人教社义务教育六年制小学自然第五册《空气占据空间》一课的实验2是这课教学的关键 ，但教材中第2个实验的设计却因直观性差，很难达到预定的教学目标。原来的设计是这样的。（如图1）。第一步：拿一只瓶子，瓶口塞紧带漏斗的瓶塞，把水倒进漏斗。观察：水能流进瓶子里吗 ？第 People teach the compulsory education six years of primary school nature fifth volume “air occupy space” experiment 2 is the key to teaching this lesson, but the teaching of the first two experimental design because of poor intuitive, it is difficult to achieve the intended teaching aims. The original design is like this. (Figure 1). The first step: take a bottle, the bottle stopper plug the funnel, pour the water into the funnel. Observation: water can flow into the bottle? No.