为什么海水不能喝作文(为什么海水又咸又苦作文)

为什么海水不能喝作文(为什么海水又咸又苦作文)

首页写景更新时间:2024-07-04 01:48:24
为什么海水不能喝作文(为什么海水又咸又苦作文)

为什么海水不能喝作文【一】

只要一说到海,人们都知道我们烟台就是海滨城市就有一片海,今天我就带着大家一起去触摸大海。

我们慢慢地靠近海边,一下车一阵海风吹过,它冰冰凉凉的很清爽,好像一天的烦恼都被吹走了,也很湿润,但是有时风吹来的时候像刀子一样,很凶猛,很有力。有几位小朋友在>放风筝,风越刮越大,有的小朋友都拿不住了,他们的爸爸妈妈也来帮忙。我听到海风在呼呼的吹着,像一千个诗人在吟诵,又像十个侠客在吼叫,很吓人。海风里会有一些海水的腥味,但是很清爽。

我们慢慢的来到沙滩上,沙滩上有着许多的小贝壳,踩上去软软的,很湿,有的时候会下沉,走上去就会有许多的脚印,天气很热的时候,沙滩很烫好像都可以上去煮鸡蛋了。我们来到海水边上,一些淘气的海水来碰我们的脚,像是在跟我们做游戏,也像是很害羞的样子。我突然看到几条小鱼在一个水坑里,我用手把它捧到大海里让它们去大海里游泳。我看到有几个小朋友在玩皮球,他们很开心。我闻到了海水的腥味,咸咸的。

我们开始下海了,一碰到海水,一丝凉气从脚一直蔓延到全身,十分凉爽,像冰箱里的凉气。我们飘在海上,海水很轻很轻,软软的总是裹着我的身体。海底很硬,因为有石头吧。我一不小心喝了一口海水,很咸、很苦也很涩。海水总会发出哗哗的声音。

我们来一起去触摸大海吧,感受它的宽广与包容。

为什么海水不能喝作文【二】

Long, long ago, there were two brothers, the one rich and the other poor. When Christmas Eve came, the poor one had not a bite in the house, either of meat or bread; so he went to his brother, and begged him, in God's name, to give him something for Christmas Day. It was by no means the first time that the brother had been forced to give something to him, and he was not better pleased at being asked now than he generally was.

"If you will do what I ask you, you shall have a whole ham," said he. The poor one immediately thanked him, and promised this.

"Well, here is the ham, and now you must go straight to Dead Man's Hall," said the rich brother, throwing the ham to him.

"Well, I will do what I have promised," said the other, and he took the ham and set off. He went on and on for the livelong day, and at nightfall he came to a place where there was a bright light.

"I have no doubt this is the place," thought the man with the ham.

An old man with a long white beard was standing in the outhouse, chopping Yule logs.

"Good-evening," said the man with the ham.

"Good-evening to you. Where are you going at this late hour?" said the man.

"I am going to Dead Man's Hall, if only I am on the right track," answered the poor man.

"Oh! yes, you are right enough, for it is here," said the old man. "When you get inside they will all want to buy your ham, for they don't get much meat to eat there; but you must not sell it unless you can get the hand-mill which stands behind the door for it. When you come out again I will teach you how to stop the hand-mill, which is useful for almost everything."

So the man with the ham thanked the other for his good advice, and rapped at the door.

为什么海水不能喝作文【三】

学了《海洋——二十一世纪的希望》这篇课文后,我心中就有了几个疑问:为什么海水是蓝色的?为什么海水是咸的?为什么海里会有波浪?其中,为什么海水是咸的?引起我的好奇心最大,所以,我决定去解开这个谜题。

我相继问了班里的“智慧大脑”筱雨和我同桌“聪明小能人”湘琪,可她们都说不知道。我也问了一下班里的其他几位同学,她们也说不知道。也许,我应该问一些有学问的人。休息日,我去问了家里最聪明、最有智慧的.二姐,“二姐啊,我可不可以问你个问题啊?”二姐边看电视边跟我说:“可以啊,你要问什么问题?”“就是,海水为什么是咸的?”“哦,这个问题啊,比较难,不过我还是知道滴!”“那,二姐,是什么,你快告诉我。”“不行,这得你自己去发现。”“二姐,求求你了,你就大发慈悲,告诉我呗!”“不行!”我拗不过二姐,失望的走开了。二姐不愿意告诉我答案是什么,唉,我这谜题是永远解不开了。我走到电脑旁,突然恍然大悟,用手拍拍自己的头,说:“哎呀,我真是个猪脑子,问不出来我可以上网查资料啊!”资料显示,大大小小的河流经陆地时,从岩石和泥土中吸取了大量的盐,并把这些盐带入海中,所以海水是咸的!

原来是这样啊!

为什么海水不能喝作文【四】

如果盐类元素不断地输入海洋,那海水不是会变得越来越咸了吗?还好在海洋中的生物会吸收许多的盐类物质,而化学吸附与沉淀作用也会将部分海水中的盐类转入沉淀物形态。根据测试研究发现,海水并没有越来越咸,海水中的盐份并没有在增加。

为什么湖水不是咸的呢?因为蒸气到了空气中的'水份在经由雪,雨以及地下水形成汇集至湖中,写人作文,就成了湖水,而湖水的盐份是海水的几百分之一,所以,我们感觉不到咸味。但是如沙漠里的湖,湖水不断地被蒸发,那么湖水也会像海水一样咸。横跨约旦和以色列的海,就是闻名于世的咸水湖。

海水中的水估计只有96.5%,其它的3.5%是氯化钾,氯化镁等盐类,根据实验平均有35克盐溶解在每千克海水中,其中氯化钾(盐类)占的比重较大,因为存在大量的氯化钾,所以海水才是咸的。

我国沿海城市居民,早期引进海水用日晒的方法提取海盐食用,这证明了海水中含有盐份,海水是咸的。我们可以用一个1250CC的瓶子装满海水,加热蒸发后大概可以得到一汤匙的食盐,所以,这也可以证明海水里含有盐份。

这样,海水是咸的道理我们都明白了吧。

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