苏教版《科学》四年级上册第一单元第1课“空气占据空间吗”的实验设计如图1所示。这个设计的不足之处在于观察“空气把空间腾出来,水上升纸浸湿”的过程缺乏直观性和可操作性,笔者为了克服以上不足,对实验进行了如下改进,如图2所示。其操作过程为:(1)竖直把玻璃瓶放入水中,水 Sujiao version of “Science” fourth grade on the first volume of the first unit “air-occupied space,” the experimental design shown in Figure 1. The shortcomings of this design is to observe the “air space to make up, the water up the paper soaked” process lacks intuitiveness and maneuverability, the author in order to overcome the above deficiencies, the experiment was improved as shown in Figure 2. The operation process is: (1) put the glass bottle into the water vertically, water