1、Period 2 Understanding ideas 学习目标 1.To get the main idea of the text by skimming the key words,and accurately judge the source of the article according to the content of the text. 2.To find out the main details quickly in the text through intensive reading,and clear the causal logic of the text. 3.T
2、o learn the background,purpose and way of the monarchs migration,understand the influence of human behavior on their survival,and deepen the cognition of the text and the theme of the unit. 自主预习 Match the words with their English explanations. 1.annual a.the place where sb/sth is 2.migrate b.to move
3、 from one part of the world to another according to the season 3.seek c.to find the size,quantity,etc.of sth 4.determine d.to try to find or obtain sth 5.manage e.happening or done once every year 6.measure f.to fix sth or decide 7.position g.to be successful in doing sth 8.eventually h.at the end o
4、f a period of time or a series of events 9.solution i.to continue to live or exist especially after coming close to dying 10.mystery j.to fall violently 11.amazing k.to damage sth so badly that it cannot be used 12.crash l.the answer to a problem 13.destroy m.extremely surprising 14.creature n.sth s
5、trange or not known that has not yet been explained or understood 15.survive o.any large or small living thing that can move independently 课堂探究 一、Before reading Task:Watch a video and share feelings. 二、While reading Task 1 Read the passage quickly and answer the question. Where are you most likely t
6、o find the passage? a.In a scientific research paper about the monarch butterflys migration. b.In a popular nature magazine introducing the monarch butterfly. c.In a travel leaflet encouraging people to visit North America. Task 2 Match the main idea of each paragraph and then analyse the structure
7、of this passage. Paragraph 1 a.The monarchs migration. Paragraph 2 b.The definition of migration. Paragraph 3 c.The effects of the research. Paragraph 4 d.How does the monarch finish its migration? Paragraph 5 e.Whys the number of the monarch falling? Task 3 Read the passage paragraph by paragraph t
8、o answer the following questions. Why do many animals migrate? What mystery have the scientists found out? How does the monarch determine the way to go? What has happened to the monarch in the past few years and how did it happen? Whats the significance of the research on the monarch? Task 4 Read th
9、e passage again and finish Activity 4 on Page 52. Task 5 Language focus 1.The more we know about this lovely creature,the greater the chance it will survive. 我们对这种可爱的生物了解的越多,它生存的机会就越大。 【知识链接】 本句使用了“the+比较级,the+比较级”句型,表示“越就越”。 【实战演练】翻译句子 你越细心,犯的错误就越少。 你越努力,取得的进步就越大。 2.These two pieces of information-
10、the time of day and the point where the sun is in the sky allow the butterfly to determine the way to go. 一天中的时间以及太阳在空中所处的位置,这两条信息可以帮助黑脉金斑蝶决定它需要走 哪条路。 【知识链接】 (1)句子中的 where the sun is in the sky为关系副词 where 引导的定语从句,修饰先行词 point,where 在从句中用作地点状语。 (2)determine v.决定 变成名词:determination 意思是决心; 变成形容词:determi
11、ned 意思是坚决的 【实战演练】单句语法填空 This is the school I spent my high school life. This is the school is called Panyang Middle School. This is the school I will introduce. 他决定学日语。 我决心要获得成功。 a leader with courage and determination 三、After reading Task 1 Design a mind map for the passage. Task 2 Challenge yourse
12、lf! Write a summary with the mind map. Requirements: 1.Use your own wording. 2.Express the main ideas. 3.Keep the summary short(about 1/3 or 1/4 as long as the original one). Task 3 Group discussion What else can people do to help protect the monarch butterfly? 核心素养专练 一、Can you describe how monarch
13、butterflies migrate every autumn? 二、Can you describe the research on the monarch butterfly? 三、Have you got a right attitude to the behavior of wild animals now? 四、Read the article Bird migration and fill in the blanks. Bird migration The main reason for migration or movement is food;for example,some
14、 birds may choose not to migrate if they are fed through the cold months.Changes in the day length are signals for migration and relate to the physical changes in the birds.Birds will also display restlessness and increase their fat deposition(沉积).During shorter days in the fall,birds will return to
15、 warmer areas where they find adequate food supply. Many smaller insect-eating birds migrate large distances usually at night.They may feed for a few days before continuing their course of travel.An advantage for night migrating is that it minimizes the threat of predators(食肉动物),allowing the birds t
16、o feed during the day and avoid overheating. The migration for these birds is based on a number of different senses.Many birds use the sun as a compass.The ability to detect magnetic field(磁场),use of visual landmarks,as well as their sense of smell are used to help travel during migration.Bird migra
17、tion is a strong genetic factor in terms of timing and route,which can be influenced by temperature.Migratory birds may use two tools to find their destinations;innate capability(genetically programmed)and experience.A first-timer migrant(候 鸟)flies according to the Earths magnetic field,but does not
18、 know how far it will take until it grows accustomed to the journey and is able to use its other capabilities.With experience it learns various landmarks often called “mapping”. Migration is mainly seen in the Northern Hemisphere and less obvious in the Southern Hemisphere.This is due to the lack of
19、 significant weather changes and the continual supply of food for the birds.A common pattern in migration involves flying north in the spring to bread(繁殖)during the summer and traveling to the south in the fall into warmer regions.No two species follow the exact route from beginning to end.Migration
20、s narrow into one or more preferred routes or often called “flyways”.Flyways mainly follow coasts,sometimes rivers,or mountain ranges.There are four major North American flyways;the Atlantic,the Mississippi,the Central and the Pacific Flyways.The flyways are not defined in their boundaries and at ti
21、mes may be combined into one. In fact,long distance migrants move away from each other as young birds and form attachments to potential breeding and wintering sites.Once the site attachment is made,birds show high site- faith,visiting the same sites year after year.You will want to ensure your nesti
22、ng boxes are cleaned out and available when these birds return to keep the cycle going for these migrating species. Bird migration Passage outline Supporting details Why do birds migrate? Besides 1. ,migration has something to do with birds physical changes and day length changes. What are the advan
23、tages of night migrating? Night migrating helps minimize the 2. of being threatened by predators. Night migrating allows birds to feed enough during the day without overheating. 3. do birds migrate? The sun,magnetic field,visual landmarks and the sense of smell are all 4. for birds to migrate. Envir
24、onmental changes are connected with birds timing and route. Not only magnetic field but also some other capabilities and 5. relate to a first-timer migrants flying. Where do birds migrate? Migration mainly takes place in the 6. Hemisphere. With four major flyways birds mainly fly 7. coasts,rivers,or
25、 mountain ranges. What 8. can you draw from the bird migration? Birds are 9. to their site attachment very much. You must make sure the clean boxes are 10. before the birds come back. 参考答案 自主预习 1.e 2.b 3.d 4.f 5.g 6.c 7.a 8.h 9.l 10.n 11.m 12.j 13.k 14.o 15.i 课堂探究 二、Task 1:a Task 2:Paragraph 1:b;Par
26、agraph 2:a;Paragraph 3:d;Paragraph 4:e;Paragraph 5:c Task 3:They migrate to find food,seek a partner,or in search of warmer weather. The scientists have found out how the monarch butterfly manages to reach the places where it will spend the winter. The monarch is able to tell the time of day and the
27、 point where the sun is in the sky. Because of human activities the number of the monarch has crashed by as much as 90 per cent in the last few years. The research on the monarchs behavior has led to a greater awareness of it and people have been working together to record its migration and make sur
28、e there are enough plants for it to feed on. Task 4:1.the time of day 2.the way to go 3.the position of the sun 4.the place where it will spend the winter 5.cut down 6.place 7.kill the plants 8.has crashed by as much as 90 per cent Task 5:1.The more careful you are,the fewer mistakes you will make.
29、The harder you work ,the greater progress you will make. 2.where which which He determined to learn Japanese. I am determined to be successful. 一位果敢的领导 三、Task 1. The Monarchs Journey Task 2. Every autumn,North American monarch butterflies migrate a long way to California or Mexico.The journey is dif
30、ficult.Recently,a team of scientists discovered that the monarch butterfly could use the time of day and the position of the sun to find the right way to go.Research also finds out that the number of butterflies is falling greatly due to human activities.Studies let people know more about monarch butterflies and call on us to do more to protect them so as to increase their number and keep their place in nature. 核心素养专练 四、1.food 2.possibility/chance 3.How 4.helpful 5.experience 6.Northern 7.following/along 8.conclusion 9.faithful 10.available/ready
