Unit7Thenaturalworld

WelcometotheunitWhatcanyouseeinthepicture?Wecanseeawhitebirdflyingoverthewater.Wheredoesthiskindofbirdliketolive?Inopenareaswithwater,likewetlands(濕地).Whatisanecosystem?Anecosystem(生態(tài)系統(tǒng))islikeacommunitywherelivingthingsandnon-livingthingsworktogether.Whatdifferenttypesofecosystemsdoyouknow?forestsoceanswetlandsgrasslandspolarregions(地區(qū))Whatcanyouseeinthispicture?Rainforestsarehometooverhalfofallthetypesofanimalsandplantsonearth.Rainforestecosystem...的家園Coralreefslooklikerocks,buttheysupportalotoflifeinjustasmallarea./ri?f/n.

礁/?k?r?l/n.

珊瑚OceanecosystemWhatcanyouseeinthispicture?GrasslandecosystemwideopenareaswithgreengrassandafewtreesGrasslandsoftenliebetweendesertsandforests.Whatcanyouseeinthispicture?v.

位于PolarecosystempenguinsstandontheiceTheiceishometoanimalslikepolarbearsandpenguins./?pe?ɡw?n/n.

企鵝Whatcanyouseeinthispicture?A.FunfactsaboutecosystemsrainforestecosystemoceanecosystemgrasslandecosystempolarecosystemWhatothertypesofecosystemsdoyouknow?desertstundra(苔原)ecosystemtreeholeecosystemBListeningWhataretheytalkingabout?ListentoKittyandDavid’sconversationandanswerthequestions.Ecosystems.Grasslandsanddeserts.Whatecosystemsarethey?Readinroles/?kla?m?t/n.氣候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……”,引出結(jié)果狀語從句。其中so是副詞修飾形容詞或副詞。如:ThebagissoheavythatIcannotcarryit.

這個(gè)袋子太重了，我提不動(dòng)。1.Yes,theclimateindesertsisso

awfulthatonlyafewanimalsandplantscanlivethere.并列連詞and、but、or和so我們可以用并列連詞and、but、or和so來連接單詞、短語或者句子。如:OurEnglishteacheriskindandhelpful.我們的英語老師既和藹又樂于助人。Theboyisnotverytallbutherunsveryfast.這個(gè)男孩個(gè)子不是很高，但跑得很快。Doyouoftengohomeonfootorbybicycle?你通?；丶沂遣叫?，還是騎自行車?2.Coralreefslooklikerocks,buttheysupportalotoflifeinjustasmallarea.注意:并列連詞可以用來表示并列關(guān)系、轉(zhuǎn)折關(guān)系、選擇關(guān)系或因果關(guān)系等。并列連詞and意思是“和,又”,表達(dá)并列關(guān)系。如:Mikelikesplayingfootballandsingingsongs.

邁克喜歡踢足球和唱歌。并列連詞but意思是“但是”,表達(dá)轉(zhuǎn)折關(guān)系,所連接的成分意思往往相反或相對(duì)。如：Theroomwassmallbutcomfortable.房間雖小,但很舒適。并列連詞or意思是“或者”,表達(dá)選擇關(guān)系。如:

Whichdoyoulikebetter,juiceorcoffee?果汁和咖啡,你更喜歡哪一個(gè)?注意:在否定句中并列成分通常用or連接,而不用and。如:IcannotspeakJapaneseorFrench.我不會(huì)說日語和法語。并列連詞so意思是“因此,所以”,表達(dá)因果關(guān)系,常用來連接兩個(gè)簡(jiǎn)單句。如:Itbegantorain,sowewenthome.開始下雨了,所以我們就回家了。注意:并列連詞so和從屬連詞because(因?yàn)?不能一起使用。Thedogwashungry,sowegaveitsomethingtocat.(√)Becausethedogwashungry,sowegaveitsomethingtoeat.(×)一、翻譯句子世界上一半的動(dòng)植物生活在熱帶雨林中。2.珊瑚礁看起來像巖石，但它們?cè)诤苄〉膮^(qū)域內(nèi)維持著眾多生命。3.草原通常位于沙漠和森林之間。Halfoftheworld’sanimalsandplantsliveinrainforests.Coralreefslooklikerocks,buttheysupportalotoflifeinjustasmallarea.Grasslandsoftenliebetweendesertsandforests.當(dāng)堂檢測(cè)

二、根據(jù)句意及所給的漢語提示寫出單詞1.The

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

(企鵝)liveinverycoldplaces.Theyhavethickfeatherstokeepwarm.4.Weshouldkeepthebalanceofthe_____________(生態(tài)系統(tǒng)).5.Itis

(自然的)thatpeopleclosetheireyeswhenseeingstronglights.coralPenguinsclimateecosystemnatural1.Wewatcheda__________showatthezooyesterday.2.__________arehometomanyfishandotherseaanimals.3.Plants,fishesandthesunarepartofthe__________ofthislake.4.Theheavy__________couldhelptheplantsgrow.5.Thisareaisfamousforitsextremely(極端地)dry__________.penguinCoralreefsecosystemrainfallclimate,penguin,rainfall,ecosystem,coralreefsclimate選詞填空三、填空題Theclimateindesertsis______awful______onlyafewanimalscansurvive.Coralreefslooklikerocks,