Unit 5 Revealing nature Starting out & Understanding ideas （ppt课件）-2024新外研版（2019）《高中英语》选择性必修第一册.pptx

1、外研选择性必修第一册 Unit 5Period 1Starting out&Understanding ideas(I)教学目 Lead-in1 What species do you recognise in the picture?2 What factors can cause the process of evolution?Paramecium,earthworm,snail,crab,fish,tortoise,bird,horse,human,frog.;alga,moss,fern,plant.The ever-changing environment of nature;en

2、vironmental changes;population immigration;genetic mutation;cultural preferences.学习目标学习目标12To develop a sense of evolution by watching the videoTo get the main idea of the text and specific information about the journey of discovery目标一：目标一：To develop a sense of evolution by watching the videoActivit

3、y 1:Look at the page from a science magazine and answer the questions.1.What do you know about these animals?What makes them special?2.What other similar animals do you know about?Share your knowledge with the class.They are all species that exist thousands of years on earth;They are old and rare(un

4、usual).Background informationThe Komodo dragon The Komodo dragon is the largest lizard in the world.It can grow to three metres in length and can weigh about 135 kilograms.Despite its size and weight,it can run for short distances at up to 20 kilometres per hour.The Duck-billed platypus The duck-bil

5、led platypus is a small egg-laying mammal(up to 60 cm in length)found only in Eastern Australia including Tasmania.As its name suggests,it has a mouth that looks like a ducks bill,while its thick fur and flat tail are similar to those of a beaver.Nautilus As one of the oldest sea animals in the worl

6、d,the nautilus has hardly changed in about 500 million years,and that is why it is often given the name“living fossil”.Activity 2:Watch the video and answer the questions.1 How can seeds travel?How can this benefit plants?2 Can you think of another example of seeds travelling?Share it with the class

7、.Seeds usually are carried by the wind,water,and animals.Plants can have a better chance at life.目标二目标二:To get the main idea of the text and specific information about the journey of discovery Activity 1:Read the passage and talk about your understanding of the title.Most commonly,people believe tha

8、t a journey means a trip from one place to another,especially over a long distance and literarily a journey refers to the process by which something gradually changes and develops.The title may indicate that Darwins research work leading to his discovery of evolution and the origin of species took q

9、uite a long time and great efforts,determination and courage to achieve.Activity 2:Read the passage again and find out the genre of the passage.He left England on the ship,the Beagle,in 1831.When the Beagle reached the Galpagos Island in 1835,Darwin saw a variety of new species.It is a narrative in

10、time order.Activity 3:Choose the main idea of the passage and give your reasons.1.Darwins interest in various living things made him a great naturalist.2.Darwins journey on the Beagle inspired his Theory of Evolution.3.Darwin went on a journey to confirm his theory that humans had evolved over time.

11、Activity 4:Read to find out the detailed information about the journey:the time and what he did or thought.TimeWhat he did/thoughtHe left England on the ship,the Beagle.In 1831He left England on the ship,the Beagle.He studied the samples of plants and animals and asked himself the question:how did d

12、ifferent species come to exist?He noticed that some species of animals were very similar to each other.TimeWhat he did/thought In 1835 when he reached the Galpagos Islands.In 1859 His book,On the Origin of Species,was published,which immediately caused a storm.He noticed that there was a difference

13、between the fincheson each of the islands.He suspected that the finches had evolved from a common ancestor.Over time,it had slowly evolved into many new species.Activity 5:Number the puzzle pieces in order.Organise information from the passage and complete them.14235On his journey Darwin studied _ H

14、e noticed that some species of animals were _General ideas How did different species _ _Look for more evidenceOn the Galapagos Island:He noticed _ It seemed the beaks _various living things in their natural environments and samples of the plants and animals he had collectedvery similar to each other

15、come to existMaybe animals evolved as they adapted to their changing environmentsthat there was a difference between the finches on each of the islandshad evolved according to what food was available on that particular island.Develop ideas Darwin suspected that the finches _and it had _Propose a the

16、ory The Theory of Evolution:living things,including humans,_ had evolved from a common ancestor,which had arrived on the islands a long time beforeslowly evolved into many new specieshad evolved from lower forms of lifeNow discuss why Darwin did not publish his Theory of Evolution until 1859,about t

17、wenty years after his discovery.Do further research if necessary.Activity 6:Think&Share 1 Why were many people“shocked”by Darwins theory?At that time,people believed that all species had appeared on Earth at the same time and had not changed since,but Darwins theory proposed that living things,inclu

18、ding humans,had evolved from lower forms of life,which,as a result,shocked many people.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.These good qualities helped Dar

19、win make such a long journey from 1831 to 1859 to pursue his scientific exploration and finally published the great book,On the Origin of Species.3 How do you think the human species will evolve in the future?4 What have you learnt about the spirit of scientific exploration?How can this spirit help

20、you in your life and studies?外研选择性必修第一册 Unit 5Period 1Starting out&Understanding ideas(II)Activity 7:Find the important words,phrases,and language points you want to share with your partner.Then discuss in groups and share their usage with the class.1 distant adj.遥远的，久远的；冷淡的，疏远的；远房的，远亲的【教材原文】The cap

21、tain of the ship,the Beagle,wanted someone who would“profit by the opportunity of visiting distant countries yet little known.”Beagle号的船长想要招募一个能通过去访问遥远的少有人知的国家的机会获利的人。【知识归纳】（1）distance n.C，U距离；U（时间的）久远，（空间的）遥远；U，C疏远in the distance 在远处from a distance 从远处（at/from a distance of.在/从 远的地方（of后跟具体的距离）（2）di

22、stantly adv.遥远地；模糊地【即学即用】单句语法填空(1)We could see nothing in the thick fog _ a distance of five metres,so we got lost.(2)My company is five miles distant _my home.at/fromfrom2 predict vt.预言；预告；预报【教材原文】Whats more,he had recently received a letter from his father predicting that.而且，他最近收到了一封来自他父亲的信，预言他.【知

23、识归纳】（1）predict+that/wh-A 预言It is predicted that.据预测/据预报（It作形式主语，that引导的从句为真正的主语）（2）prediction n.预言，预测predictable adj.可预见的，可预料的unpredictable adj.不可预料的3 crowded adj.挤满的；拥挤的【教材原文】.,his room on the ship was crowded with samples of the plants and animals he had collected.，他在船上的房间挤满了他收集的动植物样本。【知识归纳】（1）be

24、crowded with.挤满（2）crowd in（on）sb.涌上（心头），涌入（脑海）crowd into ones mind 上某人的心头crowd into.大批涌入（2）a crowd of/crowds of.大群很多4 inspire vt.（1）鼓励，激励，后接“人”作宾语；（2）启发思考，赋予灵感【教材原文】.,but enough to inspire Darwin to look for more evidence.，但是足以鼓舞达尔文去寻找更多证据。【知识归纳】（1）inspire sb.to do sth.激励某人去做某事（2）inspiring adj.鼓舞人心的

25、，启发灵感的 inspired adj.受到鼓舞的（3）inspiration n.灵感；启发灵感的人5 suspect vt.怀疑，猜想 n.嫌疑犯，可疑对象【教材原文】Darwin suspected that the finches had evolved from a common ancestor.达尔文怀疑这些雀科鸣禽都从共同的祖先进化而来。【知识归纳】（1）suspect that.怀疑/认为（尤指坏事可能属实或发生）suspect sb.of（doing）sth.怀疑某人（做了）某事（2）suspect sth./sb.to be.猜想某物/某人.6 convincing ad

26、j.令人信服的；有说服力的【教材原文】But Darwins scientific studies were so convincing that more and more people started to believe his theory.（1）convince vt.使确信；使信服；说服convince sb.of sth./that.使某人相信某事（2）convince sb.to do sth.说服某人做某事（3）convinced adj.坚信不疑的，确信的be convinced of/that.深信不疑；确信；坚信7 of all time意为“有史以来，历史上”，常与形

27、容词最高级连用。【教材原文】.would lead to one of the most important scientific discoveries of all time.能引出有史以来最重要的科学发现。【归纳拓展】（1）all the time 一直始终（2）in time 及时（3）on time准时（4）at times 有时（5）at one time 曾经（6）at a time每次（7）in no time立刻，马上（8）at no time决不（位于句首时句子用部分倒装）8 Darwin saw a variety of new species，but it was th

28、e 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a variety of是固定搭配，意为“各种各样的”，various是variety的形容词形式，表达different kinds of这个意思时，a variety of和various可以互换。例如：Our school provides a variety of/various after-class activit

29、ies for the students.（我们学校为学生提供多种多样的课外活动。）but后面的句子，该句使用了英语中的常见句式-强调句，基本结构为：It is/was.that/who.例如：It was on the ship，the Beagle，that Darwin studied a variety of species.（Darwin是在名为 the Beagle的船上对多种物种进行了研究。）学习总结学习总结1 Can you retell Darwins trip on Beagle?2 What influence does the Theory of Evolution have on science?