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  • 一個小實驗作文500字

      【讓水晶樹開花】

      正在客歲的冬天,媽媽和我一路做過一個小嘗試,讓水晶樹開花。

      媽媽從袋子里拿出褐色的小樹,它光禿禿的,好難看哦。媽媽告訴我,她能夠用奇異的藥水讓小樹開滿花朵!其時我將信將疑,心想這怎樣可能呢?取其這么獵奇,不如按照媽媽的要求嘗嘗。我把小樹拆卸好,找一個避風的處所按好底座,然后把小樹固定正在凹槽里;然后把“奇異藥水”平均地澆正在樹根上。媽媽說接下來要做的就是耐心期待,一路水晶樹“開花”的奇不雅吧!

      一小時后,我發覺小樹枝上起頭冒出了一些零散的粉色“小芽”,我又驚又喜,繼續期待;又過了四個小時,我發覺奇異的小樹枝頭上開滿了粉色的小花,一簇簇,亮晶晶的光彩奪目,并且花越開越多;再過兩小時后,花兒曾經包抄正在小樹的四周,小樹就像長滿了“葉子”一樣,粉色水晶花兒曾經壓滿了枝頭。我樂壞了,好高興呀!

      這時媽媽遞給我一個放大鏡,讓我細心察看的晶體,并吩咐我,要小心,小樹很是容易損壞,只需不去碰它,能夠撫玩好幾個月呢!我用放大鏡細心察看著,果實正在小樹上發覺了良多晶體。媽媽告訴我,這種“奇異藥水”里包含了不成見的晶體,化學家們把這種晶體叫做“磷酸二氫鉀”。磷酸二氫鉀本來就呈晶體布局,但因它們消融正在水里,所以我們看不到其布局,可是,當“奇異藥水”里的水蒸發后,這種磷酸二氫鉀就會聚攏到一路,這時,我們就以看到它們的外形了,還有你能夠選擇正在“奇異藥水”里加上本人喜好的顏料,那么這個晶體就會變成彩色的了。

      聽了媽媽關于化學學問的引見后,我愈加獵奇了,那晶體到底是什么呢?媽媽告訴我,其實我們四周有各類各樣的晶體,如天冷的時候,你頭上落滿的雪花是晶體;你蓋城堡用的沙子是晶體;你也許見過閃閃發光鉆石或寶石,那也是晶體;電子手表是靠液態晶體(液晶)顯示時間的。我們人類的骨頭中也有晶體的哦!你四周有很多細小幾何體形成的晶體,吃的鹽和糖都是晶體。曉得了這些事理,我對水晶樹開花一點也不腳為奇了!

      實是一次風趣的嘗試!當前,我還要多做些嘗試,多領會一些科學學問。

      【第2篇】

      我正在看課外書的時候曉得了《熱縮冷縮》,于是,我和哥哥做了個小嘗試。

      我先找來氣球、玻璃瓶、塑料管、木塞、鉆子等。我點燃了蠟燭,起頭了第一次嘗試。起首我把癟癟的氣球套正在玻璃瓶上,接著把玻璃瓶放正在蠟燭火焰上。哇!本來軟綿綿地耷拉著的氣球,慢慢的鼓了起來,像一個打了勝仗神氣十腳的上將軍!我可不讓它驕傲,又把它放進冰箱里。過了一分鐘,我打開冰箱,氣球卻像害羞的小女孩一樣縮到了玻璃瓶里去了。啊!氣體實的有熱縮冷縮的特征呢!

      第一次嘗試的成功,給了我決心和進一步嘗試的樂趣。

      第二次嘗試起頭了,我把一個鐵球放正在酒精爐上燒了一會兒。本來它是能夠從一個銅環中穿過的,這時,它卻被卡住了。過了一會,鐵球慢慢冷了,它又穿過了鋼環掉下來了。哈哈,掉正在地上“撲通”一聲,還把我嚇了一跳呢。這一次嘗試了固體金屬也熱縮冷縮。

      這兩次嘗試使我不只弄大白了物體有熱縮冷縮的特征,還熬煉了我的脫手和動腦的能力,帶給了我很多樂趣。

    未經允許不得轉載:小學生作文網 » 一個小實驗作文500字

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