Unit5 Revealing natureUnderstanding+ideas（ppt课件） -2023新外研版（2019）《高中英语》选择性必修第一册.pptx

1、新外研社高中英语选择性必修一新外研社高中英语选择性必修一Unit 5 Revealing natureStarting Out&Understanding IdeasThe captain of the ship,theBeagle,wanted someone who would“profit by the opportunity of visiting distant countries yet little known”.The person who answered the call was not the captains first choice.It was a young ma

2、n who had left medical school without completing his degree.Whats more,he had recently received a letter from his father predicting that he would be“a disgrace to yourself and all your family”.Despite all this,his adventures on this ship would lead to one of the most important scientific discoveries

3、 of all time.The young man in question,Charles Darwin,was a geologist and naturalist,fascinated by rocks,plants and animals.He left England on the ship,the Beagle,in 1831.The journey gave him the chance to study various living things in their natural environments.After Darwin had spent some time in

4、South America,his room on the ship was crowded with samples of the plants and animals he had collected.As he studied these,he asked himself the question:how did different species come to exist?At that time,people believed that all species had appeared on Earth at the same time,and had not changed si

5、nce.But Darwin began to think differently.He noticed that some species of animals were very similar to each other.Maybe animals evolved as they adapted to their changing environments?It was just an idea,but enough to inspire Darwin to look for more evidence.When the Beagle reached the Galpagos Islan

6、ds in 1835,Darwin saw a variety of new species,but it was the birds that interested him the most.Darwin noticed that there was a difference between the finches on each of the islands.It seemed their beaks had evolved according to what food was available on that particular island.Darwin suspected tha

7、t the finches had evolved from a common ancestor,which had arrived on the islands a long time before.Over time,it had slowly evolved into many new species.And that was the answer to how new species of plants and animals came to exist:they evolved from earlier ancestors.Today,OntheOriginofSpecies is

8、regarded as one of the most important works ever written.It has changed ideas about life on Earth forever.And it all began with the journey on the Beagle.It was a completely new idea a theory of evolution.Darwin explained this theory in his book,OntheOriginofSpecies.It was not published until 1859 a

9、nd immediately caused a storm.Many people refused to believe that living things,including humans,had evolved from lower forms of life.They were shocked.But Darwins scientific studies were so convincing that more and more people started to believe his theory.1.How can seeds travel?How can this benefi

10、t plants?2.Can you think of another example of seeds travelling?Share it with the class.Watch the video and answer the questions.Activity 1How seeds travel?How can seeds travel?Seeds cane travel great distances by being carried by the _,upon the _,_ or _.windwateranimalspeople2.How can this benefit

11、plants?Seeds have a _(better/worse)chance at life when they are _(closer/further)away from their parent plant.Growing too _(far/close)to the parent plant means seeds might not get enough_,_and nutrients from the _.A species is _(more/less)likely to _ if its members are more _(closely/widely)spread.b

12、etterfurtherclosesunwatersoilmoresurvivewidely12-5The text is organized in _ order.Para_Para_Para 6-7timeBefore the journeyDuring the journeyEnglandIn 1831In 1835Fast readingCan you find out what kind of narrative order(叙述顺序)?Choose the main idea of the passage and give your reasons.1Darwins interes

13、t in various living things made him a great naturalist.2Darwins journey on the Beagle inspired his Theory of Evolution.3Darwin went on a journey to confirm his theory that humans had evolved over time.1.The captain of the ship,theBeagle,wanted someone who would“profit by the opportunity of visiting

14、distant countries yet little known”.The person who answered the call was not the captains first choice.It was a young man who had left medical school without completing his degree.Whats more,he had recently received a letter from his father predicting that he would be“a disgrace to yourself and all

15、your family”.Despite all this,his adventures on this ship would lead to one of the most important scientific discoveries of all time.Para 1：Labels on a young manin captains eyesin common peoples eyesin his families eyesHe was not the captains first choice.He was a disgrace to himself and all his fam

16、ily.He was a young man who had left medical school without completing his degree.2.The young man in question,Charles Darwin,was a geologist and naturalist,fascinated by rocks,plants and animals.He left England on the ship,the Beagle,in 1831.The journey gave him the chance to study various living thi

17、ngs in their natural environments.After Darwin had spent some time in South America,his room on the ship was crowded with samples of the plants and animals he had collected.As he studied these,he asked himself the question:how did different species come to exist?Para 2：Start a journeywhowhatcollecti

18、ng thingsasking himself a questionCharles Darwin was a geologist and naturalist,fascinated by rocks,plants and animals.How did different species come to exist?Samples of the plants and animals Para 3：Generate new ideasold ideasnew ideaswhathow to proveAll species had appeared on Earth at the same ti

19、me,and had not changed since.Animals evolved as they adapted to their changing environments.To look for more evidence.3.At that time,people believed that all species had appeared on Earth at the same time,and had not changed since.But Darwin began to think differently.He noticed that some species of

20、 animals were very similar to each other.Maybe animals evolved as they adapted to their changing environments?It was just an idea,but enough to inspire Darwin to look for more evidence.Para 4-5Develop the ideashowanswer of that questionDarwin noticed finches beaks had evolved according to what food

21、was available on that particular island.New species of plants and animals evolved from earlier ancestors.4.When the Beagle reached the Galpagos Islands in 1835,Darwin saw a variety of new species,but it was the birds that interested him the most.Darwin noticed that there was a difference between the

22、 finches on each of the islands.It seemed their beaks had evolved according to what food was available on that particular island.5.Darwin suspected that the finches had evolved from a common ancestor,which had arrived on the islands a long time before.Over time,it had slowly evolved into many new sp

23、ecies.And that was the answer to how new species of plants and animals came to exist:they evolved from earlier ancestors.Evidence1831the Beaglestarted his journeySouth America,asked himself questions(generated ideas)(developed an idea)answered the question18351859published the book(proposed a theory

24、)Darwin spent _ years on his discoveryBut spent _years publishing his Theory of Evolution in 1859424A _ Journey of _Discovery by_DarwintoughimportantbraveperseverantSummaryPost readingWhat have you learnt about the spirit of scientific exploration?How can this spirit help you in your life and studie

25、s?1.What kind of person was Darwin according to the passage?2.What have you learnt about the spirit of scientific exploration?Darwin was a determined man.He had strong curiosity and interests in science and was good at thinking and making discoveries.Think and Share3.Number the pieces in order.Organ

26、ise information from the passage and complete them.1 On his journeylvarious living things in their natural environments and samples of the plants and animals he had collectedlvery similar to each other2 Generate ideaslcome to existlMaybe animals evolved as they adapted to their changing environments

27、?3 Look for more evidencelthat there was a difference between the finches on each of the islandslhad evolved according to what food was available on that particular island4 Develop ideaslhad evolved from a common ancestor,which had arrived on the islands a long time beforelslowly evolved into many new species5 Propose a theorylhad evolved from lower forms of life