论文部分内容阅读
生活中,我们常用酸和碱来分辨物质的性质,什么是酸?什么是碱?酸性物质和碱性物质有什么主要特点,如何来分辨酸和碱?酸性物质和碱性物质对我们的生活会有什么影响?面对以上问题,我和学生进行了一系列的科学探究活动,并在探究过程中出现了意想不到的结果。1.结果一:老师,我的手为什么变成蓝色了?铃……上课铃响了,我问学生:“看过魔术表演吗?有什么感觉?最近老师学会了一个小魔术,想表演给同学们看,你们愿意看吗?”然后出示一张白色的面巾纸,用滴管往面巾纸上滴“水”。当学生感到很惊奇时,问学生:“你有什么发现?能提出什么问题?”
In life, we often use acid and alkali to distinguish the nature of the material, what is the acid? What is the alkali? What are the main characteristics of the acidic and basic substances, how to distinguish the acid and alkali? The acidic and basic substances to our life In the face of the above problems, I conducted a series of scientific inquiry activities with students and unexpected results came out in the process of inquiry. 1. Result 1: Teacher, why did my hand turn blue? The bell ... The bell rang and I asked the student: “Have you seen the magic show? What do you feel? Recently, the teacher learned a little magic and wanted to perform Show your classmates, would you like to see it? ”Then show a white facial tissue and drip“ water ”on the tissue with a dropper. When the student is very surprised, ask the student: “What did you discover and can ask what problem?”