咸咸的寒假作文【一】
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！
咸咸的寒假作文【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.
咸咸的寒假作文【三】
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，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。
咸咸的寒假作文【四】
??假大扫除小学寒假作文1月22日，我和妈妈在家里做着假期大扫除，做得可起劲呢，连奶奶和爷爷也来帮了我们的忙。
早上，爸爸因为教育局没有放假，还要上班，所以就8：00去上班了。家里就只剩下我、妈妈、爷爷和奶奶。妈妈让我先练两篇字，再写一面数学练习题，然后帮妈妈做大扫除，我很快的答应了。
大约30分钟后我把那习题、练字，都做完了，只剩下帮妈妈做大扫除了。我来到妈妈身边问道：“妈妈，我能做点什么？”妈妈说：“你先用湿布把你房间里的床擦干净吧！”“OK”我说完，便跑去房间先把床里的竹席和一些被子还有其它的东西放到旁边的沙发上，再拿了一块布用水弄湿，然后去床上把床板擦干净了。我以为床板很容易擦，谁知那床板有很多细菌和灰尘，很难擦。我只好艰难地一点一点的擦着床板上的细菌、灰尘。
擦好床板后，我便去找妈妈，她正在卫生间洗衣服和窗帘。妈妈没等我开口就说：“擦好了，就去把3楼的所有窗户和墙壁都擦干净。”我回答到：“是，我保证完成任务。”说完，我便去准备了。
我把一块布弄湿后，就来到一面很脏的`墙壁前。上上下下的擦了一会，发现擦不干净，又擦了一会，还是擦不干净。我愣愣的站在墙壁前，心里想：怎么办呢？后来，我先去找来了一点去污粉，再放在擦布上，然后向墙壁一擦，嘿，真有效，脏脏的墙壁马上有了一道白色的行。我立刻把墙壁上上下下的擦了几次，几十分钟后，我把三楼的墙壁和窗户都擦干净了。
我刚想去找妈妈的时候，就听见她说：“做完了就去玩吧。”我听了以后，高兴地出去玩了。
