论文部分内容阅读
大气有压力且压力来自四面八方是小学自然课的重要内容之一.因为我们人类生活在大气中间,要让学生认识到大气有压力且压力来自四面八方是有一定困难的.所以在上课时用大气压力演示器(如图)让学生观察到这个现象是十分必要的.制作大气压力演示器需要一个密封较好的透明盒子,6个小气球,1根2mm粗的乳胶管.1个自行车气门嘴,1个大注射器,1块薄铁片.制作时先在盒的上、下、左、右、前、后各打1个直径为10mm左右的孔.再用薄铁片做6个高
Atmospheric pressure and pressure from all directions is one of the important content of primary school nature class because of our human life in the middle of the atmosphere, to make students aware of the atmosphere there is pressure and pressure from all directions is a certain degree of difficulty.So in class with atmospheric pressure The demonstrator (pictured) made it very necessary for students to observe this phenomenon.An atmospheric pressure presenter required a well-sealed transparent box, six small balloons, a 2mm thick latex tube, a bicycle valve, 1 large syringe, a thin iron sheet.Prepared in the box first, down, left, right, before and after each play a hole diameter of about 10mm. And then thin iron plate to do 6 high