九年级Unit 13 Section A (3a).ppt

,?,?,?,?,?,?,?,Travelling,Frank,20,165052821,dogs,10,40,me,Aguessinggame,Unit13SectionA(3a),Foodchainisanimportantpartoftheecosystem.,(生态系统),foodchain,Doyoulikepandas?,A.Yes.B.No.,Shouldwebefriendlytopandas?Shouldwesavethepandas?,A.Yes.Theyareendangeredanimals.Ifwedontsavethem,theywilldisappearsoon.,B.No.Therearestillmanypandasontheearth.Thereisnoneedtosavethem.,LetsgotravellingNOW!,shark,fin,fins,Somepeoplethinkthatsharksarecruel.,Sharksareatthetopofthefoodchainintheoceansecosystem.,Doyoulikesharks?,A.Yes.,B.No.,Shouldwebefriendlytosharks?Shouldwesavethesharks?,Yes.Sharksareindanger.Ifwedontsavethem,theywilldisappearsoon.,No.Sharksareverystrong.Theyarecruelanddangerous.Thereisnoneedtosavethem.,Read3aquicklyandfindoutthewritersopinion.,Shouldwesavethesharks?,Savethesharks!,Proposing(提出),Savethesharks!,Analyzing(分析),Solving(解决),ReadPara.1andthink.,1.Haveyouheardofsharkfinsoup?,2.Whereissharkfinsouppopular?,1.Haveyouheardofsharkfinsoup?,Whatissharkfinsoup?,鱼翅，就是鲨鱼鳍中的细丝状软骨，形似粉丝,取材于鲨鱼的背鳍、胸鳍、尾鳍。鱼翅价格昂贵，在高档酒店，每份鱼翅羹(sharkfinsoup)约800-1500元人民币。鱼翅本身并没有什么味道，烹制时要用许多调味品给鱼翅赋味。,2.Whereissharkfinsouppopular?,ItispopularinsouthernChina.,Whydoesthewritersay“Youarekillingawholesharkeachtimeyouenjoyabowlofsharkfinsoup”?,LetsreadPara.2andfindtheanswer.,1.Whatdopeopledowithsharkswhentheycatchthem?(and)2.Whatdoyouthinkoffinning?(notonly,butalso)3.Howmanysharksarecaughtandtradedeveryyear?4.Howmuchhavethenumbersofsomekindsofsharksfalleninthelast20-30years?,ReadPara.2andanswerthequestions.,1.Whatdopeopledowithsharkswhentheycatchthem?(and),Theycutofftheirfinsandthrowthesharksintotheocean.,Why?,Sharkfinsareveryexpensive.Butthesharkmeatdoesnttastegood,itisverycheap.Inordertosavethespaceformorefins,whichmeansmoremoney,peoplejustcutoffthesharksfinsandthrowthembackintotheocean.Thisiscalled“finning”.,2.Whatdoyouthinkoffinning?(notonly,butalso),Whathappentothesharksaftertheirfinsarecutoff?,Withoutafin,asharkcannolongerswimandslowlydies.,Thisisnotonlycruel,butalsoharmfultotheenvironment.,cruel,harmful,=,=,abowlofsharkfinsoup,thelifeofawholeshark,2.Whatdoyouthinkoffinning?,cruel,harmful,Whyisitharmfultotheenvironment?,Sharksareatthetopofthefoodchainintheoceansecosystem.Iftheirnumbersdroptoolow,itwillbringdangertoalloceanlife.,SavingSharksissavingourselves!,3.Howmanysharksarecaughtandtradedeveryyear?4.Howmuchhavethenumbersofsomekindsofsharksfalleninthelast20-30years?,Around70millionsharksarecaughtandtradedeveryyear.,Thenumbersofsomekindsofsharkshavefallenbyover90%inthelast20-30years.,Savethesharks!,Itisnotonly,butalsotothe,Withoutafin,asharkcanswimand,Sharksareatthetopoftheintheoceans.Iftheirnumberstoolow,itwillbringtoalloceanlife.,Aroundmillionsharksareandeveryyear.,Whenpeoplecatch,theytheirfinsandthesharkbackintothe.,Proposing(提出),Analyzing(分析),Solving(解决),Whatdotheenvironmentalprotectiongroupsaroundtheworlddotofightagainst“finning”?2.Haveanyscientificstudiesshownthatsharkfinsaregoodforhealth?,ReadPara.3andanswerthequestions.,Theyareteachingthepublicaboutfinning.Theyhaveevenaskedthegovernmentstodeveloplawstostopthesaleofsharkfins.,No.,Whatsthefact?,科学研究显示，鱼翅中胶原蛋白含量虽然很高，但缺少一种必需的氨基酸(色氨酸)，不容易被人体吸收。鱼翅的营养价值还不如牛奶，鸡蛋。另外，鱼翅被汞等有毒重金属污染的程度高达70%。鲨鱼处在食物链顶端，因此它们体内积聚的有毒物质常常超出正常允许含量的数十倍。,=,Whyeatfins?,Savethesharks!,Itisnotonly,butalsotothe,Withoutafin,asharkcanswimand,Sharksareatthetopoftheintheoceans.Iftheirnumberstoolow,itwillbringtoalloceanlife.,Aroundmillionsharksarecaughtand,Whenpeoplecatch,theytheirfinsandthesharkbackintothe.,Proposing(提出),Analyzing(分析),Solving(解决),Environmentalprotectiongroupsarethepublicabout.Theyhaveaskedthetodeveloptostoptheofsharkfins.,Shouldwebefriendlytosharks?Shouldwesavethesharks?,Yes.Sharksareindanger.Ifwedontsavethem,theywilldisappearsoon.,No.Sharksareverystrong.Theyarecruelanddangerous.Thereisnoneedtosavethem.,SavetheSharks!,Whatcanpeopledotosavethesharks?,Asamiddleschoolstudent,whatcanyoudotosavethesharks?,Letshaveadiscussioningroups.,Letswriteaproposal(倡议书).,Whatshouldwedo?,Proposing(提出),Analyzing(分析),Solving(解决),Aproposal(倡议书).,Proposing(提出),Savethetigers!,Analyzing(分析),Solving(解决),Peoplearekillingtigersfortheirskinandbones.Thisisnotonlycruel,butalsodoharmtotheenvironment.Tigersareatthetopofthefoodchainintheforestecosystem.Iftheirnumbersdroptoolow,itwillbringdangertoallforestlife.,Letstellpeopleitisimportanttosavethetigers.Wecanalsoaskthegovernmenttodeveloplawstoprotecttigers.Notrading,nokilling!,Proposing(提出),Donteatsharkfinsoup!,Analyzing(分析),Solving(解决),Notrading,nokilling!,Savethewildanimals!,Proposing(提出),Savetheelephants!,Analyzing(分析),Solving(解决),killforivory,cutoff,notonly,butalso,playanimportantpartinfoodchain,Ifdrop