Unit 3 Conservation Lesson 1 The Sixth Extinction 课件-2025-2026学年高二英语北师大版选择性必修第一册

该高中英语课件围绕“第六次大灭绝”主题，系统讲解其定义、与人类活动的关联及应对措施。课堂导入通过图片提问、五次大灭绝趣味介绍和小测验，从生物多样性、濒危动物到灭绝概念，搭建学习支架，引导学生逐步深入主题。 其亮点在于融合思政元素（习近平生态文明思想论述）与批判性思维活动（小组讨论如何避免灭绝、经济与生态辩论），通过倡议书写作等语言实践提升语言能力，结合可持续发展等概念培养文化意识。实例如趣味导入激发兴趣，辩论活动锻炼思维，助力学生树立环保责任感，教师可借助完整教学流程提高教学效率。

The Sixth Mass Extinction Are We Next? 1.7.2013 ‹#› 01 Lead-in 02 Pre-reading 03 While-reading 04 Post-reading 05 Summary 06 Homework CONTENTS 目录 2 Learning Objectives: 1.Define the "Sixth Mass Extinction" and its link to human activities， and master the reading skills. 2.Evaluate humanity's role and responsibility towards other species. 3.Understand concepts like Sustainable Development and Ecological Civilization. 4.Propose and commit to at least one personal action for environmental protection. 1.7.2013 ‹#› 生物多样性是人类赖以生存和发展的重要基础。 习近平总书记指出：“要站在对人类文明负责的高度，尊重自然、顺应自然、保护自然，探索人与自然和谐共生之路，促进经济发展与生态保护协调统一，共建繁荣、清洁、美丽的世界。”“在发展中保护，在保护中发展，共建万物和谐的美丽家园。” 01 Lead-in 5 Lead-in Look at these images. What do they make you think about? 1.7.2013 ‹#› 1. What does 'biodiversity' mean to you? The variety of life on Earth, including all species of plants, animals, and microorganisms. 2. Can you name an endangered animal? Examples: Giant Panda (habitat loss), Blue Whale (hunting). What threats do they face? 3. Have you ever heard of 'mass extinction'? A widespread and rapid decrease in the biodiversity on Earth, such as the extinction of the dinosaurs. 1.7.2013 ‹#› 3. Have you ever heard of 'mass extinction'? 1.7.2013 ‹#› 1. How many times up to today has life on Earth almost died out? A. Once. B. Five times. C. More than 10 times. 2. About what percent of all species on Earth became extinct during the mass extinction known as the "Great Dying"? A. Less than 10%. B. Nearly 50%. C. More than 90%. 3. What do scientists think will cause the next mass extinction? A. Human activity. B. Natural causes. C. Unknown reasons. How much do you know about extinction? √ √ √ 1.7.2013 ‹#› Today, we explore the'Sixth Mass Extinction', a crisis driven by us. 1.7.2013 ‹#› The previous five mass extinctions were triggered by dramatic natural events (asteroids, volcanoes, climate changes), whereas this time, the driving force behind the "Sixth Mass Extinction" is humanity itself. 1.7.2013 ‹#› 02 Pre-reading 12 Can you predict what the text is about according to the title “The Sixth Extinction”? It may talk about the reason of “The Sixth Extinction” and how we can handle the situation. 1.7.2013 ‹#› 03 While-reading 14 1.What caused the extinction of dinosaurs according to the text? A. The third mass extinction B. The fifth mass extinction C. Volcanic eruptions D. Sea level changes 2.What was the third mass extinction called? A. The Great Loss B. The Big Disaster C. The Great Dying D. The Big Extinction B C Fast-reading 1.7.2013 ‹#› 3.What can we learn about the background extinction rate? A. It is caused mainly by human activities. B. It refers to the natural speed of species dying out. C. It has become much higher than before. D. It is totally out of scientists' control. 4.Which is the best title for the passage? A. Five Terrible Ancient Disasters B. Protect Our Endangered Wildlife C. The Coming Sixth Mass Extinction D. Changes of Global Environment B C 1.7.2013 ‹#› Careful-reading Extinction Meaning of extinction ___________________________________________________ The number of extinctions that have occurred so far __________________________________________ How to avoid the sixth mass extinction __________________________________ Main reasons that cause extinctions _______________________________ Two notable extinctions and their consequences. ___________________________________________________ The phenomenon where entire species are wiped out. Five (in the last 500 million years) Significantly change lifestyles Natural causes and human activities Third mass extinction (“Great Dying”): Killed 90% - 96% of all species. Fifth mass extinction: Caused the death of dinosaurs 66 million years ago. 1.7.2013 ‹#› 1. What did scientists find out in 2015? They found that human activity is causing species to die out 1,000 times faster than the natural background extinction rate. 1.7.2013 ‹#› 2. Why does the writer think the sixth mass extinction will come? Because human activities (such as pollution, deforestation, factory farming and overfishing) are destroying the natural environment and causing species to die out at an alarming rate, which scientists believe is leading us into the sixth mass extinction. 1.7.2013 ‹#› 3. Why does the writer believe we’ll probably die out if 75% of the Earth’s species die out? Because human survival depends on the balance of nature between animals and plants. If most species die out, we would lose essential resources like clean air, forests and water, making it impossible for humans to survive. 1.7.2013 ‹#› 4. What did people do in the case study to protect black robins? Which claim(s) did the case study support in the text? Actions taken to protect black robins: Wildlife workers protected the eggs of the last fertile black robin (Old Blue), helped them hatch, raised the chicks, restored their habitats, and removed small animals (like mice and cats) that hunt them. Claims supported: The case study supports the claim that it is not too late to take action to prevent extinction and that human intervention can save endangered species. 1.7.2013 ‹#› 04 Post-reading 22 How can we avert the sixth mass extinction? 1.Reduce our impact on the planet； 2.Protect endangered species and their habitats； 3.Shift to sustainable ways of living； 4.Maintain the balance of nature Critical Thinking: Group Discussion 1.7.2013 ‹#› Nowadays, However 1.7.2013 ‹#› Our Role in the Current Crisis Habitat Destruction We cut down forests like the Amazon for agriculture and development. Climate Change Our burning of fossil fuels disrupts habitats, like melting polar ice for polar bears. Pollution Chemicals and plastic waste poison land and sea, killing marine life. Overexploitation We hunt animals and fish the oceans to depletion, like the Bluefin tuna. 1.7.2013 ‹#› Debate Topic To boost the economy, we have to sacrifice the ecological environment. Environmental loss is the necessary cost of economic progress. Green development is the best way to realize long-term economic prosperity. Group A Group B 1.7.2013 ‹#› Let's Take Action! Every single action counts. The future of biodiversity is in our hands. What will you do today? 01. Adopt a Low-carbon Lifestyle 02. Reduce Disposable Products 03. Make Informed Choices 04. Participate 1.7.2013 ‹#› 05 Summary 28 Key Takeaways 01.We are experiencing theSixth Mass Extinction, driven by human activities. 02.Main causes:habitat destruction, climate change, pollution, overexploitation. 03.This crisis threatenshuman well-beingby disrupting ecosystems. 1.7.2013 ‹#› Sustainable Development (可持续发展) Meeting present needs without compromising future generations. Ecological Civilization (生态文明) Building harmony between humans and nature. A Community with a Shared Future (人类命运共同体) Recognizing our shared home and the need for global cooperation. Social Concepts 1.7.2013 ‹#› Every life matters. Join us to protect nature and live in peace with wildlife Let's take action to protect biodiversity and create a harmonious home for all 1.7.2013 ‹#› 06 Homework 32 假定你是校英语社团的成员李华，你校正在开展“保护生物多样性，共建和谐家园”主题活动，请你以校学生会的名义，向全校同学写一封英文倡议书，呼吁大家参与生物多样性保护行动。 内容要点： 1.简述生物多样性的重要性； 2. 列举当前面临的问题（如栖息地破坏、污染、物种濒危等）； 3.提出至少3条具体的行动建议； 4.发出倡议与号召。 Homework 1.7.2013 ‹#› Thank You! Small actions make a big difference. Together for a greener future 1.7.2013 ‹#› $