首页
登录
职称英语
Look at an atlas. How are mountains shown? Where are the highest mountains? A
Look at an atlas. How are mountains shown? Where are the highest mountains? A
游客
2023-10-17
10
管理
问题
Look at an atlas. How are mountains shown? Where are the highest mountains? A few mountains stand alone, such as Mount Egmont in New Zealand, and Mount Kenya in Africa. Most mountains are found in long chains called mountain ranges. The Pennines, the Cambrian Mountains, the Alps, the Andes and Rockies are examples of mountain ranges. The highest mountain range on the Earth is the Himalayas in Asia.
In order to understand how mountains are formed, we need to know what the inside of the Earth is like. The Earth is made up of layers of rock. The outside layer of rock, the one we live on, is called the Earth’s crust. Beneath the crust is a layer called the mantle. Near the top of the mantle, some of the rocks have melted and are a liquid, like sticky tar. Because all the rocks around it press on the mantle, the molten rock tries to force its way out. If the molten rock does find a weak spot, it bursts through the Earth’s crust, forming a volcano. Some mountains were made by volcanoes.
The Earth’s crust is made up of large pieces, called plates, which fit together like the pieces of a jigsaw puzzle. Some of the plates carry continents, others carry oceans. The plates move slowly, floating on the molten rocks of the mantle below. As the plates move, they push against each other, slowly pushing up the rocks in folds to form mountains.
India used to be a long way from Asia, but gradually the plate with India on it moved closer to the plate bearing Asia. The rocks in the sea between India and Asia were pushed up in folds that now form the Himalayan mountain range. That is why it is sometimes possible to find seashells near the tops of the Himalayas. Many other mountain ranges, including the Alps, Rockies and Pen-nines , are similar great folds of rock.
While some plates are pushing together, others are moving further apart. Europe and North America are slowly moving further apart. Each year the Atlantic Ocean is a few centimetres wider. As the rocks move, they often crack or break. These breaks are called faults. Sometimes, great blocks of rocks are pushed up between two faults. These blocks may be so large and high that they form mountains. Some of the highland areas of East Africa are block mountains, so are the Vosges mountains in France and the Sierra Nevada mountains in the western United States. Block mountains often have flat tops. A flat-topped highland is called a plateau.
Questions 56—60
Complete the following form with no more than three words according to the passage.
[br]
选项
答案
plates
解析
(根据第三段第一句“The Earth’s crust is made up of large pieces,called plates…”可知答案为plates。)
转载请注明原文地址:https://www.tihaiku.com/zcyy/3105496.html
相关试题推荐
______thatthepartnershipbetweenthetwocountriesreacheditshighestpoint.A
______thatthepartnershipbetweenthetwocountriesreacheditshighestpoint.A
Astheplaneflewofftowardsthemountainsinthedistancethesoundofitseng
AsItrekkedthroughthemistsoftheHuangShanmountains,Icameuponayo
AsItrekkedthroughthemistsoftheHuangShanmountains,Icameuponayo
______thatthetradebetweenthetwocountriesreacheditshighestpoint.A、Durin
Lookatanatlas.Howaremountainsshown?Wherearethehighestmountains?A
Lookatanatlas.Howaremountainsshown?Wherearethehighestmountains?A
Lookatanatlas.Howaremountainsshown?Wherearethehighestmountains?A
Lookatanatlas.Howaremountainsshown?Wherearethehighestmountains?A
随机试题
WithHowells,James,andMarkTwainactiveontheliteraryscene,______became
Areyoulookingforwardto(go)______onyourvacation?going本题测试的是动词的习惯用法。短语词组l
关于校对工作中的校是非,说法错误的是( )。A.校是非是指校对者凭借自身储备的
C本题求解的定义域是自然定义域,也即使得函数有意义的所有点的集合。对数函数ln(3x+1)要求3x+1>0,根式要求5-2x>0,反三角函数arcsinx要求-
按照目前我国能源统计规定,下列各项中是可以计入能源购进量的是()。A.供货
上市公司出现下列哪些情形不得非公开发行股票?()A、连续3年不分红 B、最近1
男性,56岁,恶寒发热,鼻塞流涕,咳嗽,痰白,乏力气短,自汗,舌淡苔薄白,脉浮无
胃溃疡愈合A.由纤维组织及内皮细胞修复 B.由周围的腺上皮细胞修复 C.由肉
期货公司设立、变更、解散、破产、被撤销期货业务许可的,期货公司依法应当在()上
下列行为中,属于经济学意义的投资是()。A.购买股票 B.土地使用权转让
最新回复
(
0
)