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类读一读第4自然段,你发现了哪些有,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,海,参,靠肌肉伸缩爬行,,每小时,只能前进,四米,。,参,_,人参,_,参加,shn,cn,_,参差不齐,cn,mazhiweimazhiweimazhiweimazhiw,有一种鱼身体像梭子,每小时能游几十千米,攻击其他动物的时候,,比普通的火车还快,。,有一种鱼身体像梭子,每小时能游几十千米,攻击其他动物,章 鱼,乌 贼,章 鱼乌 贼,贝 类,贝 类,课文从哪些方面描写了海底植物的差异?,色彩 大小,读一读第,5,自然段,思考:,课文从哪些方面描写了海底植物的差异?读一读第5自然段,思考:,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,它们的色彩( ),有褐色的,有紫色的,还有红色的。,色彩,多种多样,mazhiweimazhiweimazhiweimazhiw,部编新版三年级下册第23课海底世界教学ppt课件,大小,单细胞海藻,海藻,大小单细胞海藻海藻,海底有什么矿产资源?,煤、铁、石油和天然气,还有稀有金属。,快速读第,6,自然段,说一说:,海底有什么矿产资源?快速读第6自然段,说一说:,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,结构梳理,海底世界,总起,大海深处是什么样的,分述,动物,植物,总结,丰富的资源,生命的摇篮,矿藏,发光的深水鱼,窃窃私语,活动方法各异,色彩多种多样,大小相差很大,蕴藏丰富,景色奇异 物产丰富,mazhiweimazhiweimazhiweimazhiw,课堂小结,课文通过介绍海底世界的奇异景象和丰富资源,说明了海底是个景色奇异、物产丰富的世界,激发我们,热爱大自然,,,探索大自然奥秘,的兴趣。,课堂小结 课文通过介绍海底世界的奇异景象和丰富资源,说,拓展延伸,对科学对未来的大胆设想,海底生物能在如此恶劣多变的环境下生存下来,那么在火星上,甚至其他星球上是不是也可能有生物?,如果能深入研究这些生物,人类是否有可能在别的星球上生存?,拓展延伸对科学对未来的大胆设想海底生物能在如此恶劣多变的环境,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,mazhiwei,海底是否还蕴藏着我们不知道的巨大能量?,海洋生物这种适应环境的方式是否给了我们什么灵感呢?,mazhiweimazhiweimazhiweimazhiw,随堂练习,一、看拼音,写词语。,wi xin hi shn,( ) ( ),xn s hu tu,( ) ( ),危险,海参,迅速,后退,随堂练习一、看拼音,写词语。wi xin hi,二、把海底动物和它们的活动特点连接起来。,海参,梭子鱼,贝类,乌贼和章鱼,每小时能游几十千米,靠肌肉伸缩爬行,利用水的反推力迅速后退,巴在轮船底下旅行,二、把海底动物和它们的活动特点连接起来。海参每小时能游几十千,三、拓展阅读。,与大海有关的诗句:,乘风破浪会有时,直挂云帆济沧海。,李白,行路难,春江潮水连海平,海上明月共潮生。,张若虚,春江花月夜,三、拓展阅读。与大海有关的诗句:,课后习题参考答案,朗读指导:本文形象地介绍了景色奇异、物产丰富的海底世界,朗读时注意用轻松上扬的语调和亲切欣喜的语气来读。,朗读课文。说说课文是从哪几个方面介绍海底世界的。,课后习题参考答案 朗读指导:本文形象地介绍了景色奇异、,参考答案:课文是从海底动物的声音和活动方法、植物、矿藏这几个方面来具体介绍海底世界的。,参考答案:课文是从海底动物的声音和活动方法、植物、矿,在课文中找找下面的句子在哪个自然段,说说那段话是怎样把这个意思写清楚的。,海底的动物,各有各的活动方法。,参考答案:这个句子在文中第四自然段,这一句是这段话的总起句,后面的内容分别运用了列数字、作比较等说明方法,从速度的快慢、运动的方式来介绍海底动物的活动方法各不相同。,在课文中找找下面的句子在哪个自然段,说说那段话是怎样把这个意,海底的植物差异也很大。,参考答案:这句话是课文第五自然段的总起句,后面的内容运用了举例子、列数字和作比较的说明方法,从色彩的多种多样和大小相差很远来讲述海底植物的差异很大。,海底的植物差异也很大。 参考答案:这句话是课文第五自然,读一读,注意加点的部分,体会这样写的好处。,海底的动物常常在窃窃私语。,还有些贝类自己不动,却能巴在轮船底下做免费的长途旅行。,.,.,.,.,.,.,.,.,.,.,.,读一读,注意加点的部分,体会这样写的好处。海底的动物常常在窃,参考答案:“窃窃私语”“免费的长途旅行”都是把海底的动物当作人来写,这样写既生动形象,又让文章富有趣味,激发读者丰富的想象。,参考答案:“窃窃私语”“免费的长途旅行”都是把海底的,阅读有关海洋知识的材料,通过各种途径深入探究,比如阅读科普类作品:,少年百科全书,十万个为什么,等,还可以从电影、电视、光碟、网络中搜寻。为开展“我了解的海底世界”读书交流活动做准备。,课后作业,阅读有关海洋知识的材料,通过各种途径深入探究,比如阅,
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