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初中生在刚学化学时,往往不知道如何观察探究实验。教师在刚开始进行探究实验教学时就有必要对如何进行实验观察给予学生正确的指导。1.全面观察。具有代表性、典型的实验探究活动,往往需要学生全面而系统地观察。首先应观察整个装置的轮廓,是由几个部分组成,观察这些部分由什么仪器组成,怎样连接;然后按试剂添加的顺序、数量和操作步骤进行观察,这三个内容往往是实验成败的关键;最后按“反应前,反应中,反应后”的顺序,
Junior high school students just learning chemistry often do not know how to observe the experiment. It is necessary for teachers to give students proper guidance on how to carry out experimental observation when they begin to explore experimental teaching. Comprehensive observation Representative, typical experimental inquiry activities often require students to observe it comprehensively and systematically. First of all, observe the outline of the whole device. It consists of several parts. Observe what instruments are composed of these parts, and how to connect them. Then observe the order, quantity and operation steps of adding reagents. These three contents are often the key to the success or failure of the experiment ; Finally press “before the reaction, the reaction, after the reaction ” in the order,