外研版高一英语必修4module6课件.ppt

Listening and vocabularyGuess the Chinese meaning of the words according to the pictures.Volcanic eruptioncraterdust cloudnutsgalaxymeteoriteseedsSome words related to dinosaursComplete the sentences with the wordsbelow.adapt,climate,disappear,extinct,evolve,survive1.The _of a country is the type of weather it has.climate2.If an animal or plant is _,it existed a long time ago but doesnt exist now.3.When things _,they no longer happen or exist.4.When people or animals _,they dont die after an accident or an illness.extinctdisappear survive5.If you can_ to something,you can change in order to make the situation better.6.When animals or plants _,they change and develop over a long period of time.adaptevolveDiscussion1.How much do you know about dinosaurs?2.Have you ever seen any films or read any books about dinosaurs?What interests you most?3.In your opinion,why dinosaurs disappeared from the earth?Give your reasons.Open answersWork in pairs and answer the questions about dinosaurs.(Listen and check)1.Dinosaurs ruled the earth for about _million years.A.two B.twenty C.two hundred2.They ate _.A.plants B.meat C.both plant and meat3.They became extinct _years ago.A.600,000 B.6 million C.66 million4.Their nearest relatives today are _.A.birds B.fish C.mammalsTapescriptGood afternoon,and welcome to this weeks edition of Mysteries of Nature.Todays topic is a big one-its dinosaurs,those strange creatures which ruled the earth for no less than two hundred million years,some of them were plant eaters,others were like the infamousTyrannosaurus Rex,carnivores who lived off meant and who attacked the more peaceful plant eating dinosaurs.Not all dinosaurs were bigsome were the size of chickens,and in fact the closest things to dinosaurs living today are actually birds.But the mystery we are going to talk about today is why the dinosaurs suddenly disappeared exactly 66 million years ago,and to throw light on the subject weve invited one of the worlds foremost experts on the subject,from the Pitt Rivers Museum in Oxford,Dr Roger Binfield.Listen to the second part of the tape and discuss how many explanations are given for the disappearance of the dinosaurs?Five.1.A meteorite hit the earth.2.They stopped evolving.3.They killed each other.4.A volcanic eruption.5.Cancer caused by radiation.Listen to the tape again and decidewhich statements are true.1.A huge meteorite may have hit all the 2.dinosaurs.2.Perhaps a dust cloud made the world dark.3.A meteorite caused a volcanic eruption.4.The dinosaurs had to eat seeds and nuts to survive.5.Perhaps too much fighting caused the dinosaurs to die out.6.One scientist believed the dinosaurs became ill when they ate the wrong food.7.There may be dinosaurs today living in other galaxies.8.Dr Binfield thinks the crater near Mexico was caused by a meteorite.A discussion after listening Which theory do you think is most likely,and why?Students answersTapescript(PRES=Presenter,DR=Dr BinfieldPRES:Good afternoon,Dr Binfield,and welcome to the pragramme.DR:Thank you.PRES:Im going to come straight to the point,even if I think theres not going to be an easy answer.Why did the dinosaurs suddenly disappear,almost overnight,66 million years ago?DR:Youre right.Theres no easy answer to that question,but there are lots of theories.PRES:Such as?DR:Well,probably the most widely accepted theory is the meteorite onePRES:You mean the earth was hit by a meteorite from space?DR:Yes,thats right.PRES:And the dinosaurs died immediately?DR:Not exactly,not all of them.The meteorite may have hit the earth with the such force that it created a huge dust cloud,which stopped the sunlight from getting through so there was no light,no heat,and no food.PRES:But other animals survived?DR:Yes,smaller creatures like mammals,which may have survived because they are nuts and seeds.PRES:What other theories are there?DR:Lots.The dinosaurs may have stopped evolving,and been unable to adapt to changes in the climate.Or they might have Killed each otherPRES:Is that possible?DR:Oh yes.They spent a lot of time in fighting.There again,it might have been volcanic eruptions,not a meteorite,which sent up clouds of dust and cut off the light.One very recent theory says they died of cancer.PRES:Cancer?You mean the dinosaurs died out because they fill ill?DR:Yes.As a result of radiation coming from a dying star somewhere in our galaxyPRES:That sounds fantastic.DR:Well,I think its unlikely,but its not impossible.PRES:Which theory do you believe?DR:Id go for the meteorite.I think its the most likely one.And in the Caribbean sea,off the coast of Mexico,where the meteorite may have landedLanguage points of the listening practice1.live off:靠挣钱,过日子 2.Mom used to live off the interest from3.her savings.2.Rick disapproves of people who are living off the welfare.妈妈过去靠存款的利息过日子。里克不赞成靠福利救济过日子的人。2.go for:攻击,争取,喜欢,对适应,卖得价钱1)The presidential candidates went for each other in the papers.2)What he said about you goes for me too.总统候选人在报纸上互相攻击。他关于你的一番话也适应于我。4)Annie tends to go for older men.5)How much did that car go for?那辆车卖了多少钱?安妮喜欢年龄较大的男人。3)Jackson is going for his second gold medal here.杰克逊正在争取他在这儿的第二块金牌。Look at the words and phrases below and choose the best explanation.1.If something is back in the news it is _.2.A.in the news again.3.B.not an important news story2.If you throw light on something you _.A.switch on alight B.make it easier to understand3.If you come straight to the point you _.A.say what you want to say B.attack someone4.If something happens almost overnight it happens_.A.quickly B.in the dark5.Die out is used to speak about _.A.one person or animal B.a whole species6.Id go for the meteorite means _.A.choose B.forget7.Thats quite something refers to something _.A.ordinary B.extraordinary