Unit 3 Lesson1 The Sixth Extinction Language Points 课件-（2022）新北师大版《高中英语》选择性必修第一册.pptx

1、extinction n.灭绝，消亡extinct adj.灭绝的 n.选项 which is base on 基于，以为根据过去分词做定语灭绝一次；曾经；一旦百分比大量的massive巨大的；大量的bcaExtinctions,where entire species are wiped out,are not unusual in our Earths history.In fact,over 90 percent of all species that ever lived are now extinct.In the last 500 million years,there have

2、been five times when life on Earth has almost ended.These include the third mass extinction,known as the Great Dying,which killed 90%to 96%of all species.And the fifth event,which occurred 66 million years ago,caused the death of the dinosaurs.wipe out 消灭消灭n.物种物种不同寻常的不同寻常的in fact事实上事实上灭绝的灭绝的v.包括包括大量

3、的 occur v.出现出现 death n.死亡死亡die v.死亡死亡dead adj.死亡的死亡的 Step 1 单词清扫单词清扫adv.几乎 n.事件事件entire adj.全部的全部的known as 被认为是；以而闻名times 次数（time）的复数形式；时代Extinctions,where entire species are wiped out,are not unusual in our Earths history.In fact,over 90 percent of all species that ever lived are now extinct.In the

4、 last 500 million years,there have been five times when life on Earth has almost ended.These include the third mass extinction,known as the Great Dying,which killed 90%to 96%of all species.And the fifth event,which occurred 66 million years ago,caused the death of the dinosaurs.Step 2 句子切割：找出关系词、连词、

5、介词、副词等句子切割：找出关系词、连词、介词、副词等Step 3 句子切割：找出固定搭配等成块短语句子切割：找出固定搭配等成块短语Step 4 句子切割：找出句子切割：找出v.v系系S1V系系SV系系v1Vwhich is过去分词做定语，表被动v1VStep 5 分析句子结构分析句子结构The reasons for extinctions are varied.According to scientists,they include volcanic eruptions,asteroids hitting the Earth from space,changes in sea levels,

6、the decrease of the oxygen content of the sea and global warming.Many scientists say we are now entering the Earths sixth mass extinction.This time,human activity will be to blame.vary v.变化变化 variety n.种类；多样化种类；多样化v.包括包括 adj.火山的火山的 n.喷发喷发 space n.空间空间,空白空白;太空太空level n.空水平空水平,层次层次 n./v.减少减少content n.

7、目录目录;所含物；内容所含物；内容;含量含量blame v.责怪责怪Step 1 单词清扫单词清扫varied adj.各种各样的各种各样的 The reasons for extinctions are varied.According to scientists,they include volcanic eruptions,asteroids hitting the Earth from space,changes in sea levels,the decrease of the oxygen content of the sea and global warming.Many sci

8、entists say we are now entering the Earths sixth mass extinction.This time,human activity will be to blame.句子切割句子切割&分析结构分析结构V系系V现在分词做定语VV系系S1thatvaried adj.各种各样的各种各样的 vary v.变化变化 variety n.种类；多样化种类；多样化include v.包括包括volcanic adj.火山的火山的eruption n.喷发喷发space n.空间空间,空白空白;太空太空level n.空水平空水平,层次层次decrease n

9、./v.减少减少content n.目录目录;所含物；内容所含物；内容;含量含量blame v.责怪责怪Although it is not unusual for species to die out naturally,the rate at which this is now happening is cause for concern.A 2015 study by scientists who were based at Brown University and Duke University in the US,looked at how quickly species die o

10、ut due to natural causes,that is,the background extinction rate.it+be+adj+for sb.+to do sth.at the rate 以以的速度；按的速度；按的比率的比率rate n.速率速率;比率比率 v.评价评价n./v.关心关心look at 看；着眼于看；着眼于due to 因为因为背景，后台背景，后台They found that human activity is causing species to die out 1,000 times faster than normal.There is a long

11、 list of reasons why so many species are dying out:air and water pollution,forests being destroyed,factory farming and overfishing.It is clear that human activity has negatively affected all other species on Earth,including animals and plants.normal adj.正常的正常的,标准的标准的名单名单n.污染污染n.森林森林destroy v.破坏 n.工厂

12、工厂farm n.农场 v.耕种overfish v.过度捕捞it is+adj+that 强调句式强调句式negatively adv.消极地；否定地If a sixth mass extinction occurs,scientists who have studied the issue believe that up to three quarters of all species on Earth could die out.Of course,as we humans depend on so many species for our survival,we would also

13、be at risk of dying out.Our world and our lives depend on the balance in nature between animals and plants.occur v.出现出现 V1S1VSO从从V2issue n.问题问题up to 高达，总计高达，总计quarter n.1/4；一刻钟；一刻钟 as 由于由于+(原因状从原因状从)depend on 依靠依靠.survival n.生存生存survive v.幸存幸存 survivor n.幸存者幸存者 risk n.危险危险,风险风险 v.冒险冒险at risk of 有有危险

14、的危险的Without forests,we would have no air to breathe,and without clean water we would be unable to survive.Can a sixth extinction be avoided?Experts say that it is not yet too late,if we take action now.没有没有breathe v.呼吸呼吸breath n.呼吸呼吸unable adj.不能的不能的,不会的不会的able adj.能的能的,会的会的be able to do sth.能够做某事能够

15、做某事survive v.幸存幸存survival n.幸存幸存survivor n.幸存者幸存者avoid v.避免，回避避免，回避yet adv.仍然仍然,还；还；conj.然而，但是然而，但是not yet 还没有，还没还没有，还没采取行动采取行动take measures 采取措施采取措施This would mean we have to significantly change the way we live.For example,we need to take steps to save endangered species,including setting up speci

16、al areas where plants and animals can be protected.We need to change how we work and travel by using cleaner,more natural sources of energy,such as wind and solar energy.V1have to 不得不V1VV2significantly adv.显著地显著地,大大地大大地thatVadj.(动植物动植物)濒危的濒危的take steps 采取措施=take measuresprotect v.保护保护protection n.保护

17、保护where=at the areas n.面积，面积，区域区域source n.来源来源energy n.精力精力;能源能源solar adj.太阳的太阳的We also need to improve our farming methods to reduce water,air and land pollution.In short,if we want to survive,we need to stop destroying the planet that we live on and start to protect it.improve v.改善，提高改善，提高farm n.农

18、场农场 v.种田；务农种田；务农method n.方法方法pollution n.污染污染pollute v.污染污染 in short 简而言之简而言之V1V2 destroy v.破坏；摧毁破坏；摧毁 重点词、短语回顾重点词、短语回顾extinction n.灭绝，消亡extinct adj.灭绝的massive adj.巨大的；大量的mass adj.大量的base on 基于，以为根据entire adj.全部的species n.物种wipe out 消灭in fact 事实上unusual adj.不同寻常的times 次数（time）的复数形式；时代vary v.变化 varie

19、ty n.种类；多样化varied adj.各种各样的 various adj.各种各样的 space n.空间,空白;太空level n.空水平,层次at the rate 以的速度；按的比率normal adj.正常的,标准的destroy v.破坏verfish v.过度捕捞negatively adv.消极地；否定地quarter n.1/4；一刻钟 risk n.危险,风险 v.冒险at risk of 有危险的survive v.幸存survival n.幸存survivor n.幸存者avoid v.避免，回避take measures 采取措施take action 采取行动significantly adv.显著地,大大地endangered adj.(动植物)濒危的protect v.保护protection n.保护area n.面积，区域farm n.农场 v.种田；务农method n.方法destroy v.破坏；摧毁pollution n.污染pollute v.污染