Unit5ADelicateWorldUsinglanguage課件高中英語(yǔ)選擇性2

UsinglanguageUnit5AdelicateworldVocabulary+Listening+SpeakingEcosystemsLookatthediagramandanswerthequestions.Payattentiontothewordsandexpressionsinbold(黑體).1.Whatdoesthediagramshow?Thediagramshowsafoodchain(食物鏈)–theconnectionbetweenthelivingthings.Lookatthediagramandanswerthequestions.Payattentiontothewordsandexpressionsinbold(黑體).2.WhoaretheProducers,Primaryconsumers,SecondaryconsumersandDecomposers?Producers=grassesPrimaryconsumers=sheepSeconaryconsumers=wolfDecomposers=water;dissolvednutrients;fungi;bacteria,soilLookatthediagramandanswerthequestions.Payattentiontothewordsandexpressionsinbold(黑體).3.Whataretherelationshipsbetweenthelivingthings?Thelivingthingsarecloselyconnectedwitheachotherbythefoodtheyeat.1.absorb__________________2.dissolvednutrients__________________3.relyon__________________4.provideenergy__________________吸收，攝入溶解的營(yíng)養(yǎng)物質(zhì)依靠，依賴(lài)提供能量Payattentiontothewordsandexpressionsinbold.Ecosystem5.feedon______________6.preyon_______________7.breakdown

_______________8.release_______________以……為食捕食，掠奪分解釋放EcosystemPayattentiontothewordsandexpressionsinbold.CompletethepassagewiththecorrectformofthewordsandexpressionsinActivity5.absorbrelyonfedonpreyonEcosystembreakdownreleaseListening&speakingBefore-listening---BackgroundinformationExistingtimeFlyingFunctiononeoftheoldestspeciesintheecosystem;millionsofyearsflyasfastas24kmph(kilometersperhour);wingbeats200timespersecondcollectpollen(花粉)andnectar(花蜜);pollinate(授粉)asmanyas50to100flowersbee/honeybeeasbusyasabeeWhile-listening---MainideaWhile-listening---Detailspesticidesandclimatechangedecliningveryquicklyhavefallenby17%beunabletoreproduceOtherinsectsbeesareresponsibleforpollinatingabout70%woulddieout?Youmustbekidding!?Idon’tbelieveit!?

Areyousureabout...??It’safact!?Don’tforgetthat…?Checkitoutforyourself...?Accordingtostatistics...Meg:HeyOllie,haveyouheardthatthebeepopulationis___________?Ollie:No,Ihaven't.But,thinkingaboutit,I_________everseebeesthesedays.WhenIwaslittle,they_________tobeeverywhere!Meg:Ifbeesdieout,_________willdieouttoo.Ollie:What?!Youmustbe_________!Idon'tbelieveit!Meg:It'safact!!I_________anaturedocumentaryallaboutittheotherevening.Beesareveryimportanttoourfood________.Ollie:Howcanthatbe________?Humanswon'tdieoutjustbecausethere'snohoney!Meg:Beesdon'tjustmakehoney.Don'tforgetthatbeesarealso__________forpollinatingplants.Withoutthem,cropswouldbeunableto___________.聽(tīng)力文本填空declininghardlyseemedhumanskiddingwatchedsupplypossibleresponsiblereproduceOllie:Butsurelythereareotherwaysofgettingthese_______toreproduce.Doesithavetobebees?Meg:Well,thereareother_______thatpollinateplants,butit's_______thattheywouldbeabletofullycompensateforthelossofbees.Beesareresponsibleforpollinatingabout_______ofthespeciesofcrops.Ollie:Areyousureaboutthatdata?It________ratherexaggerated.Meg:Watchthedocumentaryandcheckitoutforyourselfifyoudon't________me.Withoutbees,numerousplantspecieswoulddieout.Animalsthat_________thecropswoulddieout,andwewouldn'thaveenoughtoeat.Ollie:Seriously?That's________!Butlookingonthebrightside,therearemillionsandmillionsofbees.They'renotgoingtodieoutanytimesoon.聽(tīng)力文本填空cropsinsectsunlikely70%soundsbelieveliveonscaryMeg:I'mafraidyou'rewrong.Thebeepopulationisdecliningveryquickly.___________statistics,beenumbersintheUShave________by17%injustoneyear.Ollie:Gosh!What_______that?Meg:Acombinationofthings,really,butit'smainly________damagetotheirhabitatscausedbypesticidesand_______________.Ollie:Sohuman________isthemaincause?Meg:That'sright.Ollie:Well,___________,we'dbetterdosomethingbeforeit'stoolate.聽(tīng)力文本填空Accordingtofallencausedduetoclimatechangeactivityinthatcase

Workinpairs.Talkaboutwhatwouldhappentotheecosystemifanotherspeciesdiedout.Usethew