Unit 3 Conservation Lesson 1 The Sixth Extinction New Words & Phrases 课件 -2026-2027学年高中英语北师大版选择性必修第一册

Species Name Location Natural Habitat Threats Status Polar bear the north frigid zone glacier climate change, sea-ice loss, pollution, human hunting Vulnerable Panda China bamboo forest destruction of habitat, human disturbance Vulnerable The snow leopard Asia near snow line habitat destruction, illegal hunting, Vulnerable The Sumatran tiger Indonesia tropical rainforest / flatland rainforest clearing, hunting, habitat loss Critically Endangered African Elephants Southern Africa forest destruction of habitat, hunting Vulnerable Unit 3 Conservation Lesson 1 The Sixth Extinction Period 1 What percent of all species on Earth have been extinct in the last 500 million years? Name one extinct species. How many times up to today has extinction happened? When did last mass extinction occur? How much do you know about extinction? Scan the text on p52 and find out answers. Over 90% 5 times Dodo, passenger pigeon… 66 million years ago First, let’s take a quick test to see how much you know about extinction. Many scientists believe the first true animals began to emerge on earth around 500 million years ago. Since then, it is believed that 4 billion species have evolved on earth. !!!Write down at least one question on your handout. 3 Extinctions Meaning Two notable extinctions and their consequences Reasons Entire species are 1._________ . The third mass extinction (the “Great Dying”): Killing 90% to 2. ______of all species. The fifth event: Causing the 3._______ of the dinosaurs. ★Volcanic 4.__________. ★Asteroids 5._________the Earth from space. ★6. ________ in sea levels. ★The 7.________ of the oxygen content of the sea. ★Global 8. _________. 96% death hitting warming decrease wiped out eruptions Changes Read Para.1 to find the background information about 5 times of extinction. Be a careful reader. Natural Causes Many scientists say we are now entering the Earth’s sixth mass extinction. This time, human activity will be to blame. Be a careful reader. Read para.2 and get the human activity of the sixth mass extinction. Human activity of the sixth mass extinction Air and water pollution forests being destroyed factory farming overfishing. causes species to die out 1000 times faster than normal. Be a careful reader. Read para.3 and list the possible consequences of the sixth mass extinction. up to three quarters of all species on earth could die out. We humans would also be at risk of dying out. Possible consequences of the sixth mass extinction Human beings are closely related to nature Why? Our world and our lives depend on the balance in nature between animals and plants. Can a sixth extinction be avoided? Experts say that it is not yet too late, if we take action now. 1. What did people do to protect black robins? 2. What is the effect of their efforts? Be a careful reader. Read para.4 and summarize the actions we can do to avoid the sixth extinction. Actions we can do to avoid the sixth mass extinction change the way we live; save endangered species ; set up special areas; change how we work and travel; improve our farming methods Stop destroying Start to protect Effective measures have been taken all over the world to protect endangered species.What can we do to protect those endangered animals? Think and Express. refuse products made from endangered animals. learn more knowledge about endangered animals. not hunt or hurt wild animals. tell our family and friends to protect wildlife. protect their living habitats. reduce pollution to keep their home safe. First of all / To start with Besides / What’s more / Furthermore Last but not least In short / All in all First of all, we should refuse products made from endangered animals. Besides, we can learn more about wildlife and tell people around us to protect them. What’s more, we should cut down pollution to protect their habitats. All in all, small actions can make a difference. Homework Choose one endangered species saved from extinction and look for information online including: Living condition before measures taken (e.g. population) Protective measures Living condition after measures taken For your reference: https://www.nhm.ac.uk/discover/ten-animals-we-have-saved-from-extinction.html https://medium.com/taronga-conservation-society-australia/10-endangered-species-saved-from-extinction-by-zoos-682c454d0125 Examples, demo with interesting pictures 10 Unit 3 Conservation Lesson 1 The Sixth Extinction Period 2 1. What is the text type of this piece of writing? A. Narration B. Description C. Exposition D. Argumentation Be an intensive reader. Exposition a text explaining a process in a sequence about some facts a text providing a comparison and contrast between two things a text providing a classification of things a text explaining a cause and effect relationship a text presenting a problem and solution relationship the sixth extinction Para.1: The background information about extinctions. Para.2: Main reasons of the sixth mass extinction. Para.3: Possible consequences of the sixth mass extinction. Para.4: Actions we can do to avoid the sixth mass extinction. WHAT (Problem) WHY Consequences HOW Be a skillful mindmapper Draw a mindmap about the structure of the passage. 2. What ways can we use in exposition? Find examples from the passage. A. Citing ideas from experts or authorities B. Giving examples E. Using comparison and contrast D. Referring to common knowledge C. Using data Be an intensive reader. F. Giving definition A. Citing ideas from experts or authorities B. Giving examples C. Using data D. Referring to common knowledge A C D B E. Using comparison and contrast E F. Giving definition F Extinction plays an important role in the evolution of life because it opens up opportunities for new species to emerge. Can a sixth extinction be avoided? ✅ Pro: Although biodiversity loss is serious, the sixth extinction can be avoided through global effort, technology and wildlife conservation. Can a sixth extinction be avoided? ❌ Con: Despite conservation efforts, the sixth extinction cannot be avoided because irreversible damage has already been done. P (Point 观点句) One reason to support the idea that … is that … E (Evidence 论据) For example, … / Research shows that … / A typical case is … E (Explanation 解释，链接论点) This means that … / This proves that … because … L (Link 回扣主题) Therefore, it shows that … Think and Express. Homework Sort out your opinions about the sixth extinction. Thanks for your listening! $