有关瓶“吞”鸡蛋实验的一点改进

• 作 者: 孙树红
• 机 构: 垦利县第二实验小学,
• 出 处: 山东教育
• 发表日期: 2016年Z1期
• 关键词: 引题 塞住 切人 饮料瓶 放掉 大气压力 四年

青岛版《科学》四年级上册教材中“瓶‘吞’鸡蛋的秘密”一课有一个引题实验——瓶“吞”鸡蛋。一个熟鸡蛋,剥去外壳,选择一个瓶口略小于鸡蛋“腰围”的瓶子,用火柴点燃一张纸,放到瓶中,然后迅速将剥了壳的熟鸡蛋小头朝下塞住瓶口,把瓶口堵严,不要漏气。鸡蛋会慢慢地被瓶子“吞”下去。在这个实验中,瓶口和鸡蛋的大小要合适,才能保证实验的成功。所以对鸡蛋的选择就提高了要求。要想瓶子“吐”出鸡蛋,就要二次实验,假如实验失败,

Qingdao version of “Science” in the fourth grade on the textbook “bottle” swallow the secret of the egg “lesson has a quotation test - bottle ” swallow “egg. A cooked egg, stripped the shell, select a bottle slightly smaller than the egg ”waist “ bottle, lit a piece of paper with a match, into the bottle, and then quickly peeled shell cooked egg head down Bottle, the bottle blocked, do not leak. Eggs will be slowly ”swallowed“ by the bottle. In this experiment, the size of the bottle mouth and eggs to be appropriate in order to ensure the success of the experiment. So the choice of eggs to improve the requirements. To the bottle ”spit " out of eggs, it is necessary to second experiment, if the experiment fails,