科学探究是化学课程改革的突破口,在加强基础知识教学的同时,培养学生的科学态度,科学的学习方法,启迪学生积极思维,培养良好的思维习惯,提高思维能力,这是新课改的一个特征。然而,面对初中学生知识面窄,探究经验缺乏,加之教材中有的实验现象不是很明显,有的实验现象学生难解释,有的实验成功的几率小,所以在实验探究活动中,教师要对学生的认知规律进行准确地把握,根据学生 Scientific inquiry is a breakthrough in chemistry curriculum reform. While strengthening the teaching of basic knowledge, we should cultivate students ’scientific attitudes and scientific learning methods, enlighten students’ positive thinking, cultivate good thinking habits and improve their thinking ability. This is a new curriculum reform feature. However, in the face of the narrow knowledge of junior high school students, lack of exploration experience, combined with some experimental phenomena in the textbooks is not obvious, and some students are difficult to explain the phenomenon of the experiment, and some experiments less likely, so in the experimental exploration activities, teachers The rules of cognition of students to accurately grasp, according to the students