Unit 5 Into the wild-Understanding ideas（ppt课件） -2022新外研版（2019）《高中英语》必修第一册.pptx

1、外研版(2019)必修一Unit 5 Into the WildUnderstanding ideasLearning aims1.To learn the main idea of the passage.2.To understand migrations of the butterfly and know the impacts of human behaviours on its survival.3.To use some important expressions correctly.monarch butterfly黑脉斑蝶What is migration？monarch bu

2、tterflyAtlantic salmonkiller whaleSiberian craneMigration refers to the movement of a species from one habitat to another in response to seasonal changes to the environment.Often covering great distances and involving huge numbers of animals,it can be fascinating to observe.Migration happens in all

3、parts of the animal kingdom,from fish and insects to birds,reptiles and mammals.The Monarchs Journeydefinitionpurposemovement n.动作，活动 seek v.寻找，寻求in search ofseek to do sth.设法做某事seek(for)sth.寻找/谋求某物seek after 追求；寻求seek out 找出；搜出e.g.He is a man who likes seeking after wealth and power.Why monarch but

4、terflies migration is the most wonderful one in nature?Every autumn,millions of these beautiful insects with fine black and orange wings begin a long and difficult journey.Why monarch butterflies can find their way to California or Mexico?Two pieces of information：the time of day the point where the

5、 sun is in the skyThe Monarchs Journeydeterminev.测定，确定拓展延伸determine to do sth.决心做某事(表动作)determine on/upon(doing)sth.决定(做)某事determined adj.坚决的，有决心的，果断的 be determined to do sth.决心做某事(表状态)determination n.决心，决定The Monarchs JourneyLets practise.用正确的词组填空We fulfill the task.我们决心完成任务。I setting up my own bus

6、iness after graduation.我已决定毕业后创业。My teachers talk woke me up,and I study harder.老师的话唤醒了我，我决定更加努力地学习。have determined on/upon determined to was determined to dComplete the sentences with expressions from the passage.Then use the sentences to complete the“cause-effect”flow chart.a.The monarch butterfly

7、 is able to tell _.b.Using these two pieces of information,the monarch butterfly determines _.c.The monarch butterfly measures _ with its eyes.d.The monarch butterfly reaches _.the time of daythe way to gothe position of the sunthe places where it will spend the wintera/cc/abtips：阅读短文时，掌握篇章结构，能更好地帮助

8、理解全文。The Monarchs Journey he.Humans _ trees.f.The _ where monarchs can be found is destroyed.g.Humans use chemicals that _ that monarch caterpillars eat.h.The monarch butterflys population _ in the last few years.cut downnatural environment of many placeskill the plantshas crashed(by as much as 90 p

9、er cent)e/gg/efLets practise.The Monarchs Journeycut down砍倒,削减e.g.Dont cut down the tree that gives you shade.拓展延伸cut off 切断；停掉；隔绝cut across/through 抄近路穿过e.g.She asked whether we could cut across the square.“the比较级，the比较级”越，越表示后者随着前者的变化而变化，the用在形容词或副词的比较级前Lets practise.A.In a scientific research pap

10、er 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.Where are you most likely to find the passage?Protect the environmentSummarythe general idea of the passage and detailed informat

11、ionMonarch butterflies can find their way to California or Mexico because of two pieces of informationthe time of day the point where the sun is in the skyHuman activity is the main reason why the number of monarch butterflies is falling.some important words and expressionsmigration,cut down,seek,in search of Understand the relationship between human and natureProtect the environmentThank you