“升华和凝华”是人教版《物理》八年级上册的一节内容,该节的重、难点是“升华和凝华的概念以及会分析升华和凝华的现象”。我在备课中注意到:无论从生理还是心理的条件来看:初中生的抽象思维能力比较弱,因此教师应在形成概念前使学生获得十分 “Sublimation and Condensation” is a section of the eighth edition of the “Physics” PEP. The emphasis and difficulty of this section are “the concept of sublimation and sublimation, and the phenomenon of sublimation and sublimation.” I noticed in lesson preparation: Regardless of their physiological or psychological conditions, junior high school students’ abilities to abstract thinking are rather weak. Therefore, teachers should make students obtain very good