初中化学要求学生掌握一些基本的化学知识、简单的化学计算、基本的化学实验技能及化学在生活生产的某些应用。其知识层次对学生的要求比较简单,学生通过记忆和简单模仿基本均能掌握。而高中化学与初中化学相比无论是教学目标还是知识体系均发生了很大变化,知识容量和难度大为提高,对学生的自学能力、探究能力、归纳整合能力、应用能力、创新能力等均提出了更高层次的要求。事实也是如此,很多高一新生入学后感觉到高中 Junior high school chemistry requires students to master some basic chemical knowledge, simple chemical calculation, basic chemical experiment skills and some applications of chemical production in life. The level of knowledge required by students is relatively simple, students can grasp basic memory and simple imitation. However, both high school chemistry and junior high school chemistry have undergone great changes in both the teaching goal and the knowledge system, and the knowledge capacity and difficulty have been greatly improved. The self-learning ability, inquiry ability, inductive integration ability, application ability and innovation ability of students Proposed a higher level of requirements. The same is true, many high school freshmen feel high school