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跨学科获奖教案及课件:等高线地形图的运用——基于地理实践力的西溪大峡谷地形部位判读

  • 2026-03-30 02:12:34
跨学科获奖教案及课件:等高线地形图的运用——基于地理实践力的西溪大峡谷地形部位判读

等高线地形图的运用

——基于地理实践力的西溪大峡谷地形部位判读

知识目标:

1、学会计算两点的相对高度、学会判断坡度的陡缓、学会判断山谷、山脊地形部位。

2、结合等高线地形图了解局部地形特征,学会联系生活, 学习对生活有用的地理。

能力目标:通过实践了解地形对生产生活的影响,提高地理实践力。

上课,同学们明天上午我们就要去西溪大峡谷,今天在教室的所有同学都是八年级的同学,为了让同学们更加了解明天我们要去的旅游景点,做好安排,我们安排了这节研学课程,希望大家认真学,明天不仅能玩好还能学到知识,把知识带回来,也能玩的开心,玩得安全。

首先,让我们一起回忆初一上学期所学的地形的判读,相对高度的计算是什么?是较高点的海拔减较低点的海拔;那如何在等高线地形图上判断坡度的陡缓?等高线越稀疏,坡度越缓;等高线越密集,坡度越陡。以及如何判断山谷和山脊,等高线发生弯曲的地方,向高处凸出则为山谷,向低处凸出则为山脊,也就是高谷低脊。

明天我们要去的第一个景点就是黄金玻璃桥,我们一起来看一下景点介绍。接下来,一起看等高线地形图,谁能说一说玻璃桥的地形部位是什么?

师举起右手,微笑地邀请学生回答。

生:山谷。

师:山谷。谢谢,请坐

翻手示意。

师:景区介绍中,玻璃桥的高为128米,那请同学们动动脑筋,即使C取最小值460米,那玻璃桥最高也就40米,有没有128米高啊?没有。请计算玻璃桥AB与C点的相对高度。

应该是再20米~40米之间。

【转呈】

所以,有的时候对于商家的宣传,我们还是要保持清醒的头脑,在游玩的过程中要不要过于紧张,但是也要提高自身的安全意识。接下来我们就来回忆摩擦力的知识,摩擦力的是阻碍物体相对运动的力,主要受接触面的粗糙程度和压力的影响,要增大摩擦力可以增大压力、也可以增大接触面的粗糙程度。减少接触面的粗糙程度可以减少摩擦力。

游玩了玻璃桥后,我们进入了玻璃滑道站台,也就是第二个景点玻璃滑道。在进入玻璃滑道的过程中,要求游客佩戴手套、穿上特质的防滑裤。这是为什么呢?

因为可以______(“增加”或“减少”)接触面的粗糙程度,从而增加摩擦力。

游玩了玻璃滑道后,我们会到第三个景点,玻璃水滑道,想一想玻璃水滑道中水的作用是什么??因为可以______(“增加”或“减少”)接触面的粗糙程度,从而减少摩擦力。

【转呈】咦,有的要增加摩擦力,有的要减少摩擦力,这是为什么呢?

师停顿,调皮地说“注意要看等高线噢”

请你来回答

师:请坐你真是个善于思考的孩子

因为A处等高线密集,坡度较陡,B处等高线稀疏,坡度较缓。

【转呈】虽然水减少了滑道与橡皮艇之间的摩擦力,但是景区设计者可是经过深思熟虑才选择的这条滑道,你看图中A\B\C都是山谷,但是却选择了A放置玻璃水滑道,请从坡度的陡缓与安全性角度考虑,选择B处设置玻璃滑水道的原因?

师:是的,B处等高线稀疏,坡度较缓,玻璃水滑道与橡皮艇之间摩擦力小,坡度缓更安全。

【转呈】这些景点真好玩,可是我察觉到大家意犹未尽,最后我们还有一个猜一猜的题目,如果大家能猜对,我们明天就一起去。

[景点介绍景点4:极限滑草跑道,湖南省最长的极限滑草道,全场160多米,落差40多米。]不讲

看题,投资商说:“投资滑草道,你选好位置再告诉我。得是人多的地方、而且很容易就能看见,而且必须得看见!”

图中两条滑草道,你猜最后选择______(填①或②)推荐给了投资商。

【结束】今天我们一起学习了等高线在旅游景点中山谷部位的判断,相对高度的计算;坡度的陡缓等等高线的知识,希望大家将我们所学的知识运用到生活中,同时在研学过程中做个有心人,勤于思考、乐于探索。最后祝大家研学快乐。

板书设计:

等高线地形图的运用

一、相对高度

H=H高-H低

二、山谷、山脊

凸高为谷;凸低为脊

三、密陡疏缓

四、摩擦力

接触面的粗糙程度

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  1. CONNECT:[ UseTime:0.000352s ] mysql:host=127.0.0.1;port=3306;dbname=a_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000594s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000236s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000250s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000496s ]
  6. SELECT * FROM `set` [ RunTime:0.000244s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000541s ]
  8. SELECT * FROM `article` WHERE `id` = 469793 LIMIT 1 [ RunTime:0.014421s ]
  9. UPDATE `article` SET `lasttime` = 1775772080 WHERE `id` = 469793 [ RunTime:0.001084s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000232s ]
  11. SELECT * FROM `article` WHERE `id` < 469793 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.004267s ]
  12. SELECT * FROM `article` WHERE `id` > 469793 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000438s ]
  13. SELECT * FROM `article` WHERE `id` < 469793 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002369s ]
  14. SELECT * FROM `article` WHERE `id` < 469793 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.004292s ]
  15. SELECT * FROM `article` WHERE `id` < 469793 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.063387s ]
0.164141s