平的分析本节课的授课对象为高二年级学生,经过高一年级的学习,他们已经具备了一定的生物学基础,在分析归纳和知识迁移等方面的能力也有较大的提升,学生的认知和理解水平较高。在物理学科方面,该阶段的学生已经学习了热力学第一定律和第二定律,所以在学习过程中,学生对物理学的一些定义能够很好的理解和转换。2.教学内容分析本节课为人教版必修三《稳态与环境》一书的第五章第二节,本节课以前,学生已经掌握了关于生态系统的基本知 1. Analysis of the level of students’ cognition The subjects of this class are high school sophomores. After the first year of advanced study, they already have a certain biological basis, and their abilities in analyzing and inducing knowledge and transferring knowledge are also greater Ascension, students’ cognition and understanding are higher. In physics, students in this phase have already studied the first and second laws of thermodynamics. Therefore, some definitions of physics can be well understood and transformed by students in the learning process. 2 teaching content analysis This lesson is the PEP 3 compulsory three “steady state and the environment,” a book Chapter II, Section II, before the class, students have mastered the basic knowledge of the ecosystem