Unit 3 Conservation Lesson 1 The Sixth Extinction 课件-2023-2024学年高中英语北师大版(2019)选择性必修第一册

Unit 3 Conservation Lesson 1 The Sixth Extinction What is the common part about the species in the picture? ? Be a sharp observer. Extinct No longer in existence Extinction The Sixth 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 extinctions. Be a careful reader. Be a careful reader. Read para.2 and get the main reasons of the sixth mass extinction. Main reasons of the sixth mass extinction Air and water pollution forests being destroyed factory farming overfishing. Human activity 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 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 save endangered species change how we work and travel improve our farming methods Change the way we live 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 b