中学化学知识大致可分为两大类 ,一是描述型知识 ,二是抽象型概括型知识。由于化学是一门实验科学 ,因此无论是描述型知识还是概括型知识 ,都对学生的思维活动的方式有着比较特殊的要求。不难看出 ,中学化学知识与学生已有知识经验基础、固有思维方式及习惯之间存在着不一致、? The middle school chemistry knowledge can be roughly divided into two categories, one is description type knowledge, and the other is abstract type generalization knowledge. Since chemistry is an experimental science, both descriptive and general knowledge have specific requirements for students’ thinking activities. It is not difficult to see that there is an inconsistency between the knowledge of middle school chemistry and the students’ existing knowledge and experience basis, and the inherent ways of thinking and habits.