当前位置:首页>课件>课件分享 Vol.4|大班科学《让硬币浮起来》教案(免费附电子版教案+PPT+视频)

课件分享 Vol.4|大班科学《让硬币浮起来》教案(免费附电子版教案+PPT+视频)

  • 2026-05-08 19:56:11
课件分享 Vol.4|大班科学《让硬币浮起来》教案(免费附电子版教案+PPT+视频)

《让硬币浮起来》

大班·科学 

🌻活动背景

     大班孩子对沉浮的概念,基本都停留在“重的东西沉、轻的东西浮”这个阶段。你问他硬币放水里会怎样,全班都抢着说“沉下去”。但如果你接着问“有没有办法让它浮起来”,教室会突然安静三秒钟,然后开始叽叽喳喳出主意。

这份教案就是从这个“三秒钟的安静”开始的。先让孩子猜,再让他们动手试,最后自己发现:原来有些材料能帮硬币浮起来,有些材料自己浮着行带上硬币就沉了,还有的材料改变一下形状就能从沉变浮。

教案我放下面了,需要的老师直接看。

一、活动目标

1. 尝试用多种辅助材料让硬币浮起来,敢于猜、愿意动手验证。

2. 知道有些物体改变形状后能从沉变浮,学会在记录表上记下自己的实验结果。

3. 体验动手做实验的乐趣,对沉浮现象产生好奇。

二、活动准备

PPT课件、一元硬币每人一枚、记录表、彩笔、透明水盒(装清水)、塑料瓶盖、积木、纸船、泡沫、橡皮泥、抹布、抽纸。

三、活动过程

1. 从一枚硬币开始

拿出一枚硬币给孩子们看:“如果我把这枚硬币轻轻放进水里,它是沉下去还是浮起来?”

这个问题基本不会有悬念,孩子们都会说沉下去。老师现场验证,硬币果然沉到水底。然后接着问:“有没有什么办法,能让这枚硬币浮在水面上?”

2. 先猜猜,再动手

把准备好的辅助材料摆出来:积木、瓶盖、泡沫、纸船、橡皮泥。让孩子们先看一圈,猜一猜哪些材料能帮硬币浮起来,哪些不行。

发下记录表,和孩子们讲清楚怎么用:第一列是材料名字,第二列画自己的猜想(↑浮或↓沉),第三列留着写实验结果。

3. 第一次动手:哪种材料真能行?

孩子们轮流用每种材料试一遍,把结果记在第三列。老师不用急着纠正,让他们自己发现。

小建议:实验前提醒孩子们把袖子卷起来,每组下面垫一块抹布。水洒了别慌,擦一下就行。

实验结果一交流,孩子们自己就能总结出来:积木、大瓶盖、泡沫能托住硬币;小瓶盖自己浮着行,加上硬币就沉了;纸船一开始好好的,吸水多了就慢慢往下沉。

4. 第二次动手:橡皮泥能不能行?

先拿出一团球状橡皮泥,让孩子们猜它放水里会怎样。验证一下——球状橡皮泥直接沉下去。

然后问:“橡皮泥也想帮硬币浮起来,你们有办法吗?”

这次不给提示,让孩子们自己想办法。有的孩子会把橡皮泥压扁、捏成船形、边缘翘起来,轻轻放在水面上,再把硬币小心放上去。

小建议:这一步是整节课最容易反复试错的环节。有的孩子要试三四次才能成功,别催,让他们自己调整。

请成功的孩子来分享,总结出几个关键点:橡皮泥要捏得薄薄的、边缘不能进水、轻轻平平地放水面、硬币放正中间。

5. 第三次动手:验证一下刚才的办法

让孩子们按照总结出来的经验重新做一遍,这次大部分孩子都能成功。橡皮泥还是那块橡皮泥,改变了一下形状,就从沉变成了浮,还能托起一枚硬币。

6. 生活里的沉浮

最后放一段小视频:铁块也能通过改变形状浮在水面上;生活中人们用木头、救生圈让自己浮起来;潜水艇为什么能浮又能沉?因为它可以自己吸水、排水。

四、活动延伸

科学区继续投放橡皮泥、硬币和各种材料,让孩子们接着探索。有兴趣的孩子可以试试用矿泉水瓶做简易潜水艇。

领取方式

需要这份《让硬币浮起来》电子版教案+配套PPT+实验视频的老师,关注【橙汁手工集】,在公众号对话框里回复关键词 “硬币” ,网盘链接自动发你。

不是在文章评论区留言哦,是关注后发消息的地方回复~

🍊 橙汁老师

一个看着孩子们把橡皮泥捏成小船终于成功时比他们还兴奋的幼师

往期推荐:

橙汁育儿说 Vol.3|毁掉孩子小学适应的,不是不会认字,是家长忽略的3件小事

橙汁手工集 Vol.8|幼儿园母亲节手工特辑:6款可操作的手工贺卡,步骤详细直接照着做

可打印素材 Vol.4|控笔连线练习:从画直线开始,专注力慢慢养出来

周一资源包 Vol.3|幼儿园母亲节活动方案,小中大班活动及亲子活动都有(配套资源合集文末免费领取)

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  1. CONNECT:[ UseTime:0.000565s ] mysql:host=127.0.0.1;port=3306;dbname=a_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000784s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000291s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000271s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000518s ]
  6. SELECT * FROM `set` [ RunTime:0.000198s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000590s ]
  8. SELECT * FROM `article` WHERE `id` = 501642 LIMIT 1 [ RunTime:0.000392s ]
  9. UPDATE `article` SET `lasttime` = 1778320887 WHERE `id` = 501642 [ RunTime:0.006050s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000385s ]
  11. SELECT * FROM `article` WHERE `id` < 501642 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.003433s ]
  12. SELECT * FROM `article` WHERE `id` > 501642 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000492s ]
  13. SELECT * FROM `article` WHERE `id` < 501642 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000967s ]
  14. SELECT * FROM `article` WHERE `id` < 501642 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000709s ]
  15. SELECT * FROM `article` WHERE `id` < 501642 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.007163s ]
0.093531s