托福阅读事实信息题合集之TPO27-2托福阅读事实信息题是阅读考试中比较常见的一种题型，tpo则是托福阅读备考最权威的材料，所以托福小编综合二者，为大家集中整理了tpo阅读中考察的事实信息题及其对应的解析，供大家参考使用。本文带来的是TPO27-2的事实信息题，一起来看看吧。TPO27-2TheFormationofVolcanicIslandsParagraph3:Howcanvolcanicactivityoccursofarfromaplateboundary?TheHawaiianislandsprovideaveryinstructiveanswer.Likemanyotherislandgroups,theyformachain.TheHawaiianIslandsChainextendsnorthwestfromtheislandofHawaii.Inthe1840sAmericangeologistJamesDalyobservedthatthedifferentHawaiiislandsseemtoshareasimilargeologicevolutionbutareprogressivelymoreeroded,andthereforeprobableolder,towardthenorthwest.Thenin1963,intheearlydaysofthedevelopmentofthetheoryofplatetectonics.CanadiangeophysicistTuzoWilsonrealizedthatthisageprogressioncouldresultiftheislandswereformedonasurfaceplatemovingoverafixedvolcanicsourceintheinterior.WilsonsuggestedthatthelongchainofvolcanoesstretchingnorthwestfromHawaiiissimplythesurfaceexpressionofalong-livedvolcanicsourcelocatedbeneaththetectonicplateinthemantle.Today’smostnorthwestislandwouldhavebeenthefirsttoform.Theyastheplatemovedslowlynorthwest,newvolcanicislandswouldhaveformsastheplatemovedoverthevolcanicsource.Themostrecentisland,Hawaii,wouldbeattheendofthechainandisnowoverthevolcanicsource.6.Inparagraph3,whatistherelationshipbetweenthescientificcontributionofJamesDalyandTuzoWilson?OWilsonprovidedanexplanationfortheobservationsmadebyDaly.OWilsonchallengedthetheoryproposedbyDaly.OWilsonfoundnumerousexamplesofislandchainsthatsupportedDaly’stheory.OWilsonpopularizedtheexplanationofvolcanicislandformationformulatedbyDaly.解题：根据两个科学家的名字进行定位。从thenin1963这一句可以了解到两者关系，说在板块理论刚开始发展的时期，tuzoWilson发现……那么肯定是使板块理论进一步发展了。所以B不对。而C虽然逻辑关系对，但文中只给了夏威夷岛一个例子。所以C不选。D说使解释流行，之前daly只是给了理论，并没解释，所以不对。而A既符合逻辑关系，也对wilson的描写是正确的。【3】为什么火山活动发生在离板块边缘这么远的地方呢?夏威夷群岛提供了一个非常有启发性的答案。就像其它的群岛一样，它们形成了一个岛链。夏威夷群岛链从夏威夷岛向西北扩张。在十八世纪40年代，地质学家JamesDaly观察到不同的夏威夷岛屿看起来经历了相似的演变过程，但它们所受腐蚀一个比一个严重，所以越往西北方向的岛屿形成时间可能越早。1963年，在大陆板块理论的早期，加拿大的地质学家TuzoWilson意识到岛屿年龄的增加可能是因为这些岛屿是板块表面从一个板块内部的固定火山源上方移动的结果。Wilson解释说，夏威夷向西北延伸的火山长链只是一个长期存于板块下、地幔中的火山源在板块表面的表现。现今最靠西北的岛屿可能是最先形成的。它们随着板块向西北移动。新的火山会随着板块的移动在火山源处形成。最年轻的岛屿，夏威夷岛，应该是在岛链的末端，现在应该在火山源上。Paragraph4:Althoughthisideawasnotimmediatelyaccepted,thedatingoflavasintheHawaii(andother)chainsshowedthattheiragesincreaseawayfromthepresentlyactivevolcano,justasDalyhadsuggested.Wilson’sanalysisofthesedataisnowacentralpartofplatetectonics.Mostvolcanoesthatoccurintheinteriorsofplatesarebelievedtobeproducedbymantleplumes,columnsofmoltenrockthatrisefromdeepwithinthemantle.Avolcanoremainsanactive“hotspot”aslongasitisovertheplume.Theplumesapparentlyoriginateatgreatdepths,perhapsasdeepastheboundarybetweenthecoreandthemantle,andmanyhavebeenactiveforaverylongtime.TheoldestvolcanoesintheHawaiihot-spottrailhaveagescloseto...