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一次有趣的小实验作文400字

2022-09-28 17:37:11三年级342

一次有趣的小实验作文400字

I did an interesting small experiment —— to extract chlorophyll today.

今天我做了一个有趣的小实验——提取叶绿素。

Above all, I am ready two 4 emerald green leaf, transparent glass cups, alcohol, water, scissors. Then, do not pour alcohol and moisture into two glass, at this moment full-bodied alcohol flavour is tangy and come, but alcohol and water are transparent liquid, the flesh does not have method to distinguish at all soon, then I make mark to two cups. Next, I cut 4 shiny green leave with scissors broken to foam shape, I cannot help stretching one's hand go feeling, well! Sticky sticky broken leaf is damp. Finally, I deuce leaf in putting two cups, after shaking gently quiet place ten minutes, observe the change of two cups color. Magical full marks / the phenomenon appeared! The glass that installing alcohol becomes green gradually, resemble the blackart liquid medicine of small koradji. The glass that installing water is transparent still, did not change. I feel I am division of Xiaowu of brimless of a supernatural power suddenly, make gave curious and strange thing.

首先,我准备好了四片翠绿的叶子、两个透明玻璃杯子、酒精、水、剪刀。接着,把酒精和水分别倒入两个玻璃杯中,这时浓郁的酒精味扑鼻而来,可酒精和水都是透明的液体,肉眼看根本没办法区分,于是我给两个杯子做上记号。然后,我把四片绿油油的叶子用剪刀剪碎至沫状,我忍不住伸手去摸,咦!黏黏的碎叶子湿漉漉的。最后,我把叶子平分放入两个杯中,轻轻摇晃后静置十分钟,观察两个杯子颜色的变化。神奇满分/的现象出现了!装着酒精的杯子渐渐变绿了,像小巫师的魔法药水。装着水的杯子还是透明的,没有变化。我忽然觉得自己就是一个法力无边的小巫师,制造出了稀奇古怪的玩意儿。

But, the glass that why installing alcohol can become green? My young canvass reads encyclopedia, a kind of special material is contained to call chlorophyll in original greenery. Because chlorophyll is OK dissolve at alcohol, cut greenery after breaking, put in alcohol, chlorophyll runs in alcohol, accordingly, the glass that installing alcohol became green, and chlorophyll is almost not dissolve at water, the glass that installing water does not have any change naturally also.

可是,为什么装着酒精的杯子会变绿呢?我仔细查阅百科全书,原来绿叶中含有一种特殊的物质叫叶绿素。由于叶绿素是可以溶于酒精,把绿叶剪碎后放在酒精里,叶绿素就跑到酒精里去了,因此,装着酒精的杯子变成了绿色,而叶绿素几乎是不溶于水,装着水的杯子也自然就无任何变化了。(文/高雨熙)

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