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幼儿园中小班科学《会生气的河豚》PPT、教案、记录表

  • 2026-04-22 02:00:51
幼儿园中小班科学《会生气的河豚》PPT、教案、记录表

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会生气的海豚

幼儿园中小班科学

PPT、教案

活动名称:

“生气”的河豚

活动目标:

1.认知目标:初步感知小苏打和白醋混合会产生气体(二氧化碳),使气球膨胀。

2.技能目标:练习使用漏斗、倒液体、套气球等精细动作。

3.情感目标:通过实验观察化学反应的现象,激发好奇心。结合河豚“鼓气”的习性,增强科学实验的趣味性。

活动准备:

小苏打、白醋、塑料瓶口/小漏斗(或纸卷成漏斗状、气球、皮筋(固定气球用)、彩笔(黑色红色等)、手指套

活动过程:

1. 情境导入

教师:“小朋友们昨天我听到一个有趣的谜语,我想考考你们看你们能猜出来吗?

幼儿:“我们肯定能猜出来。”

教师:“那现在我告诉你们这个谜语,请仔细听。

小小身子圆鼓鼓,

游在水里小鼓,

带刺藏毒水中住,

遇到危险鼓成球。

幼儿:“我知道!我知道!是河豚。”

教师提问:“小朋友们,你们见过河豚吗?它遇到危险时会怎么做?

幼儿:“见过,遇到危险的时候它会鼓起来。”

教师:“今天我们要用气球做一个'会生气的河豚’,看看它怎么变胖!”演示实验现象

提前做好一个膨胀的“河豚气球”,让孩子们观察并猜测原因。

教师:“小朋友们你看见了什么?

幼儿:“我看见气球鼓起来了。”

教师:“没错,我们的气球河豚受到攻击后,自己就鼓起来了。小朋友们想知道为什么吗?

幼儿:“想。”

2教师演示实验步骚介绍材料

教师:“我们今天用到的最神奇的材料就是小苏打、和白醋。那我们来看一看它们仍碰在一起会发生什么?”在盘子里放入小苏打,加入白醋。

幼儿:“我看见它们产生了泡泡。”

教师:“没错,小朋友观察的很仔细,小苏打和白醋碰在一起会'打架’产生泡沫。在产生泡沫的时候会放出一种看不见的气体,叫做二氧化碳。我们的河豚气球就是被这个气体给吹的鼓起来的。”

幼儿:“好神奇呀!

教师:“那小朋友们想不想来制作一只会生气的小河豚呢?

幼儿:“要。”

教师:“那接下来请小朋友们仔细看一看小河豚是怎么做的吧。”

教师:“我们第一步倒“神奇药水”白醋,将白醋倒入手指套,然后用小皮筋绑起来。第二步把气球套在塑料瓶口将装有神奇药水的手指套放进气球里。第三步舀两勺小苏打装入气球。最后一步把气球打结,然后用彩笔装饰,但是在装饰的时候要小心不要把里面的神奇药水压破喽。”教师制作示范,每一步进行讲解。

3. 幼儿分组实验操作

幼儿尝试动手操作,教师巡回指导。重点关注幼儿装材料及打结的步骤,提醒材料装的少的小朋友调整材料数量。

4. 课程总结

教师和幼儿一起回顾实验,教师:“你们的实验成果了吗?

幼儿:“成功了。”

幼儿:“失败了。”

教师:“我听见有小朋友成功了,也有小朋友失败了。你们都很棒哟坚持完成了整个实验,失败也没有关系,我们已经知道是怎么做的了,我会把剩下的材料投放到科学区,感兴趣的小朋友可以在区域开放的时候再试一试。”

教师:“那小朋友还记得,是那两样东西让河豚鼓起来的吗?

幼儿:“是白醋和小苏打。”

教师:“为什么白醋和小苏打会让河豚鼓起来呢?

幼儿:“因为它们在一起的时候要打架,有泡泡,很生气,就很多很多的气跑出来。

教师:“哇,小朋友们直棒,已经难不倒你们了。小朋友们回家也可以带爸爸妈妈散这个小实验哟。但是能不能像白醋和小苏打一样打架呀?"

幼儿:“不可以。”

教师:“没错,我们不可以去打架,会让我们很生气也会受伤。”

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  1. CONNECT:[ UseTime:0.001038s ] mysql:host=127.0.0.1;port=3306;dbname=h_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001617s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000710s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000640s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001350s ]
  6. SELECT * FROM `set` [ RunTime:0.000558s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001499s ]
  8. SELECT * FROM `article` WHERE `id` = 486484 LIMIT 1 [ RunTime:0.002676s ]
  9. UPDATE `article` SET `lasttime` = 1776981300 WHERE `id` = 486484 [ RunTime:0.002921s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000606s ]
  11. SELECT * FROM `article` WHERE `id` < 486484 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001125s ]
  12. SELECT * FROM `article` WHERE `id` > 486484 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000987s ]
  13. SELECT * FROM `article` WHERE `id` < 486484 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.006966s ]
  14. SELECT * FROM `article` WHERE `id` < 486484 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.007784s ]
  15. SELECT * FROM `article` WHERE `id` < 486484 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.004281s ]
0.196502s