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
46
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
AppleExpandsItsTouchy-feely(使人动心的)VisionThisweekend’sl
期货交易所的特性主要包括()。A、高度系统性B、高度严密性C、高度组织化D、高度规范化A,B,C,D在现代市场经济条件下,期货交易所是一种具有
Formanypeopletoday,readingisnolongerrelaxation.Tokeepuptheirwo
冰片入丸散内服,每次的用量是( )。A.0.015~0.03g B.0.15
属于第二类精神药品品种的是A.司可巴比妥 B.芬太尼 C.甲基麻黄素 D.
A.自由联想 B.移情 C.厌恶疗法 D.非指令性治疗 E.放松训练法行
下列有关分析程序的说法中,错误的是( )。 A.分析程序可以用于应对认定层次
下列各项中,属于减免税形式的有()。A:免征额B:税率式减免C:税额式减免
(2020年真题)根据《环境影响评价技术导则土壤环境试行》关于土壤环境现状监测点
(2019年真题)根据《建设工程施工劳务分包合同(示范文本)》,关于劳务分包人应
最新回复
(
0
)