外研版（2019） 必修第一册 Unit 5 Into the Wild Understanding ideas课件

B1U5UnderstandingideasThemonarch’sjourneyDoyouknowthenamesoftheseanimals?monarchbutterflySiberiancrane

redpandaAtlanticsalmon

KillerwhaleAfricanlionChoosetheanimalsthatmigratemonarchbutterflySiberiancrane

redpandaAtlanticsalmon

KillerwhaleAfricanlion(certaintypes)Animalmigration1Whatdoyouknowaboutanimalmigration?P66,Activity1Animalmigrationreferstothemovementofaspeciesfromonehabitattoanotherinresponsetoseasonalchangestotheenvironment.Oftencoveringgreatdistancesandinvolvinghugenumbersofanimals,itcanbefascinatingtoobserve.Migrationhappensinallpartsoftheanimalkingdom,fromfishandinsectstobirds,reptiles(爬行动物)andmammals(哺乳动物).ReadformainideaReadthepassageandfindoutwhatmysterythescientistshavesolved.P66,Activity2Howmonarchbutterfliesmanagetotravelalongdistanceandfindtheirwaytotheirdestination.ReadformainideaWhatisthewritingstyleofthispassage?narrative 记叙expository 说明argumentative议论ReadformainideaChoosewhereyouaremostlikelytofindthepassage.P68,Activity31Inascientificresearchpaperaboutthemonarchbutterfly’smigration.2Inapopularnaturemagazineintroducingthemonarchbutterfly.3InatravelleafletencouragingpeopletovisitNorthAmerica.Howcanyoutell?TheMonarch’sJourneyReadfordetailsCompletethesentenceswithexpressionsfromthepassage.P69,Activity4aThemonarchbutterflyisabletotell1

.bUsingthesetwopiecesofinformation,themonarchbutterflydetermines2

.cThemonarchbutterflymeasures3

withitseyes.dThemonarchbutterflyreaches4

.eHumans5

trees.fThe6

wheremonarchscanbefoundisdestroyed.gHumansusechemicalsthat7

thatmonarchcaterpillarseat.hThemonarchbutterfly’spopulation8

inthelastfewyears.thetimeofthedaythewaytogothepositionofthesuntheplaceswhereitwillspendthewintercutdownnaturalenvironmentofmanyplaceskilltheplantshascrashed(byasmuchas90percent)ReadforstructureParagraphs1

and2brieflyintroduced

.Paragraphs3,4,and5aremainlyorganisedby

(order).ChronologicalOrder(TimeOrder)SpatialOrderCause-EffectOrdermigrationandmonarchbutterfliesReadforstructureUsethesentencestocompletethe“cause-effect”flowcharts.P69,Activity4Themonarchbutterflyisabletotellthetimeoftheday.Themonarchbutterflymeasuresthepositionofthesunwithitseyes.Usingthesetwopiecesofinformation,themonarchbutterflydeterminesthewaytogo.Themonarchbutterflyreachestheplaceswhereitwillspendthewinter.ReadforstructureUsethesentencestocompletethe“cause-effect”flowcharts.P69,Activity4Humanscutdowntrees.Humansusechemicalsthatkilltheplantsthatmonarchcaterpillarseat.Thenaturalenvironmentofmanyplaceswheremonarchscanbefoundisdestroyed.Themonarchbutterfly’spopulationhascrashedinthelastfewyears.ThinkandshareThinkandShareWhyandhowshouldpeopleprotectwildanimals?Cause-Effecttransitions:consequently,asaresult/consequence,therefore,hence,thus,sodueto,owingto,thanksto,becauseof,since,asGoldenSnub-nosedMonkeySnowLeopardGiantPandaThinkandshareAtpresent,thereexistsanaccelerationoftheglobalextinctionofspecies.…Itfallstoallofustoacttogetherandurgentlytoadvanceprotectionanddevelopmentinparal