论文部分内容阅读
可乐瓶、矿泉水瓶等随处可见,一般人都把它当成废物随手扔掉。但在自然课教学和学校科技活动中,许多时候却是很好的实验材料。下面介绍它在自然课实验和科技活动中的几个应用。 一、大气压教学实验中的应用 在空矿泉水瓶的瓶盖上用锥子或尖剪刀钻一个小洞,洞的大小以刚好能穿过一根吸管为宜,在瓶盖与吸管的结合处滴上几滴502胶水。装置完成后(图一),可以做如下两个小实验:
Coke bottles, water bottles, etc. can be seen everywhere, most people treat it as waste readily throw away. However, in nature teaching and school science and technology activities, many times it is a very good experimental material. Here are some of its applications in natural class experiments and science and technology activities. First, atmospheric pressure in the teaching of experimental applications Bottles of empty mineral water bottle with a cone or sharp scissors to drill a small hole, the size of the hole to just pass through a straw appropriate, drop in the bottle cap and pipette Department A few drops of 502 glue. After the device is completed (Figure 1), you can do the following two small experiments: