Unit 3 Conservation Lesson 1 The Sixth Extinction （ppt课件） -2023新北师大版（2019）《高中英语》选择性必修第一册.pptx

1、-Unit 3 Conservation-Lesson 1The Sixth ExtinctionLead inWhat can you see in the picture?1What does extinction mean?2Pre-reading1.How many times up to today has life on Earth almost died out?a.Once b.Five times c.More than 10 times2.About what percent of all species on Earth became extinct during the

2、 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 reasonsHow much do you know about them?Choose the option based on your knowledge.Pre-reading1.How many times

3、 up to today has life on Earth almost died out?a.Once b.Five times c.More than 10 times2.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 extinc

4、tion?a.Human activity b.Natural causes c.Unknown reasonsHow much do you know about them?Choose the option based on your knowledge.While-readingRead the text about extinction and find the main idea for each paragraph.Para.1Para.2Para.3Para.4a causes/reasonsb what might happenc what we can dod backgro

5、und history While-readingRead Para.1 and answer the question.ExtinctionMeaningThe number of extinction that have occurred so farTwo notable extinction and their consequencesThe usual reasonEntire species are wiped out.Five.The third one(“Great Dying”):Killed 90%to 96%of all species.The fifth one:Cau

6、sed the death of the dinosaurs.Volcanic eruption;Asteroids hitting the Earth from space;Changes in sea levels;The decrease of the oxygen content of the sea and global warming.While-readingRead Para.2 and answer the question.1.What did scientists find out in 2015?2.What are the main reasons that caus

7、e the sixth extinctions?Scientists found that human activity is causing species to die out 1,000 times faster than normal.1)Air and water pollution;2)Forests being destroyed;3)Factory farming;4)Overfishing.While-readingRead Para.3 and answer the question.Why does the writer believe well probably die

8、 out if 75%of the Earths species die out?Because our world and our lives depend on the balance in nature between animals and plants.While-readingRead Para.4 and answer the question.What did people do in the case study to protect black robins?Which claim(s)did the case study support in the text?Chang

9、e 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-readingRead The Black Robin and answer the question.1.What did people do in the case study to protect black robins?2.Which claim(s)

10、did the case study support in the text?The case study showed that even in desperate situations,we can do something to help.In short,its never too late.Post-readingUse different colored pens to highlight at least one example for each of the four elements listed below.facts opinions/predictions reason

11、s solutionsPost-reading facts reasons opinions/predictions solutions123231212331Think&answer1.What text type is this piece of writing?2.What is its communicative purpose?3.What ways of argument does the writer use to convince readers?Are you convinced?Why or why not?1.What text type is this piece of

12、 writing?A.Argumentation(议论文）B.Narration(记叙文）C.Application(应用文）D.Exposition(说明文)2.What is its communicative purpose?Its purpose is to explain what the sixth extinction is and its effects and call on people to take action to prevent it from happening.1.What text type is this piece of writing?This pie

13、ce of writing is an exposition.3.What ways of argument does the writer use to convince readers?Are you convinced?Why or why not?The writer uses ways such as citing ideas from experts or authorities,giving examples and using data.I believe that if we take action now it is not too late to save other s

14、pecies from extinction.The black robin was saved from extinction when only five birds remained,so I think it is possible to save any species if we act right now.Do you know any endangered species?What should we do to help them?South China TigerYangtze River DolphinTibetan Antelope Protect wildlife habitat.Recycle and buy sustainable products.Never purchase products made from threatened or endangered species.Thank you