人教版高中英语选修6第五单元

选修6,教学辅助课件,Unit5,.,1.Tobeabletolistsomenaturaldisasters2.Tohaveageneralunderstandingaboutvolcanoes3.ToknowsomebasicinformationaboutMountKilauea,.,Moreandmorenaturaldisastersandextremeweatherareimpactingonourlives.Canyoulistany?,Whatsthevideoabout?,thepowerofnature,.,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:anearthquakehappeningundertheseafloor,Guesswhichnaturalphenomenonornaturaldisasterisbeingdefined.,.,earthquake:asuddenviolentmovementoftheEarthssurface,sometimescausinggreatdamage,.,thunderstorm:alotofrainfallingquickly,withloudnoisesandflashesoflight,.,sandstorm:astormcausedbystrongwindsandblowingsandordust,.,flood:alotofwaterinanareawhichisusuallydry,.,tornado:acolumnofairthatturnsveryquickly,.,typhoon:atropicalcyclone(热带气旋)occurringinthewesternPacificorIndianOcean,.,hurricane:aviolentstormwithextremelystrongwindsandheavyrain,.,landslide:alargeamountofearthandrocksfallingdownaclifforthesideofamountain.,volcaniceruption:ashsometimesrisingintotheairfrominsidetheearth,Whatdoyouknowaboutvolcanoes?,Themagmaeruptsfromthecrater;thelavaflowsslowlydownthemountain.,lava,crater,ashcloud/volcanicash,magma,Pleaselookatthediagrambelow.Itshowsaneruptingvolcano.,1.Howisavolcanoformed?,Therocksundertheearthbecomehotterandhotteranderuptfromthemountain.,Moreaboutvolcano:,Jointsbetweentheplates.Oftenneartheoceans.,2.Fromwhereisitmostprobableforavolcanotoerupt?,HaleakalaCrater,thelargestdormantvolcanointheworld(Maui,Hawaii),Anactivevolcano,Adormantvolcano(休眠火山),Anextinctvolcano,3.Whattypesofvolcanoesdoyouknow?,ThepositionoftheKilaueavolcano,LetslearnsomethingaboutoneofthemostactivevolcanoesTheKilaueavolcano.,NowwatchapieceofvideoaboutMountKilaueatoknowmoreaboutit.,MountKilaueainHawaiihaserupted_timessince1952.,Thecurrenteruptionbeganin_andhasbeengoingoneversince.,Letsenjoysomewonderfulmomentsofthelongeruption.,62,1983,HawaiisKilaueavolcanobeganeruptinginJanuary1983withaspectaculararching(拱起)lavafountain.ThisphotowastakenonFeb.25,1983.,Geologistspreparingtocollectsamplesnearanactivevent(排放口)eruptinginthebackgroundatKilaueaseastriftzone(断裂带)onJan.7,1983.,Anaerial(空中的)viewofPuuOocrater,wheretheeruptionhasbeenoccurring,atdusk,soonaftertheKilaueaeruptionbegan.(June29,1983),AnaerialviewofPuuOocraterfromthesoutheastonApril21,1988.,AnaerialviewofthelavalakeinPuuOocrater,takenAug.30,1990.Thecraterwasabout800feet(250meters)indiameter.,KilaueavolcanoseruptiondestroyedHawaiiVolcanoesNationalParksWahaulaVisitorCenter,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.,Groupwork,Haveyoueverconsideredhowweakhumansarecomparedwithavolcano,hurricaneorearthquake?Inyourgroupsdiscusswayshumanbeingsprotectthemselvesfrompowerfulnaturalforces.,Groupdiscussion,P332,Wecanhelplessenthedamageandlossescausedbyitthroughcombinedeffortsofriskassessment(评估)andearlywarning.,Weshoulddomor