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                    作文網,小學生作文,初中作文,高中作文,作文題材大全!

                    2009年中考優秀作文素材:我發現了頭發有“電”

                    編輯:作文網 | 來源:考場素材

                    發現,是善于觀察的成果;發現,是總結經驗的來源:發現,是奮發向上的條件。每個人都會有自己的發現,當然我也不例外,我發現了頭發有“電”,這種電叫做“靜電”。

                    這個發現,是我無意中發現的。記得那節數學課,老師要求我們剪下些長方形和正方形的紙。上數學課了,我拿出這些小紙碎,放在桌上。老師要求我們以四個人為小組單位,討論長方形的特點和它的性質。因為那時候是寒冷的冬天,大家都穿著棉襖,正因為天氣冷,我就懶起來了,不洗頭發,所以就有頭屑,常常要抓一下頭發,真討厭。這節課,我的頭屑毛病又復發了,我不由得用手抓了幾下頭發,又放到桌子上了。此時,在離棉襖不遠的長方形小紙塊突然粘住了棉襖。我頓時被嚇了一跳。

                    為什么會這樣的呢?

                    晚上,我等爸爸回來后,迫不及待地問爸爸:“爸爸,您看看棉襖有很大的魔力,能吸住這個長方形。”說著,就像今天上數學課那樣展示跟爸爸看。“怎么不行的呢?今天還行的。”我焦急地問自己。爸爸心平氣和地問:“今天你是怎么弄的,再仔細想一想。”我想了一會兒,“啊!今天我先是擦了一下頭發,小紙塊才粘住棉襖的。”歡蹦亂跳地說。說著,我就像今天那樣連本帶利地展示了一遍,果然,紙粘住了棉襖。這時,爸爸笑著對我說:“哈哈!這是因為頭發有一種電,叫做‘靜電’,其實不是用手抓頭發就能使棉襖粘住小紙塊,而是你在抓的過程中,棉襖跟頭發之間發生摩擦,產生出靜電,當你把手放在桌上的時候,小紙塊就會因為靜電而吸住棉襖。”頓時,我茅塞頓開,恍然大悟。

                    發現,只要你留意周圍的各種事物,你的發現將會很多。

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