化学是一门基础的自然学科,学生从初三开始接触化学知识,这不仅是学生学习化学知识的开始,也是为高中化学做好基础铺垫的重要时期。学生在高中阶段的化学学习与初中阶段相比有较大的差异,化学知识点更多,实验也更加复杂,很多学生会觉得化学学习较难。因此,教师要充分调动学生的兴趣,紧抓化学学科基础概念部分,按照从感性到理性的认知规律让学生充分理解化学概念,通过概念认知到 Chemistry is a basic natural science. Students have been exposed to chemistry knowledge since the third year. This is not only the beginning of students’ learning chemistry knowledge, but also an important period for the foundation of high school chemistry. Compared with junior high school students, the chemistry study in senior high school is quite different. There are more chemical knowledge points and experiments are more complicated. Many students feel that chemistry learning is more difficult. Therefore, teachers should fully arouse students’ interest, pay close attention to the basic concept of chemistry, and allow students to fully understand the concept of chemistry in accordance with the cognitive law from perceptual to rational, through concept recognition.