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
22
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
aftershocks
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3096136.html
相关试题推荐
很多年轻人决定到该国去追求知识。(inpursuitof)Manyyoungpeopledecidedtogotothatcountry
Withtherecentscandalinmind,wouldyouadvisepeoplewhohave______inthei
About______ofthepeopleinQuebecareofFrenchdescent.A、30%B、50%C、0.8D、0.9
HolmesandWatsonhadapprehendedthreepeopleonsuspicionofshoplifting.The
Mostpeopleconsiderbacteriadangerous.Afterall,thesemicroorganismscau
Mostpeopleconsiderbacteriadangerous.Afterall,thesemicroorganismscau
PeopleintheUnitedStatesinthenineteenthcenturywerehauntedbythepr
PeopleintheUnitedStatesinthenineteenthcenturywerehauntedbythepr
PeopleintheUnitedStatesinthenineteenthcenturywerehauntedbythepr
PeopleintheUnitedStatesinthenineteenthcenturywerehauntedbythepr
随机试题
DothefollowingstatementsagreewiththeinformationgiveninReadingPassage
______,hewouldfeelexhaustedafterawholeday’swork.A、StrongasisheB、St
[originaltext]M:Itseemsthatwe’llhaveanotherfinedaytomorrow.Let’sgot
PeopleinalargeareaanypossessthesameDNAthreadbecause______.[br]Iftw
Troubledbythepersistentlypoorgraduationratesofbasketballandfootbal
有可能无限期拥有的知识产权是( )。A.著作权 B.专利权 C.商标权
A.塞因塞用 B.通因通用 C.寒者热之 D.热者寒之 E.标本兼治妇女
以下是人力资源费用支出控制的三个阶段:①制定控制标准;②差异的处理;③人力资源费
以下不属于心理咨询的内容的是A.情绪问题 B.家庭矛盾 C.人际关系 D.
生产经营单位发生生产安全死亡事故后,要立即启动应急预案,开展现场应急救援工作。下
最新回复
(
0
)