三年級(jí)學(xué)生觀察日記

三年級(jí)學(xué)生觀察日記

三年級(jí)學(xué)生觀察日記

數(shù)菜籽            
11月9日     晴

今天科學(xué)課，李老師走進(jìn)教室就問了我們兩個(gè)問題：
“你們猜一猜，每棵油菜上大約有多少個(gè)菜莢？每個(gè)菜莢里有多少顆菜籽？”
老師的話剛說完，大家就七嘴八舌地回答起來：“21個(gè)菜莢，20顆菜籽。”
“50個(gè)菜莢，16顆菜籽。”
“100多個(gè)菜莢，30幾顆菜籽。”……
李老師神秘地笑了笑，說：“我們還是到田里去解決這個(gè)問題吧！”
我們來到田邊，一看，二十多天前，這里還是一片金黃，現(xiàn)在每一棵油菜的枝條上結(jié)滿了一個(gè)個(gè)飽滿的菜莢了，看起來有點(diǎn)沉。仔細(xì)觀察菜莢，只見一顆顆種子脹滿了它的“外衣”，圓鼓鼓的凸了出來，頂端尖尖的；剝?nèi)?ldquo;外衣”——菜莢，里面的種子圓溜溜的，像一顆顆小珍珠晶瑩發(fā)亮，十分好看。
我和仇琦兩人一組合作數(shù)，我們兩個(gè)兩個(gè)地?cái)?shù)，很快就數(shù)完了三株油菜。當(dāng)我數(shù)到最后一棵的時(shí)候，大吃一驚，這株足足有400多個(gè)菜莢，它們密密麻麻地掛在莖上伸出的枝條上。我還從上面采來了一個(gè)菜莢，剝開數(shù)了數(shù)有27顆菜籽。
――劉  召

Today, science classes, the teacher asked us to walk into a classroom on two issues : "You guess.Rape about the number of dishes for each pod? how many there are in each pod vegetables rapeseed? "the teacher said just now.We will go on to answer : "21 dishes dioxin, 20 were rapeseed. "" Vanilla 50 dishes.Rapeseed 16 satellites. "" Vanilla more than 100 dishes, a few of rapeseed 30. ": : The teacher smiled mysteriously and said :"We have to solve this problem or to the fields!" We have come to the edge, a look at two days ago,here was still golden, every tree branches rape of a month full of dishes full unity of the pod looks a bit Shen.Careful observation pod vegetables, I saw so many seeds of its legs "while" a convex circular swelling, and the sharp tip;Has the "cloak" of dioxin -- vegetables, seeds inside the circle Liuliu, like so many small shiny glistening pearls, very pretty.Theirs was a combination of me and a few Qiuqi, two at several quickly finished several lengthy rape.When I find that the tree came over 400 pages of this strain of dioxin in food,They're helping to hang on branches stems.I have to adopt a vegetable dioxin from above, catching 27 rapeseed augmented.