首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
The ocean is still salty. Evaporated water leaves the salt behind, which makes the ocean salty. How did oceans form? It is said
The ocean is still salty. Evaporated water leaves the salt behind, which makes the ocean salty. How did oceans form? It is said
admin
2021-03-27
41
问题
The ocean is still salty.
Evaporated water leaves the salt behind, which makes the ocean salty.
How did oceans form?
It is said that ocean formed at least【D6】________ago.
Atmosphere and clouds on the Earth are gases, such as water vapour escaping from the planet’s interior.
Were oceans in the past as salty as they are today?
Oceans were not so salty in【D7】________ state.
With the initial rains sweeping over the planet’s 【D8】________ and filtering down to the hollows, materials containing ingredients of salt were picked up.
Chlorine, came from the solid and gaseous fallout of land and【D9】________volcanoes.
The oceans’ salt content increases because of the steady flow of chemical-rich rivers and streams and the【D10】________of volcanoes and undersea vents.
【D7】
I know why the ocean is still salty: evaporated water leaves the salt behind. But how did it get salty in the first place?
According to one hypothesis, oceans formed at least 500 million years ago when water vapour and other gases escaping from the Earth’s interior gradually formed the atmosphere and clouds surrounding the planet. As the earth cooled below the boiling point of water, rain began to fall, and kept falling for centuries. Eventually the rainfall filled the Earth’s hollows and formed oceans.
In their infant state these oceans were not nearly as salty as they are today. As the initial rains swept over the planet’s surface and filtered down to the hollows, the rushing waters picked up chemicals from erosion of the Earth’s crust. These chemicals included sodium, which is one of the main ingredients of salt. The other main ingredient, chlorine, came from the solid and gaseous fallout of land and ocean floor volcanoes. Over hundreds of millions of years, the steady flow of chemical-rich rivers and streams and the eruption of volcanoes and undersea vents combined to increase the ocean’s salt content.
This does not mean, however, that the oceans’ saltiness is constantly increasing. Scientists believe that ocean salinity reached plateau hundreds of millions of years ago, when roughly the same amount of salt fed into the oceans was deposited as sediment on the ocean floor.
选项
答案
their infant
解析
转载请注明原文地址:https://kaotiyun.com/show/OPfK777K
本试题收录于:
A类竞赛(研究生)题库大学生英语竞赛(NECCS)分类
0
A类竞赛(研究生)
大学生英语竞赛(NECCS)
相关试题推荐
WhatisMr.Bacon’sjobspecifically?
What’sbeingdiscussedinthetalk?
—Iwishwehadtakenthebusinsteadofwalking.—Youlookreallytired.______—No,let’skeepgoing.Wearen’tthatfarfrom
Youhavemadeanemailappointmentwithyourforeignlanguageteacher,PeterBrown,butfailedtokeepit.Writeanemailtoyou
Whatcoloroflightissaidtoespeciallyaffectsleep?
AcertainmonthhasfiveThursdaysinitandthedateofthesecondSundayisthe13th.WhatisthedateofthethirdTuesday?
Unravelthereasoningbehindthisstarandfillinthemissingletter.
Yesterdaymydoctorgavemesometablets.Therewerefiveinthebox.Hetoldmetotakeoneeveryhalfhour.Howlongdidthey
英国人的矜持和美国人的张扬体现在文学作品中。通过分析过去一个世纪英语书籍的数字化文本,可以得出这样的结论:【T1】自20世纪80年代以来,美国书籍中传达情感内容的单词已变得比英国书籍中常见得多。英国布里斯托大学人类学家阿尔伯托阿瑟比及其同事利用谷歌数据库对
A、Attheoffice.B、Onthewaytowork.C、Homeinbed.D、Awayonvacation.C题目问汤姆现在在什么地方。对话中女士说,医生让汤姆待在床上直到周一。因此,汤姆在家卧床休息。故选C。
随机试题
试述专利权共有。
辐射性白内障可由下列何种因素引起
指患者对某种药物治疗后所带来的健康状况的偏好是()。
急性感染性多发性神经炎累及的部位有
货物采购中的现场监造与检验工作不包括()。
根据私募股权投资基金的“资产剥离”的规定,私募股权投资基金收购公司()年内不允许通过分红、减持、赎回等形式进行资产转让,进而阻止它们为短期持有资产而进行收购活动。
中国证监会基金监管部主要通过()方式实现基金监管。
西藏的气候类型复杂,包括()。
使遗传提供的发展的可能性转变为现实的是()。
打开数据库的“页”对象列表,单击对象后再单击“设计”按钮,属于()。
最新回复
(
0
)