Unit 3 Period 1 Topic Talk & The Sixth Extinction（课件）英语北师大版选择性必修第一册

该高中英语课件围绕“物种灭绝”主题，聚焦第六次灭绝的原因、影响及应对措施。课堂导入通过图片观察和“mass extinction”提问激活兴趣，Pre-reading结合预测与选择题搭建背景知识支架，While-reading以段落主旨分析、细节提取等任务引导文本深入理解，形成连贯的知识脉络。 其亮点在于融合语言能力与思维品质培养，通过skimming/scanning策略训练信息获取能力，结合黑知更鸟案例分析提升批判性思维。Post-reading的小组讨论与“Take Action”倡议强化文化意识，分层作业设计兼顾基础与提高需求。学生能在语言实践中增强环保责任感，教师可依托清晰环节提升教学效率。

高中英语北师大版选修第一册 Unit 3 Conservation Topic Talk & The Sixth Extinction Understand species extinction texts, get key information, sort structure; discuss and ask questions from the text to improve reading and speaking. Enhance environmental protection awareness, and inspire a sense of responsibility to protect the Earth and safeguard species. Use skimming and scanning to obtain information; improve cooperation and thinking abilities through group work. Learning objectives Contents 1. Lead in 2. Pre-reading 3. While-reading 4. Post-reading 5. Summary 6. Assessment 7. Homework 01. Lead in 1.Look at these images. What do they make you think about? Lead in 1.7.2013 ‹#› 2. Have you ever heard of 'mass extinction'? Lead in 1.7.2013 ‹#› 02. Pre-reading 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. Pre-reading 1.7.2013 ‹#› Choose the option based on your knowledge. 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. Pre-reading 03. While-reading A. Narration (记叙文). B. Argumentative Essay (议论文). C. Expository Writing (说明文). D. News Report (新闻报道). 1. What is the text type of the passage? 说明文：旨在解释、阐述某个主题，让读者了解事物的本质、原理、特点等。说明文通常以事实、数据、逻辑推理等方式展开论述。 While-reading 2. Read the text about extinction and find the main idea for each paragraph. Para.1 Para.2 Para.3 Para.4 a causes/reasons of extinction b what might happen c what we can do d background history While-reading Read a text about extinction. Then check your answers. 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. While-reading background information Main reasons that cause extinctions Read Para.1 carefully and complete the detailed information The sixth extinction Two notable extinctions and their consequences The number of extinctions that have occurred so far Meaning of extinction: While-reading admin (a) - Extinction Meaning of extinction __________________ __________________ The number of extinctions that have occurred so far ______________________________________ Two notable extinctions and their consequences _____________ Main reasons that cause extinctions ____________ Read Para.1 carefully and complete the detailed information entire species are wiped out five times Background Information While-reading Main reasons that cause extinctions ________________________________________________________________________________________________________________ volcanic eruptions, asteroids hitting the Earth from space, changes in sea levels, the decrease of oxygen content of the sea, global warming Two notable extinctions and their consequences ________________________________________________________________________________________________________________________________ the third mass extinction, killed 90% to 96% of all species; the fifth event, which occurred 66 million years ago, caused the death of the dinosaurs While-reading Read Para. 2 and answer the questions. 1. What did scientists find out in 2015? They found that human activity is causing species to die out 1,000 times faster than normal. 2. What are the main reasons that cause the sixth extinctions? 1) Air and water pollution; 2) Forests being destroyed; 3) Factory farming; 4) Overfishing. While-reading Read Para. 3 and answer the question. 3. Why does the writer believe we’ll probably die out if 75% of the Earth’s species die out? Because our world and our lives depend on the balance in nature between animals and plants. Human beings are closely related to nature While-reading Read Para. 4 and answer the question. 4.What can people do to avoid the extinction? Change the way we live; Set up special areas for endangered species; Change the way we work and travel; Improve our farming methods to reduce water, air and land pollution. While-reading Read the case of The Black Robin, what can we conclude from the data of the case. The case study shows that it is never too late for us to take action to do something to protect our planet. While-reading 04. Post-reading As a teenager, what should we do to protect the environment. ·Protect wildlife habitat. · Recycle and buy sustainable products. · Stop or reduce the use of disposable things such as disposable chopsticks and disposable packaging. ·Never purchase products made from threatened or endangered species. .... Critical Thinking: Group Discussion Post-reading Now 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 Post-reading 1.7.2013 ‹#› 05. Summary Summary 06. Assessment Learning Objectives Score(1-5) 1.After learning, I am able to read and talk about extinction. 2.After learning, I am able to read and understand words and expression in context. 3.After learning, I am able to enhance environmental protection awareness, and inspire a sense of responsibility to protect the Earth and safeguard species. 5-完全能；4-基本能；3-不确定；2不太能；1-完全不能 Assessment 07. Homework 基础层 80 词小短文，介绍第六次物种灭绝危机，至少使用 5 个本课主题短语，2 处定语从句。 提高层 演讲稿《My Ideas on Wildlife Conservation》（100 词），结合黑知更鸟案例，列举 2 个人类破坏行为、对应解决办法，多处运用限定 / 非限定定语从句。 Homework Thank you for your listening $