Unit 5 Understanding ideas （ppt课件）-2022新外研版（2019）《高中英语》选择性必修第一册.pptx

1、SB1U5 Revealing natureA Journey of Discovery(Starting out&Understanding ideas)Starting outActivity 1Look at the page from a science magazine and answer the questions.1.1.What do you know about these animals?What What do you know about these animals?What makes them special?makes them special?2.2.What

2、 other similar animals do you know What other similar animals do you know about?Share your knowledge with the class.about?Share your knowledge with the class.Komodo dragon:It evolved in Australia and spread westward Duck-billed platypus:The oldest discovered fossil of it dates back to about 100,000

3、years ago Nautilus:It often considered“living fossils”They are all species that exit thousands of years on earth;They are old and rare(unusual).Starting outActivity 2Watch the video and answer the questions.1.1.How can seeds travel?How can this benefit How can seeds travel?How can this benefit plant

4、s?plants?2.2.Can you think of another example of seeds Can you think of another example of seeds travelling?Share it with the class.travelling?Share it with the class.Seeds usually are carried by the wind,water,and animals.Plants can have a better chance at life.Dandelion seeds have little parachute

5、s to catch the wind and go further.Humans can spread seeds if seeds get stuck to their clothing or shoes.Understanding ideasA Journey of DiscoveryLead inAn evolutionary An evolutionary treetreelower forms lower forms of lifeof life higher forms higher forms of lifeof life evolve-evolutionevolve-evol

6、ution1.What species do you recognise in the picture?2.What factors can cause the process of evolution?Paramecium,earthworm,Paramecium,earthworm,snail,crab,fish,tortoise,snail,crab,fish,tortoise,bird,horse,human,frog.;bird,horse,human,frog.;alga,moss,fern,plant.alga,moss,fern,plant.The ever-changing

7、The ever-changing environment of nature;environment of nature;environmental changes;environmental changes;population immigration;population immigration;genetic mutation;genetic mutation;cultural preferences.cultural preferences.Who Who made this discovery?made this discovery?What What is the discove

8、ry?is the discovery?How did he make the discovery?Charles Robert Charles Robert DarwinDarwinThe theory of evolutionThe Origin of SpeciesPre-readingChoose the main idea of the passage and give your reasons.1.1.Darwins interest in various living things made Darwins interest in various living things ma

9、de him a great naturalist.him a great naturalist.2.2.Darwins journey on the Darwins journey on the BeagleBeagle inspired his inspired his Theory of Evolution.Theory of Evolution.3.3.Darwin went on a journey to confirm his theory Darwin went on a journey to confirm his theory that humans had evolved

10、over time.that humans had evolved over time.Pre-readingWhile-reading Read for structureHowHow he made the he made the discovery.discovery.Para.1 Para.1 Para.2 Para.2 Para.3 Para.3 Para.4 Para.4 Para.5 Para.5 Para.6 Para.6 Para.7 Para.7 Introduction On his journey Generate ideas Look for more evidenc

11、eDevelop ideas Propose a theoryConclusion ParaPara 1 1：LabelsLabels onon a a youngyoung manman(intro-(intro-duction)duction)in captains in captains eyeseyesinin commoncommon peoplespeoples eyeseyesinin hishis fatherfathers s eyeseyesWriting purpose:Set the suspense to attract readers interestsand fo

12、rm a strong contrast.He was not the captains He was not the captains first choice.first choice.He was a disgrace to He was a disgrace to himself and all his familyhimself and all his familyHe was a young man who had He was a young man who had left medical school without left medical school without c

13、ompleting his pleting his degree.While-reading Read for details1.What is the function of para1.What is the function of para 1?1?A.A.To praise Charles DarwinTo praise Charles DarwinB.B.To arouse readers interestsTo arouse readers interestsC.C.To introduce Charles Darwins achievementsTo introduce Char

14、les Darwins achievementsD.D.To inform readers of Charles Darwins lifeTo inform readers of Charles Darwins life2.2.Which of the following statements about Charles Which of the following statements about Charles Darwin is Darwin is TrueTrue?A.A.Darwin wanted to benefit from visiting little-known Darwi

15、n wanted to benefit from visiting little-known countriescountriesB.B.Darwin quitted medical school due to his lack of moneyDarwin quitted medical school due to his lack of moneyC.C.Darwins father was satisfied with DarwinDarwins father was satisfied with DarwinD.D.Darwins made a significant scientif

16、ic discovery thanks Darwins made a significant scientific discovery thanks to his adventures on the ship to his adventures on the ship BeagleBeagle ParaPara 2 2：On his On his journeyjourneywhowhowhatwhatcollecting collecting samplessamplesasking himself asking himself a questiona questionCharles Dar

17、win was a Charles Darwin was a geologist and naturalist,geologist and naturalist,fascinated by rocks,fascinated by rocks,plants and animals.plants and animals.How did How did different species different species come to exist?come to exist?While-reading ParaPara 3 3：Generateenerate ideasideasoldold i

18、deasideasnew new ideasideaswhatwhathowhow to to proveproveAll species had appeared on All species had appeared on Earth at the same time,and Earth at the same time,and had not changed since had not changed since Animals evolved as they Animals evolved as they adapted to their adapted to their changi

19、ng environments changing environments ToTo looklook forfor moremore evidenceevidenceWhile-readingParaPara 4-54-5Look for Look for evidenceevidence&DevelopDevelop thethe ideasideashowhowanswer answer of that of that questionquestionDarwin noticed finches beaks Darwin noticed finches beaks had evolved

20、 according to what had evolved according to what food was available on that food was available on that particular island.particular island.New species of plants New species of plants and animals evolved and animals evolved from earlier ancestors.from earlier ancestors.While-readingParaPara 6-76-7Pro

21、pose Propose a theory a theory&ConcludeConcludewhatwhathowhowpeoplepeoples s reactionreactioninfluenceinfluenceA theory of evolutionA theory of evolutionDarwin explained this theory in his Darwin explained this theory in his book,book,On the Origin of SpeciesOn the Origin of Species.On the Origin of

22、 Species is On the Origin of Species is regarded as one of the most regarded as one of the most important works ever written.important works ever written.It has changed ideas about It has changed ideas about life on Earth forever.life on Earth forever.Many people refused to Many people refused to be

23、lieve.They were shocked.believe.They were shocked.Later,more and more people Later,more and more people started to believe his theory.started to believe his theory.While-readingWhile-readingRead for consolidation1 12 23 34 45 5l samples of the plants and animalsl very similar to each other.l come to

24、 exist?l Maybe animals evolved as they adapted to their changing environmentsl there was a difference between the finches on each of the islands.l had evolved according to what food was available on that particular islandl had evolved from a common ancestor.l arrived on the islands a long time befor

25、el had evolved from lower forms of lifePost-readingSummarize&Retelling1 12-52-5The text is organized in order of _.The text is organized in order of _.Para._Para._Para._Para._Para.6-7Para.6-7timetimeBefore Before the journey the journeyDuring During the journeythe journeyPost-readingSummarize&Retell

26、ingAfterAfterthe journeythe journeyasked himself a question asked himself a question(generated an idea)(generated an idea)answered the question answered the question(developed an idea)(developed an idea)published the book published the book(proposed a theory)(proposed a theory)startedstarted hishis

27、journeyjourneyIn 1831In 1831In 1835In 1835In 1859In 1859Post-readingRetellingPost-readingWatch and Reflect1.1.What kind of person was Darwin according to What kind of person was Darwin according to the passage?the passage?2.2.What have you learnt about the spirit of What have you learnt about the sp

28、irit of scientific exploration?scientific exploration?I can succeed in science,the most important thing is I can succeed in science,the most important thing is the lovethe love of science and insisting on of science and insisting on long-term explorationlong-term exploration.-Charles Robert Darwin-Charles Robert DarwinDarwins scientific spiritThank you!