Unit 5 Revealing nature Listening and Speaking 学案-2023-2024学年高中英语外研版（2019）选择性必修第一册

Unit 5 Period 3 Listening and Speaking 【学习目标】 Learning Objectives 1 To get the main idea of the passage and list expressions related to biodiversity by reading 2 To get the main idea of the listening material and write down useful expressions related to the topic of cells and bacteria and make a conversation about biodiversity 【学习过程】 Learning activities 目标一: To get the main idea of the passage and list expressions related to biodiversity by reading Activity 1: Read the passage quickly and get the main idea of it. Earth is home to millions of different species. Some can be very small, like bacteria and viruses, which are so small that we cannot see them with only our eyes. By contrast, the largest animal species so far found on our planet is the blue whale, which can grow up to almost 30 metres in length and weigh over 130,000 kilos. The toughest species is probably the water bear. This tiny organism can survive temperatures from 150 ℃ to a below freezing -272 ℃. To best survive in their environment, each species has developed its own unique physical characteristics. Each year, scientists identify around 15,000 new species. However, diversity on our planet is such, that there are still millions of species on Earth remaining to be discovered. Answer: _____________________________________________________________________ _____________________________________________________________________ Activity 2: Read the passage and answer the questions. 1 What species are mentioned and what is special about them? 2 What other unusual life forms do you know of? Answers: _____________________________________________________________________ _____________________________________________________________________ Activity 3:Complete the paragraphs with the correct form of the words and expressions in the box. ancestor scientific be native to primitive habitat appearance be home to ecosystem 1 The Galapagos Islands are renowned worldwide for their unique biodiversi