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

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    Unit 5 Revealing nature Starting out & 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、Unit 5 Revealing natureUnit 5 Revealing natureSection A Understanding ideasSection A Understanding ideasPre-class1.be first_被首次邂逅2._追溯到3._访问遥远的国度4._响应号召5.first choice_6.whats more_encountereddate back tovisit distant countriesanswer the call 首选首选而且;更重要的是;另外而且;更重要的是;另外7._对某人来说是耻辱8.of all time_9.in qu

    2、estion_10.be crowded _ samples堆满样本11._开始存在12.appear on Earth_be a disgrace to sb.有史以来有史以来正被谈论的,讨论中的正被谈论的,讨论中的with come to exist 出现在地球上出现在地球上13.adapt_适应14._激励某人做某事15.suspect that._suspect sb._(doing)sth.怀疑某人(做)某事16.evolve from a common_ 由共同的祖先进化而来17.a long time before_18.over time_toinspire sb.to do

    3、sth.怀疑怀疑of ancestor 很久以前很久以前 随着时间的推移随着时间的推移Charles Darwin and his Theory of Evolution Charles Darwin(18091882)was an English geologist and naturalist.In his famous book On the Origin of Species,Darwin proposed the theory that organisms(individual life forms)evolve extremely slowly.He stated that the

    4、 organisms that were better suited to their environments would survive and pass on their favorable characteristics to the next generation,while the less suitable organisms would gradually die out.He called this process natural selection.1 What species do you recognise in the picture?Paramecium,earth

    5、worm,snail,crab,fish,tortoise,bird,horse,human,frog,algae,moss,fern.2 What factors can cause the process of evolution?Students own answers.While-class文章句子分析1 Whats more,he had recently received a letter from his father predicting that he would be a disgrace to yourself and all your family.Paraphrase

    6、:Besides,he had received a letter from his father,in which his father said that he would not only make himself but also the whole family feel ashamed.注意a disgrace to.这个固定搭配,该搭配意为to have a very bad effect on the opinion that people have of your family or the group that you belong to。.Darwin saw a var

    7、iety of new species,but it was the birds that interested him the most.Paraphrase:Among all different kinds of species he saw,Darwin was most interested in the birds.本句中的本句中的a variety of 是固定搭配,是固定搭配,various是是variety的形容词形式,表达的形容词形式,表达 different kinds of 这个意思时,这个意思时,a variety of 和和 various 可以互换。可以互换。例如

    8、例如:Our school provides a variety of/various after-class activities for the students.(我们学校为学生提供多种多样的课外活我们学校为学生提供多种多样的课外活动。动。)该句使用了英语中的常见句式该句使用了英语中的常见句式强调强调句句,基本结构为:基本结构为:It is/was.that/who.例如:例如:It was on the ship,the Beagle,that Darwin studied a variety of species.(Darwin是在名为是在名为the Beagle的船上对的船上对多种

    9、物种进行了研究。)多种物种进行了研究。)3 It was not published until 1859 and immediately caused a storm.Paraphrase:Only in 1859 did the book come out and at once it caused a great sensation.caused a storm,本意是,本意是“引起风暴引起风暴”,这里取,这里取其引申义,即其引申义,即“引起轰动引起轰动”。例如:The newspaper is in its declining years.They dont care;they qui

    10、te like to cause a storm.(这家报纸正在走下坡路,他们豁出去了,一心只想制造轰动。)此处convincing意为making you believe that something is true or right。例如:There is convincing evidence that smoking causes lung cancer.(有令人信服的证据表明吸烟导致肺癌。)4 But Darwins scientific studies were so convincing that more and more people started to believe h

    11、is theory.Paraphrase:His scientific studies provided strong evidence so that a growing number of people began to accept his theory.1 On his journey Darwin studied various living things in their natural environments and samples of the plants and animals he had collected.He noticed that some species o

    12、f animals were very similar to each other.2 Generate ideasDarwin asked the questions:How did different species come to exist?Maybe animals evolved as they adapted to their changing environments?3 Look for more evidenceOn the Galpagos Islands:He noticed that there was a difference between the finches

    13、 on each of the islands.It seemed the beaks had evolved according to what food was available on that particular island.4 Develop ideasDarwin suspected that the finches had evolved from a common ancestor,which had arrived on the islands a long time before and it had slowly evolved into many new speci

    14、es.5 Propose a theoryThe Theory of Evolution:living things,including humans,had evolved from lower forms of life.After-class1 Why were many people shocked by Darwins theory?2 What kind of person was Darwin according to the passage?Darwin was a determined man.He had strong curiosity and interest in science and was good at thinking and making discoveries.谢谢观看


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