选修6选修6Unit5The-power-of-nature公开课优质ppt课件.ppt

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1、Unit 5 The power of natureWarming up&ReadingHuman beings powerHave you ever considered how weak humans are compared with a volcano,hurricane or earthquake?Can you list some natural disasters?natural disasterssandstormtyphoon floodhurricane tornadoearthquaketsunamilandslidesnowstormdroughttsunamieart

2、hquake snowstormfloodtyphoonsandstormdroughthurricanecyclone tornado landslide Have you everseen a volcano?volcano-eruptionVesuvius volcanoPompeii 公元公元79年维苏威火山的年维苏威火山的爆发掩埋了一座城市！爆发掩埋了一座城市！虽然地球史上每一次火山虽然地球史上每一次火山爆发无不令地貌沧海桑田爆发无不令地貌沧海桑田,但公元但公元79年维苏威火山的年维苏威火山的爆发却的却令一座城市爆发却的却令一座城市获得了永生获得了永生-庞贝无法庞贝无法躲过火山的劫难

3、躲过火山的劫难,但它被但它被掩埋封存在渐渐冷却、掩埋封存在渐渐冷却、凝固、变硬的火山灰中凝固、变硬的火山灰中,最终竟躲过了上千年岁月最终竟躲过了上千年岁月的侵蚀。的侵蚀。Pompeii an extinct volcano(死火山死火山)an active volcanotypes of volcanoesa dormant volcano(休眠火山休眠火山)Where is most possible for a volcano to erupt?Near the oceans.What do you know about volcano?Do you know how a volcano

4、erupts?How is a volcano formed?The rocks under the earth become hotter and hotter and erupt from the mountain.Boiling rock erupts from the crater(火山口火山口);the lava(熔岩熔岩)flows slowly down the mountain.gasliquidsolidlava(熔岩熔岩)vapour,carbon dioxide,nitrogen(氮氮),sulphur(硫磺硫磺)bits of rock and volcanic ash

5、,etc.Who will climb into a live volcano to take the temperature of the boiling rock inside?ImagineWould you like to be a volcanologist to observe and study volcanoes?Do you want to be a volcanologist?QuizAre you suitable for being a volcanologist?Questions Questions Yes No 1 Do you like working outs

6、ide as well as inside?2 Do you enjoy travelling to unusual places?3 Do you enjoy taking risks?4 Do you dislike doing the same thing every day?5 Do you like adventure in your life?6 Are you interested in studying rocks and other things that make up the surface of the earth?An Exciting JobWhat does a

7、volcanologist do?Is the work important?His job is to collect the information about the volcano and predict where lava will flow and how fast so that the people in the path of the lava can be warned to leave their house.Skimming Get the main idea of each paragraphPara 1Para 2Para 3Para 4Para 5The wri

8、ter expresses his love for his job and why he loves it.The writer describes his job and its importance.The writer describes his first sight of a volcano eruption.The writer describes his first closer look at a volcano eruption.The writer states again his love for his work and volcanoes.The main idea

9、 of the passagePart 1Part 2Part 3(Para 1-2)(Para 3-4)(Para 5)What the writers job is and the importance of his job.The writers experience of watching the volcano eruption.The reasons why the writer is enthusiastic about his job.Part one (Para.1-Para.2)1)Why is a volcanologists job important?2)Where

10、is Mount Kilauea?3)What does the word“alive”mean?A.Living or not dead.B.Active or lively.C.Continuing.D.Healthy.It can warn people when the volcano is going to erupt and save many lives.In Hawaii.Careful readingPart two (Para.3-Para.4)1.Why is the lava that flows on Mount Kilauea more dangerous than

11、 the actual eruption?The lava can cover up or burn villages in its path.The rocks from the volcano usually dont damage anything because no one lives near the crater.2.What made the author realize that an eruption occurred?My bed began shakingA strange soundMy bed room became as bright as dayRed hot

12、lava was fountaining hundreds of metres into the airAn absolutely fantastic sight3.What did the scientistsdo after the eruption?Put on white protective suits helmets,big bootsSlowly made our way to the edge of the craterLooked down into the red,boiling centreClimbed down into the crater to collect s

13、ome lava4.Why did the scientists have to get close tothe volcano after it began erupting?To get some lava for later study.5.Why was it difficult for the writer to walk towards the edge of the crater?The writer wore special protective suits that made it difficult to walk.Part three (Para.5)What does

14、the writer find impressive even after studying volcanoes for more than twenty years?The author is impressed by the beauty of the eruption and also by its potential to cause great damage.1 The writer doesnt mind the occasional danger of his job because _.A.He travels to unusual places and meets inter

15、esting people from all over the world.B.He likes the different ways of working.C.He thinks his job the most important.D.He is excited about dangers and feels alive.Choose the best answer:D2As a result of the volcanologists work,_.A.other scientists predict the progress of lava from the volcano.B.man

16、y people have been warned to leave their homes.C.the eruption causes less damage.D.the eruption may be prevented breaking out.A3Why did the vocalnologist run out of the house into back garden?A.Because his bed began shaking.B.Because his bedroom suddenly became as bright as day.C.Because he thought

17、there was an earthquakein Hawaii.D.Because he wanted to collect information about eruption.B4.What does the writer mean by using lucky in the sentence I was lucky enough to have a much closer look at it?A.He felt much safer on the top while the other two scientists climbed down into the crater.B.It

18、was his first sight of an eruption.C.It was the first time for him to watch the crater.D.Both B and C.D5.Yet,however weak we are,we are not completely powerless.yet在此是连词在此是连词,“但是但是,然而然而”(but,however)I have slept eight full hours,yet Im still sleepy.我睡了足足我睡了足足8个小时了个小时了,可还是想睡。可还是想睡。并列连词并列连词but 不可与从属连词不可与从属连词though/although同时出现同时出现,而而yet 作为副词作为副词,可与可与though/although 同时出现。同时出现。本节内容结束