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会跳舞的红豆作文三年级300字

2022-10-12 02:33:05三年级397

会跳舞的红豆作文三年级300字

Place of common saying of no less than says " issue a river to know depth personally, personally tastes pear to know acid sweet. " want to understand a reason lucidly, have to do a test personally. This week, I and father mother did an interesting test together -- the ormosia that can dance.

正如俗话所说“亲身下河知深浅,亲口尝梨知酸甜。”想要透彻地明白个道理,就得亲自做实验。这个星期,我和爸爸妈妈一起做了个有趣的实验——会跳舞的红豆。

I look for a bag of an a bottle of a transparent glass, white vinegar, club, saleratus first, still have a few ormosia. I pour two spoon saleratus in the cup above all, the tap water with right amount rejoin, with small club agitate even, make sodium bicarbonate writes a composition entirely melt. Again a few for many times join white vinegar, it is OK to join a few ormosias finally. Await the time of ten seconds, ormosia comes happily in dance of the start in the cup unexpectedly, my agitato says to father mother: "I succeeded, I succeeded. I succeeded..

我先找来一个透明玻璃杯、一瓶白醋、一根木棍、一袋小苏打,还有一些红豆。我首先在杯子中倒两勺小苏打,再加入适量的自来水,用小木棍搅拌均匀,使小苏打全部融化。再少量多次的加入白醋,最后加入一些红豆就可以了。等待十几秒的时间,红豆竟开心地在杯子中跳起舞来,我兴奋地对爸爸妈妈说:“我成功了,我成功了。”

Why ormosia can dance! I cast interrogative eyes to mom. Mom tells me: "Sodium bicarbonate and white vinegar produce carbon dioxide gas, form bleb. Ormosia quality is light, volume is minor, bleb is adherent go up in ormosia, buoyancy is more than gravity, so ormosia arrives in the rise below the action of buoyancy fluid face. Rise arrives after fluid face, because be contacted with air, bleb burst, the flotage that ormosia gets is less than gravity, sink again a cup of bottom. Circulate repeatedly so, we saw meeting " dancing ormosia. We saw meeting " dancing ormosia..

为什么红豆会跳舞呢!我向妈妈投去了疑惑的眼神。妈妈告诉我:“小苏打和白醋产生二氧化碳气体,形成气泡。红豆质量轻,体积小,气泡附着在红豆上,浮力大于重力,所以红豆在浮力的作用下上浮到液面。上浮到液面后,因与空气接触,气泡破裂,红豆受到的浮力小于重力,又沉入杯底。这样反复循环,我们就看到了会”跳舞的红豆了。”

Science is very magical, it is beside our. We should start work only and they make friend, with respect to the boundless fun that can experience them.

科学十分神奇,它就在我们的身边。我们只要动手和他们交朋友,就会感受它们的无穷乐趣。

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