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,0,时间是什么？,时间是什么？,1,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,时间是物质存在的客观形式，无处不在，与每个人密切相关，但它看不到、触不着。,记录时间的工具,状元成才路状元成才路状元成才路状元成才路状元成才路状元成才路,2,还有什么可以记录时间的更替？,还有什么可以记录时间的更替？,3,时间的脚印优质课ppt课件,4,时间的脚印优质课ppt课件,5,时间的脚印优质课ppt课件,6,时间的脚印优质课ppt课件,7,8,时间的脚印,8 时间的脚印,8,陶世龙,（,1929,），四川安岳县人，我国著名科普作家。,代表作品有,打开地下宝库的钥匙,揭开大地的秘密,地球的画像,火山和地震,多变的地球,等科普读物。,作者简介,陶世龙（1929），四川安岳县人，我国著名科普作家,9,本文选自,时间的脚印,（江苏教育出版社,1999,年版）。科普作家陶世龙毕业于北京大学地质系，参加工作后长期与地质学科打交道，在国家推动科学普及和科学大众化的倡导下，作者致力于科普写作，尤其是针对青少年的科普作品较多。这篇科普文章以记录时间的方式为切入点，向我们介绍了有关岩石的丰富而有趣的科学知识。,背景链接,本文选自时间的脚印（江苏教育出版社1999年版）,10,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,踪,迹（ ）,腐,蚀,（ ）,浑,浊,（ ）,山,麓,（ ）,粗,糙,（ ）,龟,裂（ ）,帷,幕（ ）,刨,刮（ ） 沟,壑,（ ）,楔,形（ ） 钟,鼎,文（ ） 海,枯,石烂（ ）,zn,jn,co,sh,wi,bo,h,l,zhu,xi,dn,k,字词学习,状元成才路状元成才路状元成才路状元成才路状元成才路状元成才路,11,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,自由读课文，思考：课文主要介绍分析岩石记录时间的奇异功能，为什么不直接进入正题，而要先引用高士其的话？,课文精讲,时间伯伯，,你是最伟大的旅行家，,你从不犹豫你的脚步，,你走过历史的每一个时代。,高士其时间伯伯,状元成才路状元成才路状元成才路状元成才路状元成才路状元成才路,12,引用高士其的话把时间拟人化，一方面与主题照应，另一方面，通过引用，由生活时间引入地质时间，更切合读者实际生活，吸引读者。文题“时间的脚印”实际上是“从岩石上，可以看到时间的长短”的意思。,引用高士其的话把时间拟人化，一方面与主题照应，另一方,13,自由读,1-5,自然段，,说一说,：,1.,现在的人们是怎样记录时间的？,钟表和日历,2.,中国古代用什么来记录时间？,铜壶滴漏,3.,本文中提到的岩石有什么作用？,它是大自然用来记录时间的。,自由读1-5自然段，说一说：钟表和日历2.中国古代用什么来记,14,铜壶滴漏,水从一个铜壶缓缓地滴进另一个铜壶，时间过去了，这个壶里的水空了，那个壶里的水却又多了起来。时间是看不见的，但是我们用水滴记下了逝去的时间。,小知识,铜壶滴漏 水从一个铜壶缓缓地滴进另一个铜壶，时间过去了,15,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,自由读,6-21,自然段，分组讨论：,1.,岩石的,运动规律,是什么？,被破坏,被搬运、被堆积,重新生成岩石,状元成才路状元成才路状元成才路状元成才路状元成才路状元成才路,16,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,2.,你能根据书上的有关内容概述石烂到新生的过程吗？,岩石,小石子,沙砾、泥土,新岩石,沉淀,重压,胶结,状元成才路状元成才路状元成才路状元成才路状元成才路状元成才路,17,自由读,22-29,自然段，分组讨论：,1.,岩石是怎样保存历史痕迹的？,可从,岩石结构,、,石头颜色,、,生物化石,等方面去考虑。,岩石结构,反映地壳的活动,石头颜色,反映远古的气候,生物化石,反映历史的发展,自由读22-29自然段，分组讨论： 可从岩石结构、石头,18,2.,岩石保存了哪些历史的痕迹？,地壳的活动；,气候的变化；,古代生物的状况；,地球历史的发展过程；,自然界转瞬即逝的活动。,2.岩石保存了哪些历史的痕迹？地壳的活动；,19,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,3.,人类是怎样根据岩石来认识地球的发展历史的？,根据不同类型的化石去思考。,三叶虫化石,“,寒武纪”,海洋宽广,大树木化石,“,石炭纪”,温暖潮湿,长毛兽化石,“,第四纪”,气候寒冷,状元成才路状元成才路状元成才路状元成才路状元成才路状元成才路,20,三叶虫化石,小知识,三叶虫化石小知识,21,细细品味最后一段，说一说：读懂岩石记录有什么重大意义？,不仅可以增加知识，而且可以探寻地下“宝藏”，更有无穷的大自然奥妙存在。,细细品味最后一段，说一说：读懂岩石记录有什么重大意义,22,快速通读课文，找一找：文中有些段落只有一句话但起着承上启下的作用。请找出几个这样的例子，并作简要分析。,5,、,7,、,18,、,22,、,24,、,27,快速通读课文，找一找：文中有些段落只有一句话但起着承,23,1.,岩石是怎样记录下时间的呢？（,5,）,承上启下，由人类记录时间的方式，引出岩石记录时间方式的探寻。,2.,真的有“海枯石烂”的时候。（,7,）,开启下文，说明岩石“毁灭”的过程。,3.,经过长期的重压和胶结，那些碎石和泥沙重新形成了岩石。（,18,）,总括上文，总结了岩石“毁灭”之后再度“新生”的过程。,1.岩石是怎样记录下时间的呢？（5）承上启下，由人类记录时间,24,4.,岩石保存了远比上面所说的多得多的历史痕迹。（,22,）,承上，收住有关岩石自身解体与新生的话；启下，解读下文有关岩石上的历史痕迹。,5.,从“死”的石头上，我们看到了地壳的活动。（,24,）,概括评价上一段的叙述内容。,6.,化石是历史的证人，它帮助我们认识地球历史的发展过程。（,24,）,承上文，化石的作用；启下文，说明化石是怎样帮我们认识地球历史的发展过程的。,4.岩石保存了远比上面所说的多得多的历史痕迹。（22）承上，,25,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,1,、狂风吹来了，洪水冲来了，冰河,爬,来了，碎石、沙砾、泥土被它们带着，开始了旅行。,排比句，生动的描绘了“狂风”“洪水”“冰河”等自然力的气势。“冲来了”“爬来了”也是一种拟人化的描述增强了“洪水”“冰河”的动感和目的性，表现了它们势不可挡的威力。,把“爬”字改成“流”字可以吗？为什么？,不好。用“爬”字，形象生动，而且显出移动的缓慢。,品析语言,状元成才路状元成才路状元成才路状元成才路状元成才路状元成才路,26,2,、不要认为岩石是坚固不坏的，它无时无刻不经受着从各方面来的攻击。,将“炎热的阳光”“严寒的霜雪”以及风雨等对岩石的破坏说成是攻击，仿佛是有意识的行为，这样就强化了他们与岩石的敌对性，形象的说明了岩石“无时无刻不经受着磨难”,3,、,越是笨重的石块越跑不远，越是轻小的沙砾越能旅行到遥远的地方,以,拟人化,的手法，写岩石被分解后的不同命运。这样写增强了事物的主动性或被动性，生动有趣,2、不要认为岩石是坚固不坏的，它无时无刻不经受着从各方面来的,27,岩石在最初生成的时候，像书页一样平卧着，一层层地叠在一起，最早形成的“,躺,”在最下面。,把“躺”字改成“铺”字好吗？为什么？,不好。“躺”字，与平卧呼应，用“躺”形容岩石的生成状态，化动为静，准确而又形象的说明了岩石的形成过程。,岩石在最初生成的时候，像书页一样平卧着，一层层地叠在,28,本文以充满智慧的笔触，娓娓而谈岩石能够记录时间的脚印的原因，记录的内容和人类读懂大自然这种记录的重大意义，以丰富的实例和富有启发性的语言，引起人们探索自然奥秘的兴趣。,主旨概括,本文以充满智慧的笔触，娓娓而谈岩石能够记录时间的脚印,29,拓展延伸,少壮不努力，老大徒伤悲。,一寸光阴一寸金，寸金难买寸光阴。,放弃时间的人，时间也放弃他。,时间就像海绵里的水，只要愿挤，总还是有的。,莫等闲，白了少年头，空悲切！,逝者如斯夫，不舍昼夜。,人们对时间感受的名言：,拓展延伸少壮不努力，老大徒伤悲。人们对时间感受的名言：,30,