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化学是一门实验学科,化学实验能够直观、形象及真实地向学生展示化学反应,帮助学生内化化学知识。尤其对于高中学生而言,化学实验适合其当前的形象思维特征。为了能够使化学实验现象更加鲜明,可应用对比实验教学模式,在实验对比中观察及理解化学知识,进而提高课堂教学效率。本文通过实例分析空白对比、相互对比、条件对比等三种对比实验教学。一、空白对比空白对比指分为观察组与对照组,而对照组并不需要进行实验处理。简而言之,就是不给予实验条件与观
Chemistry is an experimental discipline where chemistry experiments can intuitively, vividly and vividly show students chemical reactions and help students to internalize chemical knowledge. Especially for high school students, chemistry experiments fit their current image-thinking characteristics. In order to be able to make the phenomenon of chemical experiments more vivid, comparative experimental teaching mode can be applied to observe and understand the chemical knowledge in experimental comparison, so as to improve the efficiency of classroom teaching. In this paper, examples of comparative analysis of blank contrast, contrast and other conditions of three comparative experimental teaching. First, the blank contrast Blank refers to the observation group and the control group, while the control group does not require experimental treatment. In short, do not give experimental conditions and observations