Unit 5 Understanding ideas ppt课件-（2019）新外研版高中英语必修第一册.pptx

1、必修一 Unit 5 Understanding ideas高一年级 英语本板块呈现了一篇反映单元主题的课文，语篇类型为科普类说明文，以科学家的观察和研究为依据介绍了黑脉金斑蝶的迁徙。读前的导入活动列举了有迁徙行为的动物，帮助同学们提前熟悉课文话题，为课文学习做铺垫。读中活动考查同学们对课文话题的理解，引导同学们独立分析课文中所运用的逻辑关系结构。读后活动则是通过文章出处和主旨大意、细节理解和开放性问答等活动，启发同学们深入思考，创造性地探究主题意义。在学习文章的过程中，同学们要深入思考人与动物的关系，最终形成关爱动物、与动物和谐相处的正确的、可持续发展的观念。Step 1: Analysis

2、 of the materialStep 2: Leading-inQuestions:1. Why are they making such a long journey?2. Where are they going?资料This journey of some animals is called migration.Step 2: Leading-in资料What are other animals that migrate?a. monarch butterflyb. Siberian cranec. Atlantic salmond. red pandae. killer whale

3、f. African lion资料资料资料资料资料资料Please read the passage quickly and find out what mystery the scientists have found.Step 3: Knowledge learning资料What mystery have the scientists found?The scientists have solved the mystery of how monarch butterflies manage to travel a long distance and find their way to t

4、heir destination.Step 3: Knowledge learningActivity 2 on Page 50资料1. What is the meaning of the word “migration”?2. What are the purposes of animals migration?3. What does the word “that” in the last sentence refer to?Step 3: Knowledge learningParagraph 1Paragraph 1资料1.What is the meaning of the wor

5、d “migration”?It means the annual movement of some animals at certain times of the year.2.What are the purposes of most animals that migrate?To find food, seek a partner, or in search of warmer weather.3.What does the word “that” in the last sentence refer to?It refers to the migration.Paragraph 112

6、3资料1. The quality of education in this small school is better than _ in some larger schools.2. A study shows the students who are engaged in after-school activities are happier than _ who are not.that / thosethat (the quality of education)those (the students)Paragraph 2Why is it especially amazing f

7、or the butterflies to migrate? Paragraph 2123资料Paragraph 2Why is it especially amazing for the butterflies to migrate? insects with fine black and orange wingsa long and difficult journeyfinding their way along the 4,000-kilometre journey Paragraph 3: Complete the sentences with expressions from the

8、 passage.资料Paragraph 3资料a. The monarch butterfly is able to tell 1_.b. Using these two pieces of information, the monarch butterfly determines 2 _.c. The monarch butterfly measures 3_ with its eyes.d. The monarch butterfly reaches 4 _.Paragraph 3: Complete the sentences with expressions from the pas

9、sage.the time of daythe way to gothe position of the sun the place where it will spend the winterCause-effect is a type of relationship between events where a cause creates an effect. In many cases, an effect can result from many causes and the exact nature of these relationships can be difficult to

10、 determine.Cause-effectParagraph 3: “Cause-effect” flow chartacbdParagraph 4: Complete the sentences with expressions from the passage.资料Paragraph 4资料e. Humans 5_ trees.f.The 6_ where monarchs can be found is destroyed.g. Humans use chemicals that 7_ that monarch caterpillars eat.h. The monarch butt

11、erflys population 8_ in the last few years.Paragraph 4: Complete the sentences with expressions from the passage.cut downnatural environment of many placeskill the plantshas crashed by as much as 90 per centegfhParagraph 4: “Cause-effect” flow chart1. Please paraphrase the sentence “Its population h

12、as crashed by as much as 90 per cent ”2. What other reasons do you think caused the sharp decrease of the butterflys population?Paragraph 4Paragraph 4资料1. Please paraphrase the sentence “Its population has crashed by as much as 90 per cent ”The number of the butterfly has gone down to 10 per cent.2.

13、 What other reasons do you think caused the sharp decrease of the butterflys population?HUMAN.Paragraph 4Paragraph 5If it works,Paragraph 5资料Paragraph 5the research on the monarchs behaviourpeoples greater awareness recording its migrationmaking sure that there is enough foodthe number of the monarc

14、h butterflies will increase.If it works,The more we know about this lovely creature, the greater the chance it will survive and keep its place in the natural world for a long time to come.= When we know more about this lovely creature, the chance of it surviving and keeping its place in the natural

15、world for a long time to come will increase.The structure is used for saying that when you do something or something happens, a particular situation will be the result of it.When you know more about him, you will like him more.= The more I know him, the more I like him.The more , the moreStep 4: Lan

16、guage practicethe research on the monarchs behaviourpeoples greater awareness recording its migrationmaking sure that there is enough foodthe number of the monarch butterflies will increase.If it works,资料资料The monarch butterfly is able to tell the time of day and it measures the position of the sun

17、with its eyes. Using these two pieces of information, the monarch butterfly determines the way to go. Finally, it reaches the places where it will spend the winter.Sample: Flow chart 1资料Because humans cut down trees and use chemicals that kill the plants that monarch caterpillars eat, the natural en

18、vironment of many places where monarchs can be found is destroyed. As a result, its population has crashed by as much as 90 percent in the last few years.Sample: Flow chart 2资料The research on the monarchs behaviour led to peoples greater awareness of protecting it. Therefore, people began to record

19、its migration and made sure that there is enough food along the way. If this works, the number of the monarch butterflies will certainly increase.Sample: Flow chart 3the research on the monarchs behaviourpeoples greater awareness recording its migrationmaking sure that there is enough foodthe number

20、 of the monarch butterflies will increase.If it works,1. In a scientific research paper about the monarch butterflys migration.2. In a popular nature magazine introducing the monarch butterfly.3. In a travel leaflet encouraging people to visit North America.Choose where you are most likely to find t

21、he passage.Think about some practical ways to raise peoples awareness of protecting the monarch butterfly.Step 5: Practical applicationwaysmedia, record a video clip, its beautyvolunteer, introduce, natural museum farm and garden, grow, food and shelter The “cause-effect” chart is developed like this.Step 5: Practical applicationway 1way 2awarenessactionresultFor your homework: Complete your version of the “cause-effect” chart and write a paragraph based on it.Step 6: Homework way 1way 2awarenessactionresultThanks for your attention.