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反思物理课中的小插曲
李海晶
课程教育研究, 2017 (25), p.181-182
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Title:
反思物理课中的小插曲
Author:
李海晶
Subjects:
设计与进行实验
;
物理
Is Part Of:
课程教育研究, 2017 (25), p.181-182
Description:
在
声现象一章中
有
这样一道题:
有
八个啤酒瓶,依次装
有
越来越多的水,某同学
在
敲击水瓶时,问音调的情况。这道小题我以为根本就不用讲,凭着这两年的经验,
在
学生简单的读题后,直接解释了原理:这是因为空气柱的振动造成的,所以水最少的瓶里空气柱最长且振动得最慢,音调就低。刚想接着讲下面的习题,可突然
有
个同学站起来:'
老
师,不是这样的.'听语气特别坚决。'这谁呀?'我心里想着,'这不捣乱吗?这马上就下课了,马上就要上间操,这不耽误事吗.'抬头一看,是我的课代表小君,'那
你
说说看.'我忍着不快慢慢地说。'
老
师,我觉得是瓶子的振动,因为
你
敲的是瓶子,那振动的怎么能是空气柱呢?'这话一出,可坏了,沉默了几秒钟后即而全班同学都沸腾了。几个班级理科'领军人物'也都纷纷站起来,对小君的意见表示大力支持。面对这种情况,我也犹豫了。正巧下课的铃声响了,于是,我把这一题作为继续探究的话题,把疑问留给了学生,也留给了自己。
Language:
Chinese
Identifier:
ISSN: 2095-3089
Source:
Alma/SFX Local Collection
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