Unit 5 Understanding ideas A Journey of Discovery ppt课件（2019）新外研版高中英语选择性必修第一册.pptx

1、Learning aimsLearning aims1.学生能够理清文章结构，理解文章主旨大意。2.学生能够根据时间线索及细节内容对 Darwin 的发现之旅进行简单的复述。3.学生能够在语篇中找出体现 Darwin 科学探索精神的词句并能加以分析理解。4.通过阅读，体会科学探索的艰辛，学习达尔文不畏艰难、大胆质疑、勇于探究的科学精神。CharlesCharles DarwinDarwin1809-18821809-1882English geologistEnglish geologist andand naturalistnaturalistfamous bookfamous book O

2、n the Origin of Speciesthethe theory oftheory of evolutionevolutionnatural selectinatural selectiThe plants and animalsThe plants and animalsshould adjustshould adjust themselvesthemselvestoto the environmentthe environment totosurvive and survive and reproduce.reproduce.A A Journey of DiscoveryJour

3、ney of DiscoveryHow did the authorHow did the author organise the passage?organise the passage?BeforeBefore the journeythe journeyPara 1Para 1During the journeyDuring the journeyPara 2-5Para 2-5Para 6-7Para 6-7AfterAfter the journeythe journeyRead forRead for detailsdetailsWhat did the captainWhat d

4、id the captaindodo ? ?offeroffer anan opportunityopportunitytriestriesBeforeBefore the journey the journeyPara 1Para 1not the firstnot the first cecea.Hea.He left his schoolleft his school without completing his without completing his degreedegreeBackgroundBackgroundb.His fatherb.His father predicte

5、dpredictedyourself and allyourself and all youryour fafabebe “a“a disgrace to disgrace tospirit?spirit?During theDuring the journeyjourneyPara 2-5Para 2-5AfterAfter thethe journeyjourneyPara 6-7Para 6-7Read forRead for details(Para 2-3)details(Para 2-3)1. 1. InIn 1831, on his 1831, on his journey,jo

6、urney, what didwhat did Charles Darwin find?Charles Darwin find?D DH Hspirit?spirit? nvironments.nvironments.His His roomroom waswas crowdedcrowded with samples with samplesandand animals heanimals he had collected.had collected.2. 2. What the questions What the questions diddid Darwin Darwinask?ask

7、?-How-How diddid differentdifferent species come species come to exist to exist ？-Maybe-Maybe animals evolvedanimals evolved as they adaptedas they adapted to theirto their changing environments?changing environments?Read forRead for details(Paradetails(Para 4-5)4-5)1. 1. In 1835,In 1835, What theWh

8、at the evidence didevidence did Darwin lookDarwin look for?for?He noticed.He noticed.naturalnaturalselectionselectionIt seemedIt seemed theirtheir beaks had evolvedbeaks had evolvedonon particularparticular island.island.t foodt food was availablewas available2.What 2.What diddid Darwin suspect ? Da

9、rwin suspect ?The finches had evolved The finches had evolved fromfrom a common ancestora common ancestor and it had evolvedand it had evolvedinto manyinto many new species.new species.Read forRead for details(Para 6-7)details(Para 6-7)proposepropose a theory a theory ofof evolutievolutiWhat?What?-l

10、iving-living things had evolved things had evolved fromfrom lowerlower forms of life.forms of life.BeforeBefore: all species had appeared: all species had appeared on Earthon Earth at theat thesame time.same time.- -tor.tor.NowNow: living: living thingsthings had evolved had evolved fromfrom lowerlo

11、wer formsformsof life.of life.- -refuserefuse to believe and shocketo believe and shockeretellretell passagepassageBackgroundBackgroundFirst,.First,.Then,.Then,.Later,.Later,.AfterAfterProcessProcessthat,.that,.Finally,.Finally,.BeforeBefore the journeythe journeyBackgroundBackground1 1During the jo

12、urneyDuring the journeyara 2-5ara 2-5ProcessProcessAfterAfter the journeythe journeyPara 6-7Para 6-7SignificanceSignificanceThink andThink and shareshare1. 1. Why Darwin did notWhy Darwin did not publish hispublish his Theory of EvolutionTheory of Evolutionuntil 1859, about twenty years afteruntil 1

13、859, about twenty years after his discovery?his discovery?2. 2. What have youWhat have you learnt learnt fromfrom Darwins journeyDarwins journeyofof discovery?discovery?HomeworkFind outFind out more informationmore informationPolish yourPolish your own passageown passageaccordingaccording to whatto what we havewe havelearnt.learnt.aboutabout Darwin andDarwin and his theoryhis theoryandand share it with yourshare it with yourclassmates.classmates.