一、问题的提出“观察水的沸腾”实验是初中物理教学的重点,利用该实验可以说明水沸腾的规律。在现行的教材中,人教版和沪科版都是利用如图1所示的装置进行实验的,而北师大版和沪粤版则只是在此基础上将烧杯口上的盖子去掉了。但利用上述装置的弊端仍有很多:(1)所需器材多,组装麻烦;(2)为了更好地观察气泡的变化过程,实验时一般采用的是凉水,加之学生分组实验的烧杯容量大,造成实验时间 First, the issue put forward “observation of water boiling ” experiment is the focus of junior high school physics teaching, the use of the experiment can explain the law of boiling water. In the current teaching materials, PEP and Shanghai Science and Technology Bureau are using the device shown in Figure 1 to experiment, and Beijing Normal University version and Shanghai and Guangdong version just on the basis of the beaker lid removed. However, there are still many drawbacks of using the above device: (1) the required equipment is more complicated and the assembly is troublesome; (2) in order to observe the change process of the bubble better, cold water is generally used in the experiment, , Resulting in experimental time