Unit+5+Revealing+nature+Starting+out+Understanding+ideas高中英語外研版（2019）選擇性必修第一冊(cè)

Unit5RevealingnatureStartingoutLearningobjectivesacquiresomeinformationaboutsomeanimals，plantsandanaturalistbyviewing,readingandsharing;concludeDarwin’spersonalqualitiesbyanalyzinganddiscussing.Shareabouthowthe

spiritofscientificexplorationinfluencesourlifeandstudy.Bytheendofthislesson,wewillbeableto:Activity1FreetalkWhatdoyouthinkthetitle“revealing

nature”means?tomakeunknownorsecretinformationknowntoothers2.Whatdoyouexpecttolearnfromit?3.Whyshouldwerevealnature?plants,animals,landscapes,andotherthingsexistiingintheuniversebutnotmadebypeopleTodiscoversomesecretsofit,toknowitbetter,tomakebetteruseofit,toliveharmoniouslywithit.Activity2ReadandfindoutReadthepicturesandintroductionstothethreeanimalsandshareyourideaswithus.Whatdoes‘unusual’mean?Komododragon科莫多蜥蜴Duck-billedplatypus鴨嘴獸Nautilus鸚鵡螺Activity2ReadandfindoutTheKomododragonisthelargestlizardintheworld.

Itcangrowtothreemetresinlengthandcanweighabout135kilograms.

Despiteitssizeandweight,itcanrunforshortdistancesatupto20kilometresperhour.Whatinformationcanyougetaboutthem?animaltypeappearanceorigindiscoveryfeatureKomododragonlizardItcangrowtothreemetresinlengthandcanweighabout135kg.Theancestorofitevolvedin...andspread...,reaching...900,000yearsagao.Theywerefirstencounteredby...in1910.thelargestDuck-billedplatypusNautilusActivity2ReadandfindoutTheKomododragonisthelargestlizardintheworld.

Itcangrowtothreemetresinlengthandcanweighabout135kilograms.Despiteitssizeandweight,itcanrunforshortdistancesatupto20kilometresperhour.Theduck-billedplatypusisasmallegg-layingmammal(upto60cminlength)foundonlyinEasternAustraliaincludingTasmania.Asitsnamesuggests,ithasamouththatlookslikeaduck’sbill,whileitsthickfurandflattailaresimilartothoseofabeaver（海貍）.Asoneoftheoldestseaanimalsintheworld,

thenautilushashardlychangedinabout500millionyears,andthatiswhyitisoftengiven

thename“l(fā)iving

fossil”.Whatinformationcanyougetaboutthem?Activity2ReadandfindoutanimaltypeappearanceorigindiscoveryfeatureKomododragonlizardItcangrowtothreemetresinlengthandcanweighabout135kg.Theancestorofitevolvedin(somewhere)...andspread...,reaching...900,000yearsagao.Theywerefirstencounteredby...in1910.thelargestDuck-billedplatypusmammalupto60cminlengthIthasamouththatlookslikeaduck’sbill,whileitsthickfurandflattailare

similartothoseofabeaver.Theoldestdiscoveredfossilofthemodernplatypusdatesbacktoabout100,000yearsago....judgedit...inthelate18thcentury.egg-layingmammalappearanceNautilusseaanimalIthas

hardlychanged

inabout500millionyears.Fossilrecordsindicatethat...theoldest,alivingfossilWhatinformationcanyougetaboutthem?Activity2ReadandfindoutReadthepicturesandintroductionstothethreeanimalsandshareyourideaswithus.Shareyourideaswithus.Introduceoneofthesethreeanimalsbyreorganizetheinformation.animaltypeappearanceorigindiscoveryfeatureWhydoestheseanimalsunusual?Activity3WatchandanswerWatchthevideoandanswerthefollowingquestions.Whatisthewaythatseedstravel?Whatseedsarementioned?Howdotheytravel?Whydotheseseedstravel?Howseedstravel?Howcanseedstravel?

Seedscanetravelgreatdistancesbybeingcarriedbythe_________,uponthe____________,__________or__________.windwateranimalspeople2.Howcanthisbenefitplants?Seedshavea__________(better/worse)chanceatlifewhentheyare________(closer/further)awayfromtheirparentplant.Growingtoo_________(far/close)totheparentplantmeansseedsmightnotgetenough_______,________andnutrientsfromthe_______.Aspeciesis________(more/less)likelyto_________ifitsmembersaremore________(closely/widely)spread.betterfurtherclosesunwatersoilmoresurvivewidelyActivity4WatchandanswerWatchagainandfocusonthefollowingquestion.Whatisthespeaker’spurposeinintroducingthetraveloftheseseeds?Learnfromthenaturalworld:

branchoutandexplorethevariouswondersofnatureWhatisthestructuralfunctionofthefirstfoursentences?Whatisthestructuralfunctionofthelasttwosentences?HowseedstravelSpecificGeneralSeedscantravelgreatdistance.HowWhyBythewindByanimalsuponthewatermaple

seedscoconutsdigestivesystemhaveabetterchance

atlifeGeneralLearnfromthenaturalworld:

branchoutandexplorethevariouswondersofnatureTodiscoversomesecretsofit,toknowitbetter,tomakebetteruseofit,toliveharmoniouslywithit.HowSeedsTravel

Plantscannotmovefromplacetoplace,butseedscan.

Theycantravelgreatdistances.Theymaybecarriedbythewindoruponthewater.

Theymayalsobecarriedbyanimalsorpeople.Seedsthatarecarriedbythewindoftenhavespecialshapes.Mapleseedshavewingsthatspinandkeepthemintheairforlongerallowingthemtolandinallkindsofplaces.Dependingonthestrengthofthewind,

theycansometimestravelforhundredsofkilometres.

Coconutsarecarriedalongbyoceancurrents.

Whenacoconutfallsfromatreeontothebeach,theseapicksitupathightideandcarriesitawaytogrowsomewhereelse.Itshardshellallowsittofloatonthewaterforalongtime.Anotherwayforseedstotravelisthroughthedigestivesystemsofanimals.

Manyplantsproducefleshyfruitsthatanimalsliketoeat.Theanimalreceivesthenutrientsofthefruit,

butitdoesnotdigesttheseed,whichispassedoutsometimelater.Ofcourse,animalsmove,sotheseedcaneasilyendupalongwayawayfromtheparentplant,

especiallyifthefruitiseatenbyabird.

Infact,seedshaveabetterchanceatlifewhentheyarefurtherawayfromtheirparentplant.Growingtooclosetotheparentplantmeansseedsmightnotgetenoughsun,waterandnutrientsfromthesoil.

Also,

aspeciesismorelikelytosurviveifitsmembersaremorewidelyspread.That'swhynaturehascomeupwithallsortsofdifferentwaysforseedstotravel.

Howandwhyseedstravelarejustsomeexamplesofthewonderfulwaysinwhichnatureworks.Perhapswecanlearnsomethingfromthenaturalworldbybranchingoutandexploringthevariouswondersofnature.Unit5RevealingnatureUnderstandingideasActivity1ViewandtalkWhatisevolution?Whatspeciesdoyourecogniseinthepictureintheevolutionarytree?(P50)?Whatisthedirectionofevolution?Whatfactorscancausetheprocessofevolution??Readthispictureandtalkaboutthefollowingtopics.animalsplantszebra斑馬(哺乳動(dòng)物）birdturtle海龜(爬行動(dòng)物)fishcrab螃蟹(爬行動(dòng)物)snail蝸牛(軟體動(dòng)物)earthworm蚯蚓

(環(huán)節(jié)動(dòng)物)flatworm(扁形動(dòng)物）poaramecium草覆中(單細(xì)胞生物)frog青蛙(兩棲動(dòng)物)starfish(棘皮動(dòng)物)jellyfish

水母腔腸動(dòng)物algae(藻類)algae(藻類)moss(苔鮮)gymnosperms裸子植物angiosperm

被子植物humannaturalselection(自然選擇)theresultofnaturalcompetition(自然競(jìng)爭(zhēng))geneticmutation

(基因突變)higherformsoflifelowerformsoflifeevolveevolution

4.Whatfactorscancausetheprocess

ofevolution?3.Whatisthedirectionofevolution?ReadthesepicturesanddrawanevlolutiontreeinEnglishActivity2ReadandknowReadtheintroductiontoCharlesDarwinandgetsomeinformationabouthim.CharlesDarwinCharlesDarwinandhisTheoryofEvolutionCharlesDarwin(1809-1882)wasanEnglishgeologistandnaturalist.InhisfamousbookOntheOriginofSpecies,Darwinproposedthetheorythatorganisms(individuallifeforms)evolveextremelyslowly.Hestatedthattheorganismsthatwerebettersuitedtotheirenvironmentswouldsurviveandpassontheirfavourablecharacteristicstothenextgeneration,whilethelesssuitableorganismswouldgraduallydieout.Hecalledthisprocess“naturalselection.”WhatinformationcanwegetaboutCharlesDarwin?

Activity3Predict，readandfindoutLookatthepictureandthetitleandguess1.Whosejourneywasit?2.Whatdidhediscover?AJourneyofDiscoveryActivity3Predict，readandfindoutReadthispassageandfindouttheanswerstothefollowingquestions.Whatismainlytalkedaboutinthispassage?What’sthegenre/styleofthispassage?Inwhatorderisthepassagedeveloped?

Choosethemainideaofthepassageandgiveyourreasons.

Darwin’sinterestinvariouslivingthingsmadehimagreatnaturalist.Darwin’sjourneyontheBeagleinspiredhistheoryofevolution.Darwinwentonajourneytoconfirmhistheorythathumanshadevolvedovertime.Activity3ReadandfindoutActivity3ReadandfindoutbeforethejourneyduringthejourneyafterthejourneyPara1:Labels

on

a

young

manHewas__________________.

Hewasayoungman_____________________________________________________________________.Hewas_______________________________________________________incaptain’seyesin

common

people’s

eyesinhisfamilies’eyes

notthefirstchoicewhohadleftmedicalschoolwithoutcompletinghisdegree

adisgracetohimselfandallhisfamilyBeforethejourneyActivity3ReadandfindoutReadPara1andfinddetailed

informationabouttheyoung

man.Activity4ReadandfindoutWhatwastheimpressionofthisyoungmanforthejourney?inthecaptain'seyesincommonpeopleseyesinhisfatherseyesHewasnotthecaptain'sfirstchoice.Hewasayoungmanwho

hadleftmedicalschool

withoutcompletinghis

degree.Hewouldbeadisgraceto

himselfandallhisfamilylabelsonthe

youngmanWhatwasthisyoungmaneventually?inquestiongeologistandnaturalishActivity4ReadanddrawReadthepassageagainanddrawaroutemapshowingDarwin’sjourneyofdiscovery.

（stages，experiences,discoveryandideas）OnhisjourneyDevelopideasGenerateideasProposeatheoryLookformoreevidencePublishhistheorySignupforthejourneySignupforthejourneyOnhisjourneyGenerateideasLookformoreevidenceDevelopideasProposeatheoryPublishhistheoryActivity4ReadandanalyzeNumbertheprocessofhisjourneyinorderindependentlyangdthenshareanswerwithclass.FillintheblanksinExercise4onPage52.Whatdidhedointhethejourney?12345Hestudiedvariouslivingthingsintheirnaturalenvironmentsandsamplesofplantsandanimalshehadcollectedverysimilartoeachothercometoexist?Maybeanimalsevolvedastheyadaptedto

theirchangingenvironments?thattherewasadifferencebetweenthefinchesoneachoftheisland.hadevolvedaccordingtowhatfoodwasavailableon

thatparticularisland.thatthefincheshadevolvedfromacommonancestor,andithadslowlyevolvedintomanynewspecies.hadevolvedfromlowerformsoflifeActivity5Read,andretellRequirements:Retellthepassageaccordingtotheformbelowusingasmanynewwordsandexpressionsaspossible.SignupforthejourneyOnhisjourneyGenerateideasLookformoreevidenceDevelopideasProposeatheoryPublishhistheoryRetellthediscoveryjourneyofDarwinindependentlyandthensharewithclass.What’stheinfluenceofOntheOriginofSpecies?Activity4ReadandanalyzeActivity7AnalyzeandunderstandWhat’syourunderstandingofthetitleAJourneyofDiscovery?Howdoyouthinkthehumanspecieswillevolveinthefuture?WhatkindofpersondoyouthinkDarwinwas?Howcanyoutellthat?(supportingevidence)3.Workingroupsanddiscussthefollowingtopic.Howdoyouunderstandthetitle?AJourneyofDiscoveryAtripfromoneplacetoanothertheprocessofdiscoveringhisTheoryofEvolutionPunDarwinwasadeterminedman.Hehadstrongcuriosityandinterest

inscienceandwasgoodatthinkingandmakingdiscoveries.3.WhatkindofpersondoyouthinkDarwinwas?Why?1831theBeaglestarted

his

journeySouthAmerica,askedhimselfquestions(generatedide