Unit 5 Understanding ideas 课件-2022-2023学年高中英语外研版2019选择性必修第一册

Unit5Revealingnaturetomakeknownsomethingthatwaspreviouslysecretorunkown1Whatspeciesdoyourecogniseinthepicture?2Whatfactorscancausetheprocessofevolution?Theever-changingenvironmentofnature;environmentalchanges;populationimmigration;geneticmutation;culturalpreferences...lowerformsoflifehigherformsoflifeevolve---evolutionDarwin'sTheoryofEvolutionisoneofthebasicfoundationsofmodernscience.Itshowsthatplantsandanimalscanchangeovertime.Thechangesareusuallysmallanddifficulttodetect,buttheyaddupovermanygenerationsandcanresultinnewspecies.TheBritishbiologist,

naturalistandthefounderofTheoryofEvolution.Inhisearlyyears,hesailedaroundtheworldontheBeagleforfiveyears,andobservedandcollectedalotofanimals,plantsandgeologicalstructures.HepublishedtheOriginofSpeciesandputforwardthetheoryofbiologicalevolution.CharlesRobertDarwinFeb12th,1809—Apr19th,1882Readthepassageandtalkaboutyourunderstandingofthetitle.Thecaptainoftheship,the

Beagle,wantedsomeonewhowould“profitbytheopportunityofvisitingdistantcountriesyetlittleknown”.Thepersonwhoansweredthecallwasnotthecaptain’sfirstchoice.Itwasayoungmanwhohadleftmedicalschoolwithoutcompletinghisdegree.What’smore,hehadrecentlyreceivedaletterfromhisfatherpredictingthathewouldbe“adisgracetoyourselfandallyourfamily”.Despiteallthis,hisadventuresonthisshipwouldleadtooneofthemostimportantscientificdiscoveriesofalltime.Para

1：Labels

on

a

young

manincaptain’seyesin

common

people’s

eyesin

his

families’

eyesHewasnotthecaptain’sfirstchoice.

Hewasadisgracetohimselfandallhisfamily.Hewasayoungmanwhohadleftmedicalschoolwithoutcompletinghisdegree.Theyoungmaninquestion,CharlesDarwin,wasageologistandnaturalist,fascinatedbyrocks,plantsandanimals.HeleftEnglandontheship,the

Beagle,in1831.Thejourneygavehimthechancetostudyvariouslivingthingsintheirnaturalenvironments.AfterDarwinhadspentsometimeinSouthAmerica,hisroomontheshipwascrowdedwithsamplesoftheplantsandanimalshehadcollected.Ashestudiedthese,heaskedhimselfthequestion:howdiddifferentspeciescometoexist?Para

2：StartajourneywhowhatcollectingsamplesaskinghimselfaquestionCharlesDarwinwasageologistandnaturalist,fascinatedbyrocks,plantsandanimals.Howdiddifferentspeciescometoexist?Para

3：Generate

newideasold

ideasnewideaswhathowtoproveAllspecieshadappearedonEarthatthesametime,andhadnotchangedsince.Animalsevolvedastheyadaptedtotheirchangingenvironments.To

look

for

more

evidence.Atthattime,peoplebelievedthatallspecieshadappearedonEarthatthesametime,andhadnotchangedsince.ButDarwinbegantothinkdifferently.Henoticedthatsomespeciesofanimalswereverysimilartoeachother.Maybeanimalsevolvedastheyadaptedtotheirchangingenvironments?Itwasjustanidea,butenoughtoinspireDarwintolookformoreevidence.Para

4-5Develop

the

ideashowanswerofthatquestionDarwinnoticedfinches’beakshadevolvedaccordingtowhatfoodwasavailableonthatparticularisland.Newspeciesofplantsandanimalsevolvedfromearlierancestors.Whenthe

Beagle

reachedtheGalápagosIslandsin1835,Darwinsawavarietyofnewspecies,butitwasthebirdsthatinterestedhimthemost.Darwinnoticedthattherewasadifferencebetweenthefinchesoneachoftheislands.Itseemedtheirbeakshadevolvedaccordingtowhatfoodwasavailableonthatparticularisland.Darwinsuspectedthatthefincheshadevolvedfromacommonancestor,whichhadarrivedontheislandsalongtimebefore.Overtime,ithadslowlyevolvedintomanynewspecies.Andthatwastheanswertohownewspeciesofplantsandanimalscametoexist:theyevolvedfromearlierancestors.A_________ancestor__________intodifferentspeciescommonevolveItwasacompletelynewidea—atheoryofevolution.Darwinexplainedthistheoryinhisbook,

OntheOriginofSpecies.Itwasnotpublisheduntil1859andimmediatelycausedastorm.Manypeoplerefusedtobelievethatlivingthings,includinghumans,hadevolvedfromlowerformsoflife.Theywereshocked.ButDarwin’sscientificstudiesweresoconvincingthatmoreandmorepeoplestartedtobelievehistheory.Today,

OntheOriginofSpecies

isregardedasoneofthemostimportantworkseverwritten.IthaschangedideasaboutlifeonEarthforever.AnditallbeganwiththejourneyontheBeagle.Para

6-7Proposeatheorywhathowpeople'sreactionInfluenceAtheoryofevolution.Darwinexplainedthistheoryinhisbook,OntheOriginofSpecies.OntheOriginofSpeciesisregardedasoneofthemostimportantworkseverwritten.IthaschangedideasaboutlifeonEarthforever.Manypeoplerefusedtobelieve.Theywereshocked.Later,moreandmorepeoplestartedtobelievehistheory.ComicsusedtomockCharlesDarwin_______tobelievepeoplewere_____________tobelieverefusedshockedstartedWhichoneisthebest?A.Darwin’sinterestinvariouslivingthingsmadehimagreatnaturalist.B.Darwin’sjourneyontheBeagleinspiredhisTheoryofEvolution.C.Darwinwentonajourneytoconfirmhistheorythathumanshadevolvedovertime.Choosethemainideaofthepassageandgiveyourreasons.

Numberthepuzzlepiecesinorder.Organiseinformationfromthepassageandcompletethem.1OnhisjourneyontheBealge:variouslivingthingsintheirnaturalenvironmentsandsamplesoftheplantsandanimalshehadcollected.verysimilartoeachother.2Generateideas•cometoexist?•Maybeanimalsevolvedastheyadaptedtotheirchangingenvironments？3Lookformoreevidencethattherewasadifferencebetweenthefinchesoneachoftheislands.hadevolvedaccordingtowhatfoodwasavailableonthatparticularisland.4Developideashadevolvedfromacommonancestor,whichhadarrivedontheislandsalongtimebeforeslowlyevolvedintomanynewspecies.5Proposeatheory•hadevolvedfromlowerformsoflife.14235Thestructure12--5Thetextisorganizedinorderof____.Pa