化学是一门以实验为研究手段的自然科学,在教学中自然会涉及到许多以演示实验为手段的教学活动,通过演示实验的声光色的效果,给学生生动直观鲜明的印象,它是一种传统并被广泛应用简洁生动的教学形式.演示实验是教师进行示范性操作,指导学生进行观察和思考的实验,具有明显的示范性、直观性、启 Chemistry is a natural science based on experiments. Naturally, teaching involves many teaching activities that demonstrate experiments as a means. By demonstrating the effects of experimental light and light colors, chemistry gives students a vivid and vivid impression that it is A traditional and widely used simple and vivid teaching forms.Demonstration experiment is a demonstration experiment for teachers to guide students to observe and think about experiments with obvious demonstration and intuition