拓展实验内容,就是不再局限于书本中原有和现成的实验,补充相关内容,适当延伸,以及对某些实验作深化处理。补充一些形式多样、富有趣味性的实验。当实验本身就具备较强的吸引力时,学生的动手欲望更容易被激发出来。在教学《声音的产生》中,让学生把蒙好塑料薄膜的扬声器浸入水 Expansion of the content of the experiment is no longer confined to the original and ready-made experiments in the book, supplementing the relevant content, extending appropriately, and deepening the processing of certain experiments. Add some diversified and interesting experiments. When the experiment itself has a strong appeal, the students desire to start more easily be stimulated. In teaching “Generation of Sound,” allow students to immerse plastic film loudspeakers into water