Unit5Thepowerofnature-readingPartOne:TeachingDesign(第一部分：教学设计)Period1:Asamplelessonplanforreading(ANEXCITINGJOB)AimsTotalkaboutvolcanoesToreadaboutvolcanoesProceduresI.WarmingupWarmingupbylearningvocabularyHello,everyone.Weshallreadaboutvolcanoestoday.Everydaydisastershappenhereandthere.Buthowmuchdoyouknowaboutthem?Turntopage93andfamiliarizeyourselfwiththewordsandexpressionsusedinthisunit.Trytomakeupastorybasedonthevocabulary,eitherinEnglishorinChinese.WarmingupsharingopinionsThephotoaboveshowsMountSt.HelenseruptingonMay18,1980.Whatdoyouknowaboutvolcanoes?Avolcanoisaplaceonearthwherelavacomesfromtheground.Volcanoesoftenhavethesameshapeasmountains.Mostvolcanoeshaveacrateratthetop.HowVolcanoesAreMadeMostvolcanoesaremadewheretectonicplatescometogether.Theseplatesmoveovereachother,whichcausesmagmatorisetothesurfacethroughweakplacesinthecrust.Therearemanyvolcanoes,liveordead,intheworld.Nextisalistofwell-knownvolcanoes.Well-knownvolcanoesEtna(Sicily,Italy)Hekla(Iceland)Kilauea(Hawaii,USA)Krakatoa(Rakata,Indonesia)MaunaLoa(Hawaii,USA)MaunaKea(Hawaii,USA)MountBaker(Washington,USA)MountErebus(RossIsland,Antarctica)MountHood(Oregon,USA)MountFuji(Honshu,Japan)MountRainier(Washington,USA)MountShasta(California,USA)MountSt.Helens(Washington,USA)Novarupta(Alaska,USA)OlympusMons(Mars(planet))Popocatépetl(Mexico-Pueblastateline,Mexico)Surtsey(Surtseyisland,Iceland)Santorini(Santoriniisland,Greece)Tambora(Sumbawa,Indonesia)Teide(Tenerife,CanaryIslands,Spain)Vesuvius(BayofNaples,Italy)II.Pre-readingDefiningvolcanology用心爱心专心116号编辑Youaregoingtomakevolcanologyasyourcareer,butwhatdoyouknowaboutit?Let’sgoontohttp://www.encyclopedia.comtofindoutitsdefinition.Volcanology(alsospelledvulcanology)isthestudyofvolcanoes,lava,magmaandrelatedgeologicalphenomena.Avolcanologist(alsospelledvulcanologist)isapersonwhostudiesinthisfield.Volcanologistsfrequentlyvisitvolcanoes,especiallyactiveones,toobservevolcaniceruptions,collectrockandlavasamples.Onemajorfocusofenquiryisthepredictionoferuptions;thereiscurrentlynoaccuratewaytodothis,butpredictingeruptions,likepredictingearthquakes,couldsavealotoflives.Beingavolcanologistisoneofthemostdangerousscientificprofessionsthereis,becausesuddeneruptionscanoccurduringthestudyofactivevolcanoes.Listening,readingandunderliningTurntopage34.Lookatthetextandlistentotherecording.Readaloudtoitandunderlinetheexpressionsusefultoyou.ExpressionsfromANEXCITINGJOBtravelto…,meetpeoplefrom…,workoutdoors,useinstruments,meetwith…,beoccasionallydangerous,make…feelalive,protect…from…,workfor…,collectinformationabout…,anactivevolcano,savelives,leaveone’shomes,move…outof…,cover…with…,burn…totheground,boilingrock,eruptfrom…,crashbackto…,causedanger,falldown…,bury…underthemoltenrock,inone’spath,forgetone’ssightof…,arrivein…,gotobed,befastasleep,hearastrongsound,outsidethewindow,experienceearthquakes,takemuchnotice,gobacktosleep,becomeasbrightasday,runoutof…intothebackgarden,see…inthedistance,inthesideofthemountain,fountaininto…,anabsolutelyfantasticsight,havealookat…,drive…upthemountain,becloseto…,collect…from…,put…on,looklike…,inthesuits,makeone’swayto…,lookdowninto…,climbdowninto…,collect…forlaterstudy,stayatthetop,beenthusiasticabout…,beamazedat…,causegreatdamageReadingforthesixWsNowweshallgooverthestorythesecondtimetofindoutinformationforthesixWs,thatis,who,when,where,what,howandwhytocompletetheformbelow.AhurricaneWhoWhenWhereWhatHowWhy用心爱心专心116号编辑III.ClosingdownClosingdownbyretellingthestoryInthelastfiveminuteslet’sdotheretellingtocheckourunderstandingofthetextanddemonstrateourabilitytospeakEnglish.ClosingdownbyreadingextensivelyToendtheperiod,let’sreadabitmoreextensively,thatis,readbeyondthetext,tolearnaboutthetypesofvolcanicdamage.TypesofvolcanicdamageTephraAgeneraltermforfragmentsofvolcanicrockandlavathat,regardlessofsize,areblastedintotheairbyexplosionsorcarriedupwardbyhotgasesinaneruptioncolumn.LaharAnIndonesiantermthatdescribesahotorcoldmixtureofwaterandrockfragmentsflowingdowntheslopesofavolcanoand/orrivervalleys.LavaflowsStreamsofmoltenrockthateitherextrudequietlyfromaventorarefedbylavafountains.Lavaflowsdestroyeverythingintheirpath,butmostmoveslowlyenoughthatpeoplecanmoveoutoftheway.PyroclasticflowsHigh-densitymixturesofhot,dryrockfragmentsandhotgasesthatmoveawayfromtheventthateruptedthemathighspeeds.Theymayresultfromtheexplosiveeruptionofmoltenorsolidrockfragments,orboth.LandslideLargemassesofrockandsoilthatfallslideorflowveryrapidlyundertheforceofgravity.Thesemixturescanmoveinawetordrystate,orboth.用心爱心专心116号编辑
