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

1、名师课堂Unit 5 Revealing nature外研版 高中英语网络教学资源Starting out & Understanding ideas新标准新标准英语英语高中选择性必修第一册高中选择性必修第一册Contenthomework reading for details starting out theme3Click here to add the title text contentActivity 1 Look at the page from a science magazineand answer the questions.1. What do you know abou

2、t these animals? What makes them special? Komodo dragon: It evolved in Australia and spread westward Duck-billed platypus: The oldest discovered fossil of it dates back to about 100,000 years ago Nautilus: It often considered “living fossils” They are all species that exit thousands of years on eart

3、h; They are old and rare (unusual).2. What other similar animals do you know about? Share your knowledge with the class.4Click here to add the title text contentActivity 21. How can seeds travel? How can this benefit plants? Seeds usually are carried by the wind, water, and animals. Plants can have

4、a better chance at life.2. Can you think of another example of seeds travelling? Share it with the class.Watch the video and answer the questions. Dandelion seeds have little parachutes to catch the wind and go further; Humans can spread seeds if seeds get stuck to their clothing or shoes.5Click her

5、e to add the title text contentape 祖先祖先lower forms of life higher forms of life evolve-evolutionAn evolutionary treeActivity 1 Look at the evolutionary tree and answer the questions.Activity 1 Look at the evolutionary tree and answer the questions.1 What species do you recognise in the picture? Para

6、mecium, earthworm, snail, crab, fish, tortoise, bird, horse, human, frog.; alga, moss, fern, plant.2 What factors can cause the process of evolution? The ever-changing environment of nature; environmental changes; population immigration; genetic mutation; cultural preferences.7Click here to add the

7、title text contentActivity 2 Read the passage and talk about yourunderstanding of the title.Activity 2 Most commonly, people believe that 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 chan

8、ges and develops. The title may indicate that Darwins research work leading to his discovery of evolution and the origin of species took quite a long time and great efforts, determination and courage to achieve.Read the passage and talk about yourunderstanding of the title.9Click here to add the tit

9、le text contentActivity 3 Choose the main idea of the passage and give your reasons.Which one is the best?The title of the passage is “a journey of discovery”. So the passage is mainly about how Darwins Theory of Evolution generated and developed on his journey on the Beagle.12-5The text is organize

10、d in order of_ .Para_Para_Para 6-7timeBefore the journeyDuring the journeyEnglandIn 1831In 1835Read for detailed information 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 familyHe w

11、as a young man who had left medical school without completing his degree. Writing purpose: Set the suspense to attract readers interestsRead for detailed information Para 2：Start a journeywhowhatcollecting samplesasking himself a questionCharles Darwin was a geologist and naturalist, fascinated by r

12、ocks, plants and animals. How did different species come to exist?Read for detailed information Para 3：Generate new ideasold ideasnew ideaswhathow to proveAll species had appeared on Earth at the same time, and had not changed since Animals evolved as they adapted to their changing environments To l

13、ook for more evidenceRead for detailed informationPara 4-5Develop the ideashowanswer of that questionDarwin noticed finches beaks had evolved according to what food was available on that particular island.New species of plants and animals evolved from earlier ancestors.Read for detailed informationP

14、ara 6-7Propose a theory whathowpeoples reactionInfluenceA theory of evolution. Darwin explained this theory in his book, On the Origin of Species. On the Origin of Species is regarded as one of the most important works ever written. It has changed ideas about life on Earth forever. Many people refus

15、ed to believe. They were shocked. Later, more and more people started to believe his theory. 16Click here to add the title text content Activity 4 Number the puzzle pieces in order. Organise information from the passage and complete them.1 On his journey on the Bealge: various living things in their

16、 natural environments and samples of the plants and animals he had collected. very similar to each other.2 Generate ideas come to exist? Maybe animals evolved as they adapted to their changing environments？3 Look for more evidence that there was a difference between the finches on each of the island

17、s. had evolved according to what food was available on that particular island.4 Develop ideas had evolved from a common ancestor, which had arrived on the islands a long time beforeslowly evolved into many new species.5 Propose a theory had evolved from lower forms of life.14235NoImageasked himself

18、a question(generated an idea)answered the question(developed an idea)published the book (proposed a theory) started his journeyRetell the passage according to the clues18Click here to add the title text content 1.At that time, many people believed that all species had appeared on Earth at the same t

19、ime and had not changed since, but Darwins theory proposed that living things, including humans, had evolved from lower forms of life, which, as a result, shocked many people.2.Darwin was a determined man. He had strong curiosity and interests in science and was good at thinking and making discoveri

20、es.Think & Share I can succeed in science, the most important thing is the love of science and insisting onlong- term exploration. -Charles Robert DarwinDarwins scientific spirit20Click here to add the title text content1. Write a short passage to tell the story of Darwins journey of discovery using your own words (about 100 words)2. Do further research on why Darwin did not publish his Theory of Evolution until 1859-about twenty years after his discovery.HomeworkNo practice, no gain in ones wit. Thankyouforwatching