Unit7ThenaturalworldWeletotheunit课件译林版英语八年级上册()-1

Unit7Thenaturalworld

WelcometotheunitWhatcanyouseeinthepicture?Wecanseeawhitebirdflyingoverthewater.Wheredoesthiskindofbirdliketolive?Inopenareaswithwater,likewetlands(湿地).Whatisanecosystem?Anecosystem(生态系统)islikeacommunitywherelivingthingsandnon-livingthingsworktogether.Whatdifferenttypesofecosystemsdoyouknow?forestsoceanswetlandsgrasslandspolarregions(地区)Whatcanyouseeinthispicture?Rainforestsarehometooverhalfofallthetypesofanimalsandplantsonearth.Rainforestecosystem...的家园Coralreefslooklikerocks,buttheysupportalotoflifeinjustasmallarea./riːf/n.

礁/ˈkɔrəl/n.

珊瑚OceanecosystemWhatcanyouseeinthispicture?GrasslandecosystemwideopenareaswithgreengrassandafewtreesGrasslandsoftenliebetweendesertsandforests.Whatcanyouseeinthispicture?v.

位于PolarecosystempenguinsstandontheiceTheiceishometoanimalslikepolarbearsandpenguins./ˈpeŋɡwɪn/n.

企鹅Whatcanyouseeinthispicture?A.FunfactsaboutecosystemsrainforestecosystemoceanecosystemgrasslandecosystempolarecosystemWhatothertypesofecosystemsdoyouknow?desertstundra(苔原)ecosystemtreeholeecosystemBListeningWhataretheytalkingabout?ListentoKittyandDavid’sconversationandanswerthequestions.Ecosystems.Grasslandsanddeserts.Whatecosystemsarethey?Readinroles/ˈklaɪmət/n.气候ReadaloudBReadandfillintheblanks.

GrasslandsDesertsClimate─It’sdrywithlittle(3)________.There’shugedifferencein(4)________betweendayandnight.Animals&plantsGrasslandsindifferentplacesarehometodifferentanimals,like(1)________inInnerMongolia,but(2)________inAfrica.(5)________animalsandplantscanlivethere.Thedesertplantskeepwaterintheir(6)________,andmanyanimalscangetwaterfromtheseplants.horsesandcowslionsandgiraffesraintemperatureOnlyafewleavesC.Whatotherfunfactsaboutecosystemsdoyouknow?Oceanscoverabout71%oftheearth'ssurface,makingthemthelargestecosystemonearth.Grasslandshaveveryfewtreesbutlotsoftallgrassesandwildflowers.Indeserts,someplantscanlivewithoutrainforyears.PolarbearsliveintheNorthPole,andpenguinsliveintheSouthPole.A:Doyouknowanythingaboutecosystems?B:Yes!Iknowthat…indifferentplacesarehometo...In...,thereare...,butin...,thereare...A:Oh,really?Doyouknowanythingabout…?B:Well,…it’s...And...A:Yes,theclimatein...is...B:It’strue.Theyhelp…andgivefoodto...MakeupanewdialogueDiscussion:Whyisitimportanttoprotecttheenvironment?Totreattheearthkindlyistotreatoneselfkindly.句中的so...that...意思是“如此……以至于……”,引出结果状语从句。其中so是副词修饰形容词或副词。如:ThebagissoheavythatIcannotcarryit.

这个袋子太重了，我提不动。1.Yes,theclimateindesertsisso

awfulthatonlyafewanimalsandplantscanlivethere.并列连词and、but、or和so我们可以用并列连词and、but、or和so来连接单词、短语或者句子。如:OurEnglishteacheriskindandhelpful.我们的英语老师既和蔼又乐于助人。Theboyisnotverytallbutherunsveryfast.这个男孩个子不是很高，但跑得很快。Doyouoftengohomeonfootorbybicycle?你通常回家是步行，还是骑自行车?2.Coralreefslooklikerocks,buttheysupportalotoflifeinjustasmallarea.注意:并列连词可以用来表示并列关系、转折关系、选择关系或因果关系等。并列连词and意思是“和,又”,表达并列关系。如:Mikelikesplayingfootballandsingingsongs.

迈克喜欢踢足球和唱歌。并列连词but意思是“但是”,表达转折关系,所连接的成分意思往往相反或相对。如：Theroomwassmallbutcomfortable.房间虽小,但很舒适。并列连词or意思是“或者”,表达选择关系。如:

Whichdoyoulikebetter,juiceorcoffee?果汁和咖啡,你更喜欢哪一个?注意:在否定句中并列成分通常用or连接,而不用and。如:IcannotspeakJapaneseorFrench.我不会说日语和法语。并列连词so意思是“因此,所以”,表达因果关系,常用来连接两个简单句。如:Itbegantorain,sowewenthome.开始下雨了,所以我们就回家了。注意:并列连词so和从属连词because(因为)不能一起使用。Thedogwashungry,sowegaveitsomethingtocat.(√)Becausethedogwashungry,sowegaveitsomethingtoeat.(×)一、翻译句子世界上一半的动植物生活在热带雨林中。2.珊瑚礁看起来像岩石，但它们在很小的区域内维持着众多生命。3.草原通常位于沙漠和森林之间。Halfoftheworld’sanimalsandplantsliveinrainforests.Coralreefslooklikerocks,buttheysupportalotoflifeinjustasmallarea.Grasslandsoftenliebetweendesertsandforests.当堂检测

二、根据句意及所给的汉语提示写出单词1.The

(珊瑚)inthesea,whichisverybeautiful,isindanger.2.Risingglobaltemperaturesarechangingtheearth's________(气候)greatly.3.

(企鹅)liveinverycoldplaces.Theyhavethickfeatherstokeepwarm.4.Weshouldkeepthebalanceofthe_____________(生态系统).5.Itis

(自然的)thatpeopleclosetheireyeswhenseeingstronglights.coralPenguinsclimateecosystemnatural1.Wewatcheda__________showatthezooyesterday.2.__________arehometomanyfishandotherseaanimals.3.Plants,fishesandthesunarepartofthe__________ofthislake.4.Theheavy__________couldhelptheplantsgrow.5.Thisareaisfamousforitsextremely(极端地)dry__________.penguinCoralreefsecosystemrainfallclimate,penguin,rainfall,ecosystem,coralreefsclimate选词填空三、填空题Theclimateindesertsis______awful______onlyafewanimalscansurvive.Coralreefslooklikerocks,