Unit4SectionA(1a-2d)课件人教版英语八年级下册-1

SectionA(1a-2d)TheWondersofNatureUnit4Inthisunit,youwill1.talkaboutgeographyfactsandnaturalwonders.2.comparefactsaboutfamousplaces.3.sharegeographyfactsusinglargenumbers.4.explorehowandwhypeopleconnectwithnature.Mastervocabularyrelatedtogeographyfactsanduselargenumbers,describenaturalwondersinEnglish.

Usespecialquestions(What'sthe...?/How...isit?)toaskandansweraboutfactsofplaces.Enhancedeepunderstandingofnaturalphenomenathroughcomparison,analysis,andreasoning.Improvecomprehensivelanguageapplicationskillsthroughlistening,speaking.LookandshareDoyouknowthenameofthewaterfallinthephoto?It’sVictoriaFalls.Whatdoyouthinkisspecialaboutit?LargeandwideontheZambeziRiver(赞比西河),betweenZambia(赞比亚)andZimbabwe(津巴布韦)insouthernAfricaoneofAfrica’slargestwaterfalls,about1,700meterswideandupto108metershigh.LookandshareWhatothernaturalwondersdoyouknow?/ˈnætʃrəlˈwʌndəz/Naturalwonders

areamazing,uniquethingsmadebynature(nothumans).Theyareoftenverybig,beautiful,orspecial.____NileRiver____AngelFalls____MountQomolangma____Deadsea____SaharaDesert____MarianaTrenchMatchtheplaceswiththepictures.1aFADCEB马里亚纳海沟安赫尔瀑布尼罗河BECFDAbelowthesealevelPre-listening

Todaylet’sjoinagameshow.I’mthehost.

Canyouguesswhatitisabout?GeographychallengePlaceDescriptionMountQomolangmathe________________intheworldSaharaDesertthe

intheworldDeadSeathe

onearthMarianaTrenchthe________________intheoceanhighestmountainbiggestdesertlowestplacedeepestpointListentothegameshow.Completethedescriptionsoftheplaces.1bWhatdoyouknowaboutthesewonders?

HowhighisMountQomolangma?

8,848.868,848.86Doyouknowhowtoreadthelargenumbers?Let’slearnthousandpointeightsixand8,848.86:eightthousand,eighthundredandforty-eightpointeightsix41611,0009,000,000millionfourhundredandsixteeneleventhousandninemillionListenagain.Completethe

measurements.1cPlaceMeasurementMountQomolangma________metreshighSaharaDesertabout________squarekilometresinsizeDeadSea________metresbelowsealevelMarianaTrenchabout________metresdeep8,848.869,000,00041611,000Learnningtip:长、宽、高、深、面积的表达方法:基数词+单位词+形容词（long,wide,high,deep等）/介词短语（insize,belowsealevel等）Host:Welcometoourgameshow!Today,it'sallaboutgeography.Answerasquicklyasyoucan!Questionone:________________________intheworld?FuXing:It'sMountQomolangma!Host:Correct!________________?LinHongyu:Iknowthis—it's8,848.43metreshigh.Host:No,sorry.FuXing?FuXing:Isit8,848.86metres?Host:Yes!ButsomescientistssayQomolangmaisstillgrowingtaller!Now,________________________intheworld.FuXing:TheTaklimakanDesert?Host:Wrong!Ella?ListenandfillWhatisthehighestmountainHowhighisitnamethebiggestdesertWhatquestionsdidthehostask?Ella:TheSaharaDesert.Host:Right!Now,______________?Ella:It'sabout9,000,000squarekilometres.Host:That'sright!______________________onearth?LinHongyu:It'stheDeadSea!Host:Welldone!Itssurfaceis416metresbelowsealevel.Now___________________________intheocean?FuXing:It'sintheMarianaTrench.Host:That'scorrect!_________________?FuXing:It'sabout11,000metresdeep.Host:Correct!howbigisitWhat'sthelowestplacewhere'sthedeepestpointHowdeepisitListenandfill-Whatisthehighest/biggest/lowest/deepest...intheworld/onearth/intheocean?-It’s...-Howhigh/big/deepisit?-It’sabout.../Itssurfaceis...Pair-workTalkabouttheplacesyouhavelearntabout.1d8,848.869,000,00041611,0006,650kilometerslong979.6metershighA:What'sthelowestplaceonearth?B:It's...A:Howlowisit?B:Itssurfaceis...metresbelowsealevel.A:Now,what's...Youalldidagreatjobingeographychallenges!Herecomesadeep-searesearcher.Let’swelcomeandlearnmore!Areyouinterestedtheworldinthedeepsea?Let’shavealook!strangefishWhatdoyouknowaboutthedeepsea?hugepressuresubmarinescanreachLet’ssharecolddark/ˈsʌbməˌrinz/FendouzheisChina'smanneddeep-seasubmersible,whichreachedadepththatsetanewrecordforChina'sdeep-seadiving.B.DepthatwhichthedeepseabeginsC.DepthatwhichtheTitanicrestsD.DeepestdiveofawhaleTrytolablethedepthsinthepicturewiththeinformationontheleft.2aA.DepthFendouzhereachedAclassisaskingadeep-searesearchersomequestionsafterhistalk.Listenandtickthetopicstheydiscuss.2bWhatinformationcanwegetfromtheinstruction?Whoaretalkingintheconversation?Whathappenedbeforetheconversation?Studentsandadeep-searesearcher.Thedeep-searesearchergaveatalktostudents.wherethedeepseabeginswhypeopleareresearchingthedeepseawhichChinesesubmersiblediveddeeperinthewaterthanmanyotherswhatdeep-seaanimalsarelikehoweveryoneshouldprotectthedeepseaAclassisaskingadeep-searesearchersomequestionsafterhistalk.Listenandtick()thetopicstheydiscuss.2b1.Peoplestilldon'tknowmuchaboutthe_____________.2.In_____________,China'sFendouzhedivedintothedeepseaandfilmedit.3.Someanimalshaveunusualabilities.Someare_____________

butcan“see”.Somecanevencreatetheirown_______.4.Thereisrubbishevenat_____________metresdeep.Listenagain.Completethesentenceswiththefactsfromtheconversation.oceanfloor2020blindlight11,0002cListeningtip:Listenforquestionwords:

where,why,which,what,howListenfornames:Fenoduzhe(aChinesesubmersible)Listenfornumbers:

depths,years/ʌnˈjuːʒuəl/adj.不寻常的MsGao:

Thankyouforthewonderfultalk,MrJones.Now,doesanyonehaveanyquestions?Emma:Ido!Whyaresomanycountriesresearchingthedeepsea?MrJones:

Well,curiosityisonereason.Wedon'tknowenoughabouttheoceanfloor.FuXing:

Irememberthatin2020,China'sFendouzhediveddeeperintotheMarianaTrenchthanmanyothersubmersiblesintheworldandfilmedit.ButIdidn'tseeanydeep-seaanimals.Whataretheylike?MrJones:Well,manydeep-seaanimalsarelargeandunusual.Someanimalsareblind,buttheycan"see"aswellasothers.Someevencreatetheirownlight!Peter:Cool!Arethereanyothersurprisingfactsaboutthedeepsea?MrJones:Didyouknowthatthere'srubbishevenat11,000metresdeep?Thatshockedmanypeople.MsGao:That'sterrible!Weshoulddosomethingaboutit.MrJones:You'reright!Listenandthink

Whatsurprisingfactsdoyoulearn?Someanimalsareblind,buttheycan"see"aswellasothers.Someevencreatetheirownlight!There'srubbishevenat11,000metresdeep!Readthequestionsandthinkofmoreyouwouldliketoaskthedeep-searesearcher.Researchtheanswers.Thenaskandanswerthequestionswithapartner.Whatisthelargestsharkinthedeepsea?Whatisthebottomofthedeepsealike?Whyisitimportanttoresearchthedeepsea?2d/ˈbɒtəm/n.底部The

GreenlandSharkisthelargestsharkinthedeepsea.Theyaremassive,slow-movingsharksthatcanliveforhundredsofyearsandareoftenfoundinthecold,deepwatersoftheArcticandNorthAtlantic.Theycangrowover6meterslong.Let’slearnThebottomofthedeepseaiscompletelydarkbecausesunlightcannotreachit.Thetemperatureisnearfreezing.Thewaterpressureisimmense(巨大的),enoughtocrushmostsubmarines(潜艇).Muchofitiscoveredinsoft,finemudcalled"ooze(软泥)."Let’slearnWhatcanwedotoprotectthedeepsea?Let’sshare“Tosavetheearthistosaveourselves!”1.Whatothernaturalwondersdoyouknow?wonder在此处作可数名词，意为“（自然/人造）奇观”e.g.TheGreatWallisoneofthewondersoftheworld.（长城是世界奇观之一。）wonder还可以作不可数名词，意为“惊讶；疑惑”e.g.Thechildrenlookedatthemagicianinwonder.（孩子们惊奇地看着魔术师。）nowonder：难怪；不足为奇wonder还可以作动词，意为“想知道；好奇；疑惑”Languagepoints2.Itssurfaceis416metresbelowsealevel.below作介词时，强调“位置、数值、等级等处于另一事物的下方或更低水平”，不强调“垂直正下方”（对应的反义词为above）

。也可用于抽象概念（如温度、排名、标准）belowsealevel意为“低于海平面”e.g.TheDeadSeaisoneofthefewplacesonEarththatisbelowsealevel.（死海是地球上少数几个低于海平面的地方之一。）Theriverbelowthebridgeisveryclear.（桥下面的那条河很清澈。）Languagepoints3.Whyaresomanycountriesresearchingthedeepsea?research此处作是动词，意为是“研究；调查”，其后直接接研究的对象research还可作不可数名词，意为

“研究；调查”Languagepointsresearchn.研究；调查v.研究；调查（1）I’mdoingsomeresearchonChinesehistory.（2）They’reresearchingintothecausesofcancer.n.v.do/make/carryoutaresearchon/intoresearchinto4.Whatisthebottomofthedeepsealike?e.g.TheTitanicliesatthebottomoftheAtlanticOcean.fromtoptobottom：从头到尾；完全地e.g.Shecleanedthehousefromtoptobottombeforetheguestscame.bottom作名词，意为是“底部；最下部”thebottomof+名词……的底部atthebottomof...在……的底部Languagepoints1.good/well_______2.comfortable________________3.big_______4.happy________5.cheap________6.many_______7.difficult______________8.little_____________9.great_________bestmostcomfortablebiggesthappiestcheapestmostmostdifficult

leastgreatest写出下列单词的最高级。Exercise写出下列数字的英文表达。433,024856,730,45259,725fourhundredandthirty-threethousandandtwenty-foureighthundredandfifty-sixmillion,sevenhundredandthirtythousand,fourhundredandfifty-twofifty-ninethousand,sevenhundredandtwenty-fiveExercise1.It’s____________(不寻常)tofindarainforestgrowinginsuchacoldclimate.

2.Thelake’swaterissoclear