人教部编版二年级下册语文17 要是你在野外迷了路ppt课件（市优课021).ppt

1、,17.要是你在野外迷了路,要是你在野外迷了路,17,要是，如果的意思。“要是你在野外迷 了路”就是如果你在野外迷了路。,指南针：一种判别方位的简单仪器。指南针的前身是中国古代四大发明之一的司南。,知识备查,古代的司南,指南针,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,

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3、状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,要是你在野外迷了路， 可千万别慌张。 大自然有很多天然的指南针， 会帮助你辨别方向。,课文解读,慌张：,天然的指南针：,词语理解,心里不沉着，动作忙乱。,指大自然天生的，不是人工做成的。,。,要是你在野外迷了路, 可千万别慌张, 大自然有很多天然的指南针, 会帮助你辨别方向.,太阳是个忠实的向导, 它在天空给你指点方向: 中午的时候它在南边, 地上的树影正指着北方.,北

4、极星是盏指路灯, 它永远高挂在北方. 要是你能认出它, 就不会在黑夜里乱闯.,要是碰上阴雨天, 大树也会来帮忙. 枝叶稠的一面是南方, 枝叶稀的一面是北方.,雪特别怕太阳, 沟渠里的积雪会给你指点方向. 看看哪边的雪化得快,哪边化得慢. 就可以辨别北方和南方.,要是你在野外迷了路, 可千万别慌张, 大自然有很多天然的指南针 需要你细细观察,多多去想.,课文向我们介绍了（ ）、（ ）、（ ）和（ ）这几种天然的指南针。,太阳,北极星,大树,积雪,想 想 读 读,太阳是个忠实的向导， 它在天空给你指点方向： 中午的时候它在南边， 地上的树影正指着北方。,状元成才路,状元成才路,状元成才路,状元成才

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9、,太阳是个忠实的向导， 它在天空给你指点方向。,忠实,向导,请同学们结合生活实际说一说太阳是如何给我们指点方向的？,想 想 读 读,太阳是个忠实的向导， 它在天空给你指点方向： 中午的时候它在南边， 地上的树影正指着北方。,想 想 读 读,北极星是盏指路灯， 它永远高挂在北方。 要是你能认出他， 就不会在黑夜里乱闯。,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元

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11、成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,北极星是盏指路灯， 它永远高挂在北方。 要是你能认出它， 就不会在黑夜里乱闯。,北极星是盏指路灯,把北极星比作指路灯，形象地告诉我们在黑夜如何利用北极星识别方向。,想 想 读 读,要是碰上阴雨天， 大树也会来帮忙。 枝叶绸的一面是南方， 枝叶稀的一面是北方。,状元成才路,状元成才

12、路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才

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14、树也会来帮忙。 枝叶稠的一面是南方， 枝叶稀的一面是北方。,“大树”能给人帮忙，把树当成人来写，运用了拟人的修辞手法。,大树也会来帮忙,想 想 读 读,要是碰上阴雨天， 大树也会来帮忙。 枝叶绸的一面是南方， 枝叶稀的一面是北方。,稀,稠,思考：树叶的稀稠和阳光有什么关系？,树的枝叶稀稠和太阳光照射时间长短及照射量多少有关。树冠的南面受太阳光照射多，树叶茂密；北面由于受遮挡，光照较少，树叶长得稀。,稠 稀 南 北,想 想 读 读,要是碰上阴雨天， 大树也会来帮忙。 枝叶绸的一面是南方， 枝叶稀的一面是北方。,想 想 读 读,雪特别怕太阳， 沟渠里的积雪会给指点方向。 看看哪边的雪化得快，哪边化得慢。 就可以分辨南方和北方。,冬天，太阳从南边射过来，沟渠里的积雪朝南的一面受照射的时间长，化得快，积雪朝北的一面，太阳照射不到，雪化得慢。,雪化得快的一边是 , 化得慢的一边是 。,北边,南边,要是你在野外迷了路， 可千万别慌张， 大自然有很多