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各位同学,大家好。还记得上学期我们研究热空气上升吗?当时我们是剪了一个纸蛇🐍,并且下面放上点燃的蜡烛,蜡烛加热了它周围的空气,推动了纸蛇转动起来。古今中外,也有很多应用热空气的例子,比如孔明灯,热气球等。今天我们一起来做个简单的热气球🎈玩玩吧。
","type":1},{"text":"我们需要的材料有:一张白纸,透明胶条,薄垃圾袋一个,能吹热风的吹风机。
","type":1},{"img_height":1600,"img_url":"https://ss-mpvolc.meipian.me/users/19914725/a171bed8abda43159c392770f36a709c__jpg.heic","img_width":1200,"type":1},{"img_height":900,"img_url":"https://ss-mpvolc.meipian.me/users/19914725/6058623be3084ea1b9dbbdcba5f5f8e2__jpg.heic","img_width":1200,"type":1},{"img_height":554,"img_url":"https://ss-mpvolc.meipian.me/users/19914725/86e9ed1c8f8d4c628e1231f6435d0db3__jpg.heic","img_width":1200,"type":1},{"img_height":430,"img_url":"https://ss-mpvolc.meipian.me/users/19914725/957a31cc47504dc6902a31fe2a5a0b4d__jpg.heic","img_width":430,"type":1},{"img_height":1600,"img_url":"https://ss-mpvolc.meipian.me/users/19914725/d27e5501c35a4c7693ab25471cd5dbfd__jpg.heic","img_width":1200,"text":"下面我们先折纸,选取一条纸,两端用胶条粘好,做成一个环。
","type":1},{"img_height":1600,"img_url":"https://ss-mpvolc.meipian.me/users/19914725/2ae81c79ac61455d816547fde5c67dc7__jpg.heic","img_width":1200,"text":"接下来我们把塑料袋打褶,粘在纸环上,像百褶裙那样粘一圈,不要留缝隙。
","type":1},{"img_height":1600,"img_url":"https://ss-mpvolc.meipian.me/users/19914725/f9ab9dcc0c754f2dbaed223ad52c32a0__jpg.heic","img_width":1200,"type":1},{"img_height":366,"img_size":1935,"img_url":"https://ss-mpvolc.meipian.me/users/19914725/26ce0804a0ec430288e0cccd8efcd7e9.gif","img_width":550,"text":"嗯嗯,现在热气球做好了,我们用手扶好纸环部分,将热风对着口,等热风充满了气球,就可以放手啦!试一试,看谁的热气球飞得好。
","type":1},{"text":"热气球的基本原理是空气热胀冷缩和浮力原理。当空气受热膨胀后,温度高的空气比温度低的空气更轻,密度会变小,故球囊内的空气变轻而受到浮力,这样就使热气球载重升空。
希望放飞的热气球能够让大家暂时摆脱电子产品,让你的思绪和梦想一起飞一会儿吧!
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","type":1},{"text":"我们需要的材料有:一张白纸,透明胶条,薄垃圾袋一个,能吹热风的吹风机。
","type":1},{"img_height":1600,"img_url":"https://ss-mpvolc.meipian.me/users/19914725/a171bed8abda43159c392770f36a709c__jpg.heic","img_width":1200,"type":1},{"img_height":900,"img_url":"https://ss-mpvolc.meipian.me/users/19914725/6058623be3084ea1b9dbbdcba5f5f8e2__jpg.heic","img_width":1200,"type":1},{"img_height":554,"img_url":"https://ss-mpvolc.meipian.me/users/19914725/86e9ed1c8f8d4c628e1231f6435d0db3__jpg.heic","img_width":1200,"type":1},{"img_height":430,"img_url":"https://ss-mpvolc.meipian.me/users/19914725/957a31cc47504dc6902a31fe2a5a0b4d__jpg.heic","img_width":430,"type":1},{"img_height":1600,"img_url":"https://ss-mpvolc.meipian.me/users/19914725/d27e5501c35a4c7693ab25471cd5dbfd__jpg.heic","img_width":1200,"text":"下面我们先折纸,选取一条纸,两端用胶条粘好,做成一个环。
","type":1},{"img_height":1600,"img_url":"https://ss-mpvolc.meipian.me/users/19914725/2ae81c79ac61455d816547fde5c67dc7__jpg.heic","img_width":1200,"text":"接下来我们把塑料袋打褶,粘在纸环上,像百褶裙那样粘一圈,不要留缝隙。
","type":1},{"img_height":1600,"img_url":"https://ss-mpvolc.meipian.me/users/19914725/f9ab9dcc0c754f2dbaed223ad52c32a0__jpg.heic","img_width":1200,"type":1},{"img_height":366,"img_size":1935,"img_url":"https://ss-mpvolc.meipian.me/users/19914725/26ce0804a0ec430288e0cccd8efcd7e9.gif","img_width":550,"text":"嗯嗯,现在热气球做好了,我们用手扶好纸环部分,将热风对着口,等热风充满了气球,就可以放手啦!试一试,看谁的热气球飞得好。
","type":1},{"text":"热气球的基本原理是空气热胀冷缩和浮力原理。当空气受热膨胀后,温度高的空气比温度低的空气更轻,密度会变小,故球囊内的空气变轻而受到浮力,这样就使热气球载重升空。
希望放飞的热气球能够让大家暂时摆脱电子产品,让你的思绪和梦想一起飞一会儿吧!
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