九年级化学上册6.1燃烧与灭火省公开课一等奖新名师优质课获奖课件.pptx

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,*,关闭阀门,盖上锅盖,1/54,2/54,3/54,4/54,5/54,6/54,7/54,8/54,9/54,10/54,11/54,12/54,13/54,14/54,15/54,16/54,练习,1,：以下情况所采取灭火方法，不恰当是（,）,炒菜时油锅着火，马上盖上锅盖,酒精灯不慎打翻起火，用湿抹布扑盖,电器因短路起火时，用水浇灭,用干粉灭火器扑灭汽油等火灾,C,17/54,2.,生煤火时，先引燃纸和木材，纸比煤易燃烧原因是（）,A.,纸比煤与空气接触面积大,B.,纸比煤着火点高,C.,纸比煤着火点低,D.,纸比煤密度小,C,18/54,19/54,20/54,21/54,22/54,可能发生爆炸气体组合：,可燃气和助燃气,如：氢气和氧气（空气）；,液化气和氧气（空气）；,煤气和氧气（空气）。,23/54,24/54,25/54,26/54,27/54,28/54,29/54,30/54,31/54,32/54,33/54,34/54,35/54,36/54,37/54,38/54,39/54,40/54,41/54,42/54,43/54,44/54,45/54,46/54,47/54,48/54,49/54,50/54,51/54,52/54,53/54,将细铜丝编成网,放在蜡烛火焰上方，烛焰被切断，造成这种现象原因是什么？,趣味小试验：,54/54,