首页
登录
职称英语
The ocean is still salty.Evaporated water leaves the salt behind, which makes t
The ocean is still salty.Evaporated water leaves the salt behind, which makes t
游客
2024-08-05
42
管理
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. [br] 【D10】
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
eruption
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3706098.html
相关试题推荐
Whichonebelowissaidtobeevenmoresevereaboutleft-behindchildren?[br]
Whichonebelowissaidtobeevenmoresevereaboutleft-behindchildren?[br]
Themanquickly___________behindthebuildingtoavoidbeinghurtbythestones
Marijuana(大麻)isagreen,brown,orgraymixtureofdried,shreddedleaves,
Marijuana(大麻)isagreen,brown,orgraymixtureofdried,shreddedleaves,
Marijuana(大麻)isagreen,brown,orgraymixtureofdried,shreddedleaves,
Marijuana(大麻)isagreen,brown,orgraymixtureofdried,shreddedleaves,
Whenheleavesthecompanynextyear,he_______forthiscompanyforthirtyyears
Whenheleavesthecompanynextyear,he__________forthiscompanyforthirtyye
Theoceanisstillsalty.Evaporatedwaterleavesthesaltbehind,whichmakest
随机试题
•Readtheletterbelowaboutakindofserviceofferedbyacompany.•Inmostof
[originaltext]W:Wehaven’thadanythingfunforalongtime.Howaboutgoings
Economistsoftendisagreeon____________(美国经济是否复苏).whethertheU.S.isinarec
Somemarriagesseemtocollapsesosuddenlythatyou’dneedacrystalballt
甲公司是一家上市公司,于2015年6月在上海证券交易所上市。该公司董事会成员共计
与气的生成关系最密切的是A.心、肺 B.心、肝 C.肺、脾 D.肺、肝
共用题干 某公司将公司的一部分分立成为一个独立的新公司,并对该新公司近期的经营
我国社会主义改革是一场新的革命,其性质是( )。A.解放生产力,发展生产力
重大的传染性疾病很可能和人们随意捕杀食用野生动物有关,近些年不少动物如今已沦为濒
属于电离辐射的物理因素是A.可见光 B.X射线 C.激光 D.射频辐射
最新回复
(
0
)