Unit 5 Into the Wild Understanding ideas The Monarch's Journey 课件-2024-2025学年高中英语外研版（2019）必修第一册

Unit 5 Understanding Ideas The Monarch’s Journey wild geese elephant seal reindeer swallow Look at the pictures.What do they have in common? Lead-in Look and speak Activity 1 migrant a bird or an animal that moves from one place to another according to the season 候鸟；迁徙动物 Look at the pictures.What do they have in common? Lead-in Look and speak Activity 1 Choose the animals that migrate. monarch butterfly 黑脉金斑蝶/帝王蝶 Siberian crane 西伯利亚鹤 Atlantic salmon 大西洋鲑鱼 Pre-reading Look and choose Activity 2 red panda 小熊猫 killer whale 虎鲸 African lion 非洲狮 Look at the pictures and choose the animals that migrate Pre-reading Look and choose Activity 2 monarch butterfly: large migratory American butterfly having deep orange wings with black and white markings（斑纹）; the larvae（幼体） feed on milkweed（奶草）. Do you know about the monarch butterfly? Pre-reading Think and answer Activity 3 Where are you most likely to find the passage? In a scientific research paper about the monarch butterfly’s migration. a. In a travel leaflet encouraging people to visit North America. c. In a popular nature magazine introducing the monarch butterfly. b. While reading Read for source Activity 4 What is the migration? Many animals move from one place to another at certain times of the years. This annual movement is called migration.They migrate to find food, seek a partner, or in search of warmer weather... While reading Read for details Activity 5 Do you know more about animal migration? Animal migration（动物迁徙）: When birds, fish, or animals migrate, they move at a particular season from one part of the world or from one part of a country to another, usually in order to breed or to find new feeding grounds. While reading Read for details Activity 5 long and difficulty journey with around 4,000 kilometres millions of monasch butterflies One of the most wonderful migrations in nature is that of the North American monarch butterfly. 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. Why is it one of the most wonderful migration? wonderful small and thin wings While reading Read for details Activity 5 A team of scientists led by Professor Eli Shlizerman 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. How could the monarch butterfly trave around 4,000 kilometres to migrate? While reading Read for details Activity 5 d a. The monarch butterfly 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 day the way to go the position of the sun the places where it will spend the winter a c b Cause Effect Effect Complete the sentences with expressions from the text.And use these sentences to complete the “cause-effect”flow charts. While reading Read and complete Activity 6 e. Humans ____________ trees. f. The _________________ where monarchs can be found is destroyed. g. Humans use chemicals that ___________ that monarch caterpillars eat. h. The monarch butterfly’s population ______________ in the last few years. cut down natural environment of many places kill the plants has crashed by as much as 90 per cent h e g f Cause Effect Effect While reading Read and complete Activity 6 Why has the monarch’s population crashed as much as 90 per cent in the last few years? 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. While reading Read and answer Activity 7 What has done to increase the number of monarch butterflies? 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. While reading Read and answer Activity 7 What impresses you most about the monarch butterfly? Its population has crashed by as much as 90 per cent in the last few years. They manage to travel around 4,000 km south ... The monarch butterfly is able to tell the time of day. The monarch butterfly measures the position of the sun with its eyes. Post-reading Think and share Activity 8 What can we learn from the monarch butterfly? teamwork perseverance gratitude respect and cherish life hard-working Post-reading Think and share Activity 8 What can people do to help to protect insects and animals? plant more trees conserve their habitats reduce the use of chemicals enhance environmental awareness know more about them Post-reading Discussion Activity 9 Make a poster to call on people to protect endangered birds, insects and animals. Assignment Thanks! $$