首页
登录
职称英语
What Causes Earthquakes? People have tried to explain the
What Causes Earthquakes? People have tried to explain the
游客
2023-10-14
51
管理
问题
What Causes Earthquakes?
People have tried to explain the cause of earthquakes since earliest times. Some people thought that quakes were sent from heaven to punish the wicked. Others believed that the earth rested on the backs of animals. We now have more scientific explanations of the cause of these destructive earth tremors. Earthquakes are evidence that some process is at work below the surface of the earth. Large bodies of magma may be in motion. These and other internal movements can result in a sudden release of energy by breaking the overlying, brittle rocks. During earthquakes, rocks beneath the surface are clearly bent and broken. In other cases deformation takes place slowly and without recognizable earthquake shocks. For example, in a drill hole in the Great Valley of California, earth movements have been measured for years. The rocks here are moving at a rote of about one meter per century. In some places pressure slowly builds up until the rocks break and quickly snap back into position. The faulting releases energy that may have built up in the rocks for hundreds or thousands of years. This sudden burst of energy causes vibrations that travel through the rocks. These vibrations are an earthquake. Most earthquakes are so small that they can be detected only by sensitive instruments along the fault surface. However, energy may continue to trickle off in aftershocks. These shocks are much less severe than the main shock and may continue for months after the initial earthquake.
Summary:
Scientifically speaking, earthquakes are caused when【71】movements of the earth suddenly release energy by breaking the overlying rocks on the surface. During earthquake, rocks are clearly bent and broken. Elsewhere, rocks may slowly【72】over many years. Then the pressure may increase until the rocks break and snap back. This break【73】the energy in the rocks and causes vibrations. Most earthquakes are so small that they can be barely【74】, but large violent earthquakes can destroy inhabited areas. Sometimes【75】many follow after the first movement. [br]
选项
答案
releases
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3096134.html
相关试题推荐
Mostpeopleconsiderbacteriadangerous.Afterall,thesemicroorganismscau
Mostpeopleconsiderbacteriadangerous.Afterall,thesemicroorganismscau
HowmanypeoplehavebeenkilledsinceIslamistsbegantofightforindependence
HowmanypeoplehavebeenkilledsinceIslamistsbegantofightforindependence
HowmanypeoplehavebeenkilledsinceIslamistsbegantofightforindependence
HowmanypeoplehavebeenkilledsinceIslamistsbegantofightforindependence
(81)ThenameGenghisKhan(成吉思汗)probablymakesmanypeoplethinkofconquer
(81)ThenameGenghisKhan(成吉思汗)probablymakesmanypeoplethinkofconquer
(81)ThenameGenghisKhan(成吉思汗)probablymakesmanypeoplethinkofconquer
Somepeopleattempttoreducelife,mindandspirittothequantitative______o
随机试题
[originaltext]M:Whatwouldyouliketoseefirst,themonkeysorthedeer?W:
—______?Kate,youlookpale.—Oh,thankyou.Itdoesn’tmatter.A、What’sonB、W
Themisunderstandingofawordcouldevenaffectthewayawarended.[br]Tosa
下列不属于半抗原的是:A.多肽 B.脂肪胺 C.类脂质 D.多聚赖氨酸
房屋区分所有权是指在整体的房屋建筑中有不同的所有者,该房屋建筑可由所有权人()
以下关于通货紧缩原因的说法,正确的有( )。A.货币供给减少 B.有效需求增加
按照运输距离的不同,可将运输系统划分为()A.城市运输系统 B.城际运输系统
下列方法中,仅适用于短期可以掌握工作的是()。A:观察法 B:典型事例法 C
关于统计指标及其类型的说法,正确的有()。A.统计指标可分总量指标、相对指
患者,女性,心脏联合瓣膜病10年,发热1月,体温为37.2~37.6℃,厌食,消
最新回复
(
0
)