对《上教版九年级化学》中两则实验教学进行改进。二氧化碳的奇妙变化通过对实验装置的改进,一套装置即可将二氧化碳的很多性质体现出来;铵态氮肥的检验(研磨法)通过对实验操作环节的改进,借助实验中的明显实验现象及教师的恰当引导,使知识点化难为简,学生更易接受。 Improve the two experimental teaching in “Peking ninth grade chemistry”. The amazing changes of carbon dioxide through the improvement of experimental devices, a set of devices can be reflected in many of the nature of carbon dioxide; ammonium nitrogen fertilizer test (grinding method) through the improvement of experimental aspects of the experiment, with the obvious experiment in the phenomenon and teachers The proper guidance, so that knowledge is difficult to simplify, students are more acceptable.