高中英語外研版 (2019)必修第一冊Unit 5 Into the wild教課內(nèi)容ppt課件-課件下載-教習(xí)網(wǎng)

Unit5 Into the WildThe Monarch's JourneyLead-inChoose the animals that migrate. monarch butterflySiberian crane red pandaAtlantic salmonkiller whaleAfrican lionActivity 1114053860@qq.comMany animals move from one place to another at certain times of the year.114053860@qq.comOne of the most wonderful migrations in nature is that of the north American Monarch butterfly.114053860@qq.com 1.One of the most important butterflies in the America.2.Big size and colorful wings with white dots and black strips.3. Be good at disguising to avoid capture.4.Migrate every year in groups.FEATURES： The Monarch’s Journey 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 search of warmer weather. One of the most wonderful migrations in nature is that of the North American monarch butterfly..)What is the main purpose of the first paragraph?To explain what migration exactly is.B. To tell us the reasons for migration.C. To introduce the topic of the text.D. To tell us how many animals migrate.2. Which of the following is not a purpose of a migration?To find food.To find a partner.In search of warmer weather.To travel.Look and predictWhere are they going?North or south? 2.Every autumn，millions of these beautiful insects with fine black and orange wings begin a long and difficult journey. Somehow they manage to travel around 4，000 kilometres south and find their way to California or Mexico. However，until recently no one knew how they did this.3. According to the text, many animals migrate ( )at a fixed time every yearevery yearat an unfixed time every yearevery autumn 3.A team of scientists led by Professor Eli Schlizerman at the University of Washington has now found the answer. They have found out that the monarch is able to tell the time of day. 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 manages to reach the places where it will spend the winter.4. What will probably happen to the monarch butterflies if it is cloudy?They may lose their way.They can’t see anything.They can’t find any food.They will feel very cold. 4.The solution to the mystery of the monarch’s amazing ability comes at a time when it is in serious trouble. Its population has crashed by as much as 90 per cent in the last few years. Sadly，human activity is the main reason why the number of monarch butterflies is falling. In many of the places where the butterfly can be found，people are destroying the natural environment. They cut down trees and use chemicals that kill the plants that monarch caterpillars eat.5．What does the word “crash” in Paragraph 4 mean?A．Succeed．　　　　　　　 B．Fail．C．Increase． D．Drop．Group DiscussionWhat can people do to help protect the monarch butterfly? 5.The research on the monarch’s behaviour has however led to a greater awareness of this creature. People have been working together to record its migration and make sure that there are enough plants for it to feed on. If this works，there may come a time when the number of monarch butterflies increases once again. 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. Reasons for declined population of MonarchGroup Discussion What can people do to help protect the monarch butterfly?We should organize more activities or attend more activities to attract people’s attention to them. Only when all the people raise the awareness can animals be protected.114053860@qq.comThanks