关于中学化学探究实验的研究

Study on the Exploratory Experiment in Secondary-school Chemistry

实验教学是化学教学中非常重要的环节,但在中学化学课本里有些实验的设计不够严密。本文根据笔者平时的实际教学,对探究实验“对人体吸入的空气和呼出的气体的探究”的两个步骤做出了改进,从而使实验更准确、更直观。

Experimental teaching is the key constituent in teaching of chemistry. In the textbook of chemistry,however, designs of some experiments are not accurate, such as the exploratory experiment ＂investigation of human breathing gas＂. According my hands - on of teaching,two procedures of this experiment were improved; the optimal experimental conditions are more accurate and visual than the former.