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                開心作文網

                珍惜每一滴水優秀日記300字

                2018-12-22 12:01:22推薦訪問:日記

                  珍惜每一滴水

                  前幾天,孔老師給上了《升和毫升》這節課,讓我知道了水的重要性。課后,老師讓我們回家后做一個實驗,實驗的內容是:

                  1.一個沒關緊的水龍頭,一分鐘浪費了多少水。

                  2.中國有13億人口,如果每人都浪費那么多水,那一共浪費了多少水。

                  我回到家,把水龍頭調到滴水狀態,把滴下來的水用量杯接住。10秒……20秒……一分鐘到了,我看了看量杯,才11毫升水嘛,那么少一點點。一點都不多啊~

                  我又繼續算中國有13億人口,如果每人都浪費那么多水的算式是:

                  1300000000×11=14300000000(ml)14300000000ml=1430000L

                  哇。。。這是多么大的一個數字啊!1L水差不多有一大瓶鮮橙多這么多,那1300000000人浪費的水不就是有1430000瓶大瓶鮮橙多了嗎?!

                  算到這里,我想到了云南那邊那兒廁所沒水沖, 上完沒水洗手, 喝的水都不太足了 (雖然有瓶裝水, 但煮菜洗菜的水似乎都不足)連吃完飯洗碗的水也沒了……

                  如果把浪費的這些水都節約下來,那他們不就有水喝了嗎?

                  在這里,我要呼吁大家節約用水,珍惜每一滴水!

                  珍惜水資源

                  計量液體的體積,如水、油等,常用容積單位升和毫升,也可以寫做L和ML,一升水=1000毫升,1毫升=1立方厘米,上課時,孔老師讓我們用針筒吸1毫升水,再放到手心里感受,我覺得很少。老師布置了課外作業,讓我們操作實踐:了解一個關不緊的水龍頭,一分鐘可以滴1多少水?并計算一天會滴多少水?”我發現一分鐘大約可以滴10ml水,1天就是10×60×24=14400毫升。“中國有13億人,要是每個人都不關緊水龍頭,那么一年會浪費多少毫升水?”中國人要是每個人都不關緊水龍頭那么會浪費14400×1300000000=18720000000000毫升水=1872000000升水,再乘一年【按365天計算】那就是1872000000×365=683280000000升水,而云南現在鬧干旱,這些水運到旱區可以澆灌很多的田野,讓那里的人們吃上自己的糧食,不讓那里的人餓肚子,讓他們喝上干凈健康的水。

                  我們要節省水資源,珍惜地球的資源,同學們,從我們做起,珍惜生活中每一滴水!

                作文投稿
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