化学是一门以实验为基础的学科.化学实验中那些瞬息变化的各种现象,令学生们感到新奇和兴奋,由此产生了直接兴趣,这是初中学生对化学更感兴趣的主要因素,但这种兴趣是短暂的.如何使这种兴趣持续下去,使学生对化学从有趣转化为乐学,这是我们每位化学教师,尤其是初三化学教师所应注意的问题. Chemistry is a discipline based on experimentation. The phenomena that change rapidly in chemistry experiments make students feel new and excited, and this has generated direct interest. This is the main factor that junior high school students are more interested in chemistry. But this interest is short-lived. How to sustain this interest and make students convert chemistry from fun to fun is something that every chemistry teacher, especially the junior chemistry teacher, should pay attention to.