人教版高中英语选修6第五单元课件

选修6Unit51.Tobeabletolistsomenaturaldisasters2.Tohaveageneralunderstandingaboutvolcanoes3.ToknowsomebasicinformationaboutMountKilaueaMoreandmorenaturaldisastersandextremeweatherareimpactingonourlives.Canyoulistany?What’sthevideoabout?floodlightningthunderstormsandstormhurricanetornadotyphoonlandslideearthquaketsunamivolcaniceruption闪电洪水龙卷风雷暴火山喷发沙尘暴海啸地震飓风滑坡台风Therearesomewordsaboutnaturalphenomenaornaturaldisasters.Matchthemup.tsunami:anearthquakehappeningundertheseafloorGuesswhichnaturalphenomenonornaturaldisasterisbeingdefined.earthquake:asuddenviolentmovementoftheEarth’ssurface,sometimescausinggreatdamagethunderstorm:alotofrainfallingquickly,withloudnoisesandflashesoflightsandstorm:astormcausedbystrongwindsandblowingsandordustflood:alotofwaterinanareawhichisusuallydrytornado:acolumnofairthatturnsveryquicklytyphoon:atropicalcyclone(热带气旋)occurringinthewesternPacificorIndianOceanhurricane:aviolentstormwithextremelystrongwindsandheavyrainlandslide:alargeamountofearthandrocksfallingdownaclifforthesideofamountain.volcaniceruption:ashsometimesrisingintotheairfrominsidetheearthWhatdoyouknowaboutvolcanoes?Themagmaeruptsfromthecrater;thelavaflowsslowlydownthemountain.lavacraterashcloud/volcanicashmagmaPleaselookatthediagrambelow.Itshowsaneruptingvolcano.1.Howisavolcanoformed?Therocksundertheearthbecomehotterandhotteranderuptfromthemountain.Jointsbetweentheplates.Oftenneartheoceans.2.Fromwhereisitmostprobableforavolcanotoerupt?HaleakalaCrater,thelargestdormantvolcanointheworld(Maui,Hawaii)AnactivevolcanoAdormantvolcano(休眠火山)Anextinctvolcano3.Whattypesofvolcanoesdoyouknow?ThepositionoftheKilaueavolcanoLet’slearnsomethingaboutoneofthemostactivevolcanoes—TheKilaueavolcano.NowwatchapieceofvideoaboutMountKilaueatoknowmoreaboutit.MountKilaueainHawaiihaserupted______timessince1952.Thecurrenteruptionbeganin______andhasbeengoingoneversince.Let’senjoysomewonderfulmomentsofthelongeruption.621983Hawaii’sKilaueavolcanobeganeruptinginJanuary1983withaspectaculararching(拱起)lavafountain.ThisphotowastakenonFeb.25,1983.Geologistspreparingtocollectsamplesnearanactivevent(排放口)eruptinginthebackgroundatKilauea’seastriftzone(断裂带)onJan.7,1983.Anaerial(空中的)viewofPu'uO'ocrater,wheretheeruptionhasbeenoccurring,atdusk,soonaftertheKilaueaeruptionbegan.(June29,1983)AnaerialviewofPu'uO'ocraterfromthesoutheastonApril21,1988.AnaerialviewofthelavalakeinPu'uO'ocrater,takenAug.30,1990.Thecraterwasabout800feet(250meters)indiameter.Kilaueavolcano’seruptiondestroyedHawaiiVolcanoesNationalPark’sWahaulaVisitorCenter,shownonthetopin1987.Thebuildingwassetaflame(着火的)bymolten(熔化的)lavaonJune22,1989.LavafromKilaueavolcanoflowsfromatubeintotheseanearKupapauPointinHawaii.(Nov.27,1989)LavaenterstheoceaninMay2010fromtheKalapanaflowatKilaueavolcanoinHawaii.AgeologisttakingasampleonJuly14,2010,fromarecentlyformedskylight(天窗)ontheQuarryflowlavatube(采石场流岩管).TheQuarrylavaflowbeganin2010.Haveyoueverthoughtabouthowpowerfulnatureis?Trytocompletethetable.GroupworkfloodhurricanetornadoearthquakeWhatphenomenadoesithave?Whatresultsdoesitbring?Haveyoueverconsideredhowweakhumansarecomparedwithavolcano,hurricaneorearthquake?Inyourgroupsdiscusswayshumanbeingsprotectthemselvesfrompowerfulnaturalforces.GroupdiscussionP332Wecanhelplessenthedamageandlossescausedbyitthroughcombinedeffortsofriskassessment(评估)andearlywarning.Weshoulddomoretoprotecttheenvironmenttoreducethenaturaldisasters.Possibleanswers:Homework1.Lookupthenewwordsandexpressionsofthetextinthedictionary.2.Previewthereadingpassage—ANEXCITINGJOB