Unit 6 Bird watching 單元主題拓展閱讀 課件-牛津譯林版英語八年級上冊

Unit6

ExpandedReading八年級上冊BridwatchingtypesproblemssolutionsabilitiesAskaPigeon!

Howmuchdoyouknowaboutpigeons?Well,Iamapigeon.Sowhatdoyouwanttoknow?Q:Whydoeseverycityintheworldhavepigeons?A:

Humanshavethemselvestothank!

City

pigeonsaredescendedfromrockdoves.Longago,wildrockpigeonslivedonrockycliffs.Duringthedayweeatseedsandberries.Around5,000yearsago,humansstartedbuildingcitiesandgrowinggrain.Pigeons

likedtowns—therewaslotsofdroppedgrain

toeat,andtherewerenotmanyhawks.Citypeoplebuilthousesforpigeonstoliveintoo.Theykeptpigeonstocarrymessages,orjustaspets.Webecamehomingpigeons.Humanstooktheirpigeonswiththemallovertheworld.Sonowwe’reeverywhere.Moderncity

pigeonsareferal—animalsthatoncewerekeptbyhumans,butnowrunwild.Tallcitybuildingsarealotlikeouroldcliffs.

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Q:Howfastcanapigeonfly?A:Wecangoasfastasacaronthehighway,around97kmanhour.Andwecankeepupthatspeedforalongtime!Thefastestracingpigeoncanflyatthespeedofabout148kmperhour.Q:What’sapigeon’smostamazingskill?A:Weuseourbeakslikestrawstosuckupwater!Nootherbirdcandothat.AskaPigeon!1._____________2._____________3._____________4._____________5._____________hawkpigeonseedsgrainberrieshawkseedspigeongrainberriesAskaPigeon!QuestionsAnswersWhydoes_________haspigeons?rockdovecitypigeonsHowfastdopigeonsfly?1.asfastasa_________onthehighway2.speedofthe_________racingpigeonwhat’spigeons’mostamazingskills?Theydrinkwaterby____________,usingtheirbeaksasstraws.humanscitycarfastest148kmsuckingAskaPigeon!Whichofthesentenceisthebestchoicefortheblankinparagraph4?A.Weareveryafraid! B.Howdangeroustheyare!C.Wefeelrightathome! D.Howhighwecanfly!AskaPigeon!1.小河每年冬天變得干涸。(run)Theriver_______________________inwintereveryyear.2.我們應該保持優(yōu)良傳統(tǒng)。(keepup)____________________________________finetraditions.3.汽車正以每小時80公里的速度行駛。(ataspeedof)Thecar__________________________________________.runsdryWeshouldkeepupisrunningataspeedof80kmperhourAskaPigeon!IsitOKtofeedcitypigeons?Ifyouwerethepigeon,what’syouranswer?Long-DistanceTravellersBirdsareamazinganimals,andtheirmost

amazingskillistheirsenseofdirection.Somemigratelongdistances.Theyknowexactlywheretofly,withoutacompass!Migratingbirdsoftenflythousandsofkilometres.Theyfindtheirwaybacktothesameplaceyearafteryear.Evenyoungbirdsthathavenotmigratedbeforeseemtoknowwhichwaytogo.InEurope,youmayseebiggroupsofswallowssittingontelephonewires.Astheweathergetscolderinautumn,theygetready

toflyawaytowarmercountries.ThesebirdsflysouthtoAfricaforthewinter.TheywillreturnnorthtoEuropetobreednextsummer.Birdshavemanywaystopreparefortheirmigrationjourney.Thelittlesedgewarbler(水蒲葦鶯)doublesitsweightbyeatinglotsofinsectsjustbeforeitleavesEurope.Itflies9,000kilometres.

IttravelswithoutstoppingforfourdaystospendwinterinSouthAfrica.Bar-headedgeese(斑頭雁)breedinTibet(西藏).

TheythenflyovertheHimalayas(喜馬拉雅山)toIndia.Theyhavetoflyataheightofover6,000metrestogetoverthehugemountains.Otherbirds,suchascranes,alsoflyhighovermountains.Long-DistanceTravellers1.distance ________ A.anabilitytodothingswell2.double ________ B.tomakesth.twiceasmuch3.skill ________ C.theamountofspacebetween2placesCBALong-DistanceTravellerscranespreparemountainshowfarLong-DistanceTravellersBirdsareamazinganimals,andtheirmost

amazingskillistheirsenseofdirection.Somemigratelongdistances.Theyknowexactlywheretofly,withoutacompass!Migratingbirdsoftenflythousandsofkilometres.Theyfindtheirwaybacktothesameplaceyearafteryear.Evenyoungbirdsthathavenotmigratedbeforeseemtoknowwhichwaytogo.InEurope,youmayseebiggroupsofswallowssittingontelephonewires.Astheweathergetscolderinautumn,theygetready

toflyawaytowarmercountries.ThesebirdsflysouthtoAfricaforthewinter.TheywillreturnnorthtoEuropetobreednextsummer.Birdshavemanywaystopreparefortheirmigrationjourney.Thelittlesedgewarbler(水蒲葦鶯)doublesitsweightbyeatinglotsofinsectsjustbeforeitleavesEurope.Itflies9,000kilometres.

IttravelswithoutstoppingforfourdaystospendwinterinSouthAfrica.Bar-headedgeese(斑頭雁)breedinTibet(西藏).

TheythenflyovertheHimalayas(喜馬拉雅山)toIndia.Theyhavetoflyataheightofover6,000metrestogetoverthehugemountains.Otherbirds,suchascranes,alsoflyhighovermountains.Long-DistanceTravellers1.Accordingtothetext,whichisbird’smostamazingskill?A.Theirabilitytocatchfood. B.Theirsenseofdirection.C.Theirsenseofsmell. D.Theirflyingability.2.InEurope,youmayseebiggroupsof______sittingontelephonewires.A.sedgewarblers B.cranes C.swallows D.bar-headedgeese3.WhatdosedgewarblersdobeforetheytraveltoSouthAfrica?A.Eatalotoffood. B.Hidealotoffoodinsomeplaces.C.Trainyoungbirds. D.Practiseflying.4.Whichisrightorderaccordingtothetext?①Birdsreturnnorthtothesameplace. ②Birdsgetreadyfortheirjounery.③Birdsflytowarmercountries. ④Theweathergetscolder.A.④③②① B.③④②① C.④②①③ D.④②③①WhyAreFlamingosPink?Flamingosaretall,mostlypinkbirdswithlonglegs.Buttheyaren’tactuallybornpink.Theyaregreyorwhite,andturnpinkoverthefirstcoupleofyearsoftheirlives.Haveyoueverheardtheexpression

“youarewhatyoueat”?Well,flamingosarejustthat.Inthewild,flamingosfeedonshrimp,smallclams,fish,insects,andalgae.Yum!Thesefoods,especiallythealgae,arerichincarotenoids(類胡蘿卜素).

Insideaflamingo’sbody,carotenoidsarechangedintoared-orangepigment（色素）thatturnsitsfeatherspink.Beforescientistsunderstoodthatflamingosgottheircolourfromtheirfood,

zookeeperspuzzledoverwhythepinkbirdsturnedwhitein

zoos.

Nowtheyfeedflamingosadietrichincarotenoidsandvitaminstokeeptheirbirds

“inthepink”.Still,flamingosfadewhencaringfortheir

young.Unliketheirchicks,mamaandpapabirdsdon’teatmuch.Thisdecreasesthepigmentstoredintheirfeathers,sotheylosecolour.Ifaflamingoeatsblueberries,willitturnblue?Dr.KevinMcGraw,whostudiesfeathercolourinbirdsatArizonaStateUniversity,guessesifaflamingoeatsenoughblueberries,itwouldprobablystillturnpink,notblue!That’sbecausethepigmentsthatmakeblueberriesblue,arechangedintocolourlesschemicalsinthebird’sbody.Butblueberriesalsocontainasmallnumberofcarotenoids.Sotheywouldprobablylightlycolourthefeatherspink.WhyAreFlamingosPink?DrawyourowntextstructureWhyAreFlamingosPink?Flamingo’scolourPara1:_________toturnpinkPara3:how_________keeptheirflamingosinthepinkPara2:whyitturnspink—itscolourcomesfromthe_________iteatsPara4:whyflamingoswon’tturn_________iftheyeatblueberrieswhen/timefoodzookeepersblueWhyAreFlamingosPink?Whatcanwelearnfromthetext?A.Zookeepersfirstfoundoutwhyflamingosarepink.B.Thered-orangepigmentisstoredintheflamingo’s