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
12
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
ThewordYogaitselfcomesfromanancientSanskritwordmeaning"union".Wh
[originaltext]M:Ican’tgetthiswindowopen.It’sreallystuck.W:Whydon’t
Idon’tseealotofTVcommercialsanymore,butthosesaccharineeHarmonya
Thispassageisfromapieceof______.[br]WhatdoweknowabouttheOperation
TheFrenchdivisionofMcDonald’shasrunadvertisementsthatincludedasur
火花效应使得冲击后接地电阻变小。()
( )是全美也是世界最大的股票电子交易市场,是世界上主要的股票市场中成长速度最
《商业银行公司治理指引》中强调,高级管理人员应当按照董事会要求,及时、准确、完整
下列选项中,关于劳动保护的说法。正确的是()。A.包括生活中的卫生保健和伤病医
下列关于增值税的征税范围说法正确的有()。A:销售或者进口的货物中的货物包括无形
最新回复
(
0
)