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
2024-08-08
5
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/3710752.html
相关试题推荐
Howmanypeoplewerekilledinthesuicidebombattack?[br][originaltext]The
Howmanypeoplewerekilledinthesuicidebombattack?[br][originaltext]The
Howmanypeoplewerekilledinthesuicidebombattack?[br][originaltext]The
Howmanypeoplewerekilledinthesuicidebombattack?[originaltext]TheNigeri
Whichdiagramshowsthepercentageofyoungpeopleusetheirmobilephonesatle
WhatkindofpeopledidTinachoosetowriteaboutinherfirstcolumn?[br][o
WhatkindofpeopledidTinachoosetowriteaboutinherfirstcolumn?[br][o
WhatkindofpeopledidTinachoosetowriteaboutinherfirstcolumn?[br][o
Attheendofabanquet10peopleshakehandswitheachother.Howmanyhandshak
Whentwopeoplefeelthesameabouteachother,theirfeelingsare______.A、mutua
随机试题
假定你是ABC公刊的Sam,刚从纽约旅行回来,请你给在美国旅行期间接待你的Joe写一封感谢信。写信日期:3月12日内容:1.感谢他在旅行期间对你的
[originaltext]M:Thisisit.Iknowthatitissmallerthanyouwanted,butit
Amorecarefulsecretary____________(就不会犯这样明显的错误了).wouldn’thavemadesuchglar
TheInternetisaninternationalcollectionofcomputernetworksthatallun
[originaltext]W:Weallknowthatthereisanundergroundcave,asmallcavewh
Ofthemanyfactorsthatcontributetopoorperformanceonstandardizedtest
返乡创业的张某在创业的头两年流转200亩土地发展规模生产,通过生产有机小杂粮,提
中央银行充当最后贷款人时,它的操作方式包括()。A.公开市场业务 B.再
金融市场中,被称为借贷资金供求指示器的利率是( )。A、法定利率 B、公
面痛以眼部痛为主的辨证归经,应属于A.足阳明经 B.足太阳经 C.足少阳经
最新回复
(
0
)