高中英语北师大版 (2019)选择性必修 第一册Lesson 1 The Sixth Extinction课文内容课件ppt

这是一份高中英语北师大版 (2019)选择性必修 第一册Lesson 1 The Sixth Extinction课文内容课件ppt，共57页。PPT课件主要包含了Content，Lead-in，Summary，Assessment，Homework等内容，欢迎下载使用。
Learning Objectives
Understand species extinctin texts, get key infrmatin, srt structure; discuss and ask questins frm the text t imprve reading and speaking.
Master key vcabulary and phrases; understand and use restrictive and nn-restrictive attributive clauses.
Enhance envirnmental prtectin awareness, and inspire a sense f respnsibility t prtect the Earth and safeguard species.
Use skimming and scanning t btain infrmatin; imprve cperatin and thinking abilities thrugh grup wrk.
What can yu see frm these pictures and the vide?D yu knw what these prblems are related t? Have yu heard f species extinctin? Can yu name sme extinct species?
Pre-reading
Hw much d yu knw abut extinctin? Chse the ptin based n yur knwledge.1. Hw many times up t tday has life n Earth almst died ut?a. Once. b. Five times. c. Mre than 10 times.2. Abut what percent f all species n Earth became extinct during the mass extinctin knwn as the “Great Dying”?a. Less than 10%. b. Nearly 50%. c. Mre than 90%.3. What d scientists think will cause the next mass extinctin?a. Human activity.b. Natural causes.c. Unknwn reasns.
Read a text abut extinctin.Then check yur answers in Activity 1.
1. Hw many times up t tday has life n Earth almst died ut?a. Once. b. Five times. c. Mre than 10 times.2. Abut what percent f all species n Earth became extinct during the mass extinctin knwn as the “Great Dying”?a. Less than 10%. b. Nearly 50%. c. Mre than 90%.3. What d scientists think will cause the next mass extinctin?a. Human activity. b. Natural causes. c. Unknwn reasns.
While-reading
What is the main idea f the text?
The text discusses Earth's mass extinctins, highlights human - caused sixth extinctin risks, and calls fr prtective actins.
Circle the names f histrical mass extinctin events mentined in the text.
Read the text. Cmplete the ntes. Then talk abut the different aspects f extinctins.
The phenmenn where entire species are wiped ut.
Significantly change lifestyles
Natural causes and human activities
Third mass extinctin（“Great Dying”）: Killed 90% - 96% f all species.Fifth mass extinctin: Caused the death f dinsaurs 66 millin years ag.
Five (in the last 500 millin years)
Read again. Answer the questins.
1. What did scientists find ut in 2015?2. Why des the writer think the sixth mass extinctin will cme?3. Why des the writer believe we’ll prbably die ut if 75% f the Earth’s species die ut?4. What did peple d in the case study t prtect black rbins? Which claim(s) did the case study supprt in the text?
1. What did scientists find ut in 2015?
Extinctins, where entire species are wiped ut, are nt unusual in ur Earth’s histry. In fact, ver 90 percent f all species that ever lived are nw extinct. In the last 500 millin years, there have been five times when life n Earth has almst ended. These include the third mass extinctin, knwn as the “Great Dying”, which killed 90% t 96% f all species. And the fifth event, which ccurred 66 millin years ag, caused the death f the dinsaurs. The reasns fr extinctins are varied. Accrding t scientists, they include vlcanic eruptins, asterids hitting the Earth frm space, changes in sea levels, the decrease f the xygen cntent f the sea and glbal warming. Many scientists say we are nw entering the Earth’s sixth mass extinctin. This time, human activity will be t blame.
2. Why des the writer think the sixth mass extinctin will cme?
3. Why des the writer believe we’ll prbably die ut if 75% f the Earth’s species die ut?
Of curse, as we humans depend n s many species fr ur survival, we wuld als be at risk f dying ut. Our wrld and ur lives depend n the balance in nature between animals and plants.
4. What did peple d in the case study t prtect black rbins? Which claim(s) did the case study supprt in the text?
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Peple began a prgramme fr raising black rbin chicks, prtected Old Blue’s eggs, helped them t hatch, and tk care f the chicks. The case study supprts the claim that human activity can have an impact n species survival and that cnservatin effrts can help prtect endangered species.
Pst-reading
Debate and Writing
We firmly disagree that “natural selectin excuses human indifference t extinctin”. The text prves human activities, like pllutin and defrestatin, speed up species lss 1,000 - fld. Mrever, species interdependence is key t human survival—plants prduce xygen, animals sustain eclgical cycles. Ignring this breaks nature’s rules and risks ur future. Thus, active prtectin, nt passive acceptance, is vital.
Creative Extensin and Actin Plan
Suppse yu are a vlunteer f an envirnmental prtectin rganizatin. Design a campus campaign t prmte the idea f “Preventing the Sixth Mass Extinctin” t yur classmates. Refer t measures in the text like “setting up prtected areas”, “switching t cleaner energy”, and “imprving farming methds”. Plan activity frms (e.g., pster exhibitins, theme speeches, simulatin practices). Explain hw each part cnnects t the text and cnveys cnservatin ideas. Write a 200 - wrd activity plan.
“Fight fr Our Planet: Stp the Sixth Mass Extinctin” Campus Campaign1. Pster ExhibitinShw text slutins like "prtected areas" and "clean energy" n psters, linking t the text's "change lifestyles" call.2. Themed SpeechA vlunteer shares text facts: human-caused extinctin rates, species lss endangering humans (e.g., n plants, n xygen). Link t the text's warning abut lsing nature's balance.3. Simulatin PracticeStudents build mini habitats with "prtected species" (like the text's black rbin), explring hw this fits the text's "save species via special areas" idea.This campaign uses text inf t inspire actin, shwing small text-based steps can help stp the sixth extinctin.
1. Write a 70-90 wrd paragraph abut an envirnmental prblem in yur cmmunity (e.g., plastic pllutin, air pllutin). Explain its causes and suggest ne r tw slutins, using at least ne relative clause.2. Chse ne f the qutes in the "Qute... Unqute" sectin. Paraphrase it in yur wn wrds (30-50 wrds) and briefly explain why yu agree r disagree with it, linking it t what yu learned in the lessn.