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中班科学《猫鼠之战》优质公开课,附教案

  • 2026-04-07 07:04:58
中班科学《猫鼠之战》优质公开课,附教案

中班科学《猫鼠之战》

        设计意图:

   《猫鼠之战》是“身边的秘密”主题课程下的一节集体教学活动。在一次的户外散步时,孩子们玩起了踩影子的游戏,他们很好奇影子的变化。于是,我们顺应幼儿需求,生成了这节活动。整个活动通过创设“帮助老鼠用影子吓走大花猫”的情境,引导幼儿让影子变大变小,感受光源举例物体远近与影子大小的关系;让影子动起来,感光源角度与影子的关系;在最后的游戏升级中,通过让影子由一变多,变大变小,可移动,综合运用前期获得相关经验,让幼儿在亲身体验、实际操作中知道影子的变化与光和物体的位置有关,体验探索影子的乐趣。

   活动目标:

1.知道影子的的变化与光和物体的位置有关,在实验中获得对影子变化的经验。

2.体验探索影子的乐趣。

活动重难点:

知道影子的变化与光和物体的位置有关,在实验中获得对影子变化的经验。

活动准备:

大灯 1 个、四面操作板 5 个、手电筒 24 个、老鼠玩偶21 个、PPT 课件、KT 板 2 组

      活动过程:

   一、图片导入,激发兴趣

孩子们,今天来了两位熟悉的朋友,我们看看是谁啊?

它们到底谁更厉害呢?

老鼠想用它的神秘朋友来吓唬吓唬猫,我们看看这个神秘的朋友是谁?是的,就是老鼠的影子。

   二、帮助老鼠让影子变大变小——感受光源距离物体

远近与影子大小的关系老鼠影子这么小,小的都不行了,你觉得猫会害怕吗?那该怎么办呢?怎样能让影子变大呢?离得远影子不会变大吗?到底是不是像你们猜的那样的,后面给大家准备了操作台,每人找到一只老鼠,请你用手电筒对准小老鼠照一照,看看怎样让老鼠影子变大。不用搬椅子,从两边出发,开始行动。谁愿意来分享?你能边说边做吗?你们也是这样的吗?

   小结:光距离老鼠近,影子就会变大,距离老鼠远,影子就会变小。这么神奇呀!那我们赶紧把这个好方法告诉小老鼠吧!让它也试一试吧。

   三、帮助老鼠让影子动起来——感受光源角度与影子的关系

你觉得猫会就此放弃吗?它才不会呢?你听。

猫:“原来,老鼠用的是大影子。哼!我才不怕呢,反正影子就在那里,我要去把它的的影子踩到脚底下,我踩踩踩”。

猫说的什么?完了,这次老鼠肯定会输了,怎么办?为什么让影子动起来?怎么让它动起来呢?手电筒动起来,影子就能动吗?后面的操作板上有四个老鼠洞,看看能不能让你的老鼠影子动起来,还能回到四个洞里。谁成功了?请你来跟大家分享一下?

互动式小结:影子和手电筒的方向一样吗?他们是相对的。你们的小脑袋也太灵活了吧,小老鼠不知道有没有学会,哎呀,猫来了!猫要来踩影子了,快看!

   四、综合运用,经验提升——帮助老鼠让影子由一变多,变大变小,可移动

猫:“气死我了,这一次我一定要赢回来,不就是一个老鼠影子吗?有什么了不起,我不怕你”。猫说了什么?它说一只老鼠影子,它才不怕,孩子们怎么办呢?增加老鼠影子——老鼠影子分身术,听起来好厉害啊!怎么增加?要不要试一试?这次需要 4 位小朋友合作完成,同时站到一只老鼠的前面,看一看能不能变出 2 个或者更多老鼠的影子,影子要有大有小,动起来哦!

找到位置,开始行动吧。

请你们上来给大家演示一下。

哇,快来数数几个影子?有没有看大小不一的影子,它们可不可以动起来?真了不起!

互动式小结:你们是怎么做的?拿了几个手电筒,有几束光?你们 4 个手电筒是合在一起照的,还是分开的?为什么要分开?那怎样让老鼠的影子有大有小的呢?怎样让它们动起来的呢?

五、拓展经验——观看影子 72 变视频

小朋友们,今天我们一起帮助小老鼠用它的影子成功吓走了猫,影子不仅可以变大变小、动起来,还可以变出不同的造型呢,我们一起来看一看吧。

   活动延伸:

1.引导幼儿探究影子的其他秘密。

2.在区域中,投放光影相关的材料,幼儿进行游戏。

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  1. CONNECT:[ UseTime:0.000411s ] mysql:host=127.0.0.1;port=3306;dbname=a_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000588s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000302s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000273s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000495s ]
  6. SELECT * FROM `set` [ RunTime:0.000677s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000583s ]
  8. SELECT * FROM `article` WHERE `id` = 486483 LIMIT 1 [ RunTime:0.002949s ]
  9. UPDATE `article` SET `lasttime` = 1775991198 WHERE `id` = 486483 [ RunTime:0.000928s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000240s ]
  11. SELECT * FROM `article` WHERE `id` < 486483 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.002286s ]
  12. SELECT * FROM `article` WHERE `id` > 486483 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001534s ]
  13. SELECT * FROM `article` WHERE `id` < 486483 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000817s ]
  14. SELECT * FROM `article` WHERE `id` < 486483 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.006986s ]
  15. SELECT * FROM `article` WHERE `id` < 486483 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.004253s ]
0.126260s