Unit 5 Understanding Ideas （ppt课件） (2)-2022新外研版（2019）《高中英语》必修第一册.pptx

1、Unit 5 Into the wildUnit 5 Into the wildThe Monarchs JourneyWhat is migration?What is migration?the periodic passage 周期性 of groups of animals(especially birds or fishes)from one region to another for feeding觅食 or breeding繁殖What are the relationships 关系 between the people and the animals?A.Harmonious

2、B.HostilityThe Monarchs JourneyWhy does the author write this passage？Look at the last sentence of paragraph 1.Many animals move from one place to another at certain times of the year.This annual movement is called migration.They migrate to find food,seek a partner,or in search of warmer weather.One

3、 of the most wonderful migrations in nature is that of the North American monarch butterfly.At certain time 在特定时间段All the time 一直At one time 一次Sometimes 有时Sometime 在过去或者未来的没有特定的某一时间in search of=look for=seek for 寻找What is monarch butterflys migration?migrationTime?Route Destination Length Every autu

4、mnTo California or MexicoFrom north to southAround 4,000 kilometers Somehow,they manage to travel around 4,000 kilometers south and find their way to California or Mexico.N.Manager 经理 N.Management 经营管理 Manage to do sth 设法做某事 他设法完成学习目标How they did this？How butterflies migrate?How butterflies migrate?

5、The monarch is able to tell the time of day.It uses its eyes to measure the position of the sun.It uses its eyes to measure the position of the sun.These two pieces of information the time of day and the point where the sun is in the sky allow the butterfly to determine the way to go.Eventually,it m

6、anages to reach the places where it will spend the winter.MeasureVt.测量，测定VI.距离为 N.措施 Take measures to do sth 他采取措施去解决问题Determine to do sth 决定做某事=decide to do sthN.Determination 决心Adj.determined 坚决的The solution to the mystery of the monarchs amazing ability comes at a time when it is in serious troub

7、le.Why are butterflies in trouble？Para.4What is the butterflys difficulty?What is the butterflys difficulty?Its population has crashed by as much as 90 per cent in the last few years.Why are butterflies in trouble？Sadly,human activity is the main reason why the number of monarch butterflies is falli

8、ng.l In many of the places where the butterfly can be found,people are destroying the natural environment.l They cut down trees and use chemicals that kill the plants that monarch caterpillars eat.What should we do?Protect animals People have been working together to record its migration and make sure that there are enough plants for it to feed on.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.To love animals is to love ourselves!