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  • 您的位置:首頁 > 小學生作文 > 優秀作文 >

    浮蛋記

    時間:2014-10-13 09:53:20來源:課堂作文網點擊:作文字數:700字

       今天,在劉老師的作文班里,我們做了一個神秘又有趣的科學實驗。

        實驗開始前,我們準備了:一雙筷子、一個雞蛋、一個水杯、一壺水和一包神秘物。

        開始做實驗了:首先,劉老師小心翼翼地拿起雞蛋,輕輕地放在杯子里,接著拿起水壺慢慢地把水倒進杯子里。我們都目不轉睛、全神貫注地看著,生怕漏掉任何一個細節。此時的雞蛋沉在水底,一動不動,就像一位潛水員潛到水底正認真觀察。

        而后,劉老師有請王詩奕上臺拿起神秘物,漸漸地倒進水杯里。這時,水底像下了一場厚厚的雪,全白了。王詩奕拿起筷子慢慢地攪拌。劉老師露出詭異的笑容:“萬眾矚目的時刻即將到來,下面就是見證奇跡的時刻!”我們充滿期待地看著水杯,但是雞蛋沒有任何動靜,仍然沉在水底,我們都很失望。

        老師又請汪金玉再次拿起神秘物,倒入水中。她在攪拌時我們驚奇地發現雞蛋竟然搖搖擺擺地往上浮了,就像一個醉漢在走路。我們都興奮不已地尖叫道:“太神奇了!太神奇了!”

        最后,雞蛋不緊不慢地浮到水面,露出她圓溜溜的小腦袋,那樣子可真享受啊!這到底是怎么一回事呢?老師把原理告訴了我們:鹽水比清水的浮力大,所以雞蛋才能浮起來。這也是人們可以躺在“死海”上看書的秘密。

        這次試驗通過我知道科學的力量是多么強大,在生活中,只要你仔細觀察,認真思考就能發現科學的奧秘。

            

    老師點評:科學并不神秘,它出現在我們生活的每一個角落。作者的這篇文章就生動說明了只要你善于觀察,積極動腦,科學的面紗自己就會揭掉!

            韶山南路小學  吳康盛  指導老師:劉玲         湖南省長沙市雨花區井灣路中建桂苑天天向上培訓推薦

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