各类实验有不同的目的、特点与功能。演示实验是以教师为主要操作者的示范实验。成功的演示实验常给学生留下鲜明的印象,使课堂气氛异常活跃,从而获得良好的教学效果。它主要是将研究的现象展现在学生面前,引导学生进行观察与思考,结合学生的讨论与教师的讲解来完成课堂教学任务,在这一过程中能较好地培养学生的观察能力、初步分析综合能力、抽象 Various types of experiments have different purposes, characteristics and functions. Demonstration experiment is a demonstration experiment with teachers as the main operator. Successful demonstration experiments often give students a distinct impression, so that the classroom atmosphere is very active, so as to obtain a good teaching effect. It is mainly to show the phenomenon of the study in front of students, to guide students to observe and think, combined with the students 'discussions and teachers to complete the task of classroom teaching, in this process can better develop students' observation ability, preliminary analysis Comprehensive ability, abstraction