(
课件网) Unit 5 Revealing Nature Using Language--Listening & Speaking Biodiversity Learning Objectives At the end of the class, you will be able to: Learn different forms of life by listening and reading Sort out words and expressions related to biodiversity and describe the species using the related words and expressions Strengthen the awareness of protecting biodiversity and develop the interest in exploring nature What is the theory of evolution In his book On the Origin of Species, Darwin explained the theory of evolution: living things, including humans, had evolved from lower forms of life. Every species is lovely and special! Lead in: different life forms on earth Listen to the podcast and answer the questions. 1.What is the oldest life forms on earth 2.What kind of the oldest life form is mentioned in the material bacteria Ⅰ.the oldest life forms microorganism What Bateria:_____ microorganism Where in the _____, in _____, and even _____. Amount An average human body contains around _____ bacteria cells. Role 1. Most bacteria in your body help with _____. 2. They help _____ that goes into your stomach, such as cheese, yoghurt and vinegar. 3. Bacreria are also helpful at the other end of the _____They have an important role dealing with _____ and that of _____. Bacteria break down this waster and other dead, organic matter, like fallen leaves, into _____. single-celled inside your body make the food your waste other organisms nutrients digestion food production process thirty-nine trillion air water Listen and complete the fact sheet Do you think bacteria are special Why Complete the paragraphs. is home to are native to scientific habitats ecosystem appearance primitive ancestor Word Bank Galapagos island 加拉帕戈斯群岛 Santa Cruz 圣克鲁斯岛 tortoise 陆龟 mangrove 红树 Isabela 伊莎贝拉岛 Iguana 鬣蜥 San Cristobal 圣克里斯托瓦尔岛 Ⅱ.life forms on Galapagos island What species are there What made them special Summarize words and expressions to describe species. Physical feature Where Role in ecosystem be important to serve as help with be useful at have a special appearance with... ... metres in length weigh over ...kilos sp is home to sth is native to sp is renowned for sth can be found in What kind of species native to China do you know of Ⅲ.life forms in China Diversiform-leaved poplar Draw a mind map to make introduction Ⅳ.extinct life forms 1.What happened to the Pinta Island tortoise Why 2.What lessons can you learn the Pinta Island tortoise Read the passage in page 71 and answer the questions. Prepare a speech to call on people to help maintain the biodiversity! You should include the analysis of the current situation and measures to protect it. group work make efforts to build a community of all life on earth! Homework 1.Polish your speech and deliver the speech to your classmates. 2.Find more species you are interested in and introduce them to your classmates. Thinks for Lis ... ...
