北师大版九年级全一册英语课件《Unit81Lesson22Getting ready .ppt

1、Getting ready&ReadingLesson 22Lead-inHave you seen this picture?Whats this?NASA on 23rd,July announced the discovery of Kepler-452b,the most Earth-like planet ever found.Located 1,400 light-years from our planet,NASA called it“Earth 2.0”,because its the first planet discovered in the habitable zone

2、of a G star similar to our sun.7月23日，美国国家航空航天局(简称为NASA)宣布发现开普勒-452b，是迄今为止与地球最为相近的行星。该行星距离地球1400光年，NASA将其命名为“地球2.0”，因为它是第一颗人类在宜居带里与太阳相似的恒星附近发现的行星。1.与太阳相似的恒星被发现这颗系外行星编号Kepler 452b，其直径约为地球的1.6倍，与恒星之间的距离与日-地距离相近。恒星Kepler 452距离地球大约430秒差距(约合1400光年)，位于天鹅座。天文学家称，这是至今为止发现的最接近地球的“孪生星球”，跟地球的相似指数为0.98，并且有可能拥有大气

3、层和流动水。NASA说这个星球上可能有活火山，有存在生命的可能性，行星应该有60亿年历史，地球为45亿年。An international team of scientists said they have discovered the farthest galaxy ever measured in the universe.By using a powerful instrument called MOSFIRE on the Keck I telescope at the Keck Observatory in Hawaii,the team thought that the galax

4、y,EGS-zs8-1,formed more than 13 billion years ago at a time when the universe was only five percent of its present age.科学家使用位于夏威夷的凯克天文台的望远镜发现了新星系，并将这个星系命名为EGS-zs8-1。它是迄今发现的最遥远星系，打破了此前的观测纪录。2.宇宙中最遥远星系被发现1.What are the people doing in the pictures?2.What do you think they are trying to discover?1.What

5、 are the people doing in the following pictures?2.What do you think they are trying to discover?Example:I think the person in Photo A is observing the stars.Maybe he is trying to discover a new star.Key Words:Discoverieschemistry,do experiments,electricity,health,lab,machine,observe,physics,research

6、,space,technologyListen and practice.1.Do you know any other scientific discoveries?2.Can you name some famous ones?3.Among these discoveries,which do you think are the most important ones?Look at your worksheet after class.PPT(2632)Do you know any of them?Whats their major achievements?Tu Youyou ha

7、s become the first Chinese woman to win a Nobel Prize(2015),for her work in helping to create an anti-malaria(ntimleri 抗疟疾的)medicine.屠呦呦(1930-)药学家抗疟疾:青蒿素和双氢青蒿素and match2.Many children died very young because of different diseases.Now it can be cured(治愈)easily with it.Look!Guess1.Its a discovery in p

8、hysics（身体）.It can go right through some things like skin(皮肤）and wood but stop by bones or metal.3.Its the building block of life and we know a great deal about what we get from our parents from it.ABC1st reading:Read and find the name of the picture A,B and C and make sure whether your match is righ

9、t or not.X-rayDNAantibioticsThe first antibiotic:Penicillin 青霉素，盘尼西林 It can wipe out the infection消除感染Alexander Fleming亚历山大弗莱明EventYear The structure of DNA was discovered.Wilhelm Roentgen received the Nobel Prize.Scientists discovered DNA.19533 When did these things happen?Write the correct years.1

10、90118692nd readingDNA structuredouble coiled spiral structure(双线圈螺旋结构）Crick Watson克里克沃森Wilhelm Roentgen X-ray1845-1923Germany威廉伦琴What effect do these discoveries have?discoveries effectAntibioticsDNAX-raysA lot of diseases can be cured easily with it.pass on certain characteristics,be able to treat

11、more disease.Doctors treat broken bones easily with X-rays machines.3rd readingThree discoveriesDNA(Crick&Watson)X-rays(Wilhelm Roentgen)1.the building block of life2.pass on certain characteristics3.be able to treat more diseaseDoctors treat broken bones easily with X-rays machines.The text is abou

12、tA lot of diseases can be cured easily with it.Antibiotics(Fleming)effectCan you answer these questions?Finish them on the worksheet.1.What can cure a lot of diseases easily?2.What passed on certain characteristics from parents to children?3.What can scientists know from the map of our DNA?4.Who was

13、 the first to study and name X-ray?5.What prize did the discoverer of X-ray award?Answer the following questionsAntibiotics,X-rays.(DNA,maybe in the future.)1.What can cure a lot of diseases easily?2.What passed on certain characteristics from parents to children?3.What can scientists know from the

14、map of our DNA?DNA.It tells them a great deal about what getfrom our parents.4.Who was the first to study and name X-ray?5.What prize did the discoverer of X-ray award?Wilhelm Roentgen.The first-ever Nobel Prize in Physics.1.If Marys hand is cut by a knife for 3days,what will she do?2.If your leg ge

15、ts hurt in P.E,what should you do?3.If you have a headache,what can you do?4.“Doctor,can you explain what antibiotic is for me?”asks one patient.5.Activity 1:If youre a doctor,Please treat!(Pair Work)ProblemsWhich discovery do you think is the most important according to the text?Group Work Group Wo

16、rk Example:A:I think X-rays are the most important discovery.B:Why?A:Because with X-rays,doctors can help fix broken bones more easily.Activity 2:Homework1.Finish Ex 1 on P99.2.If you live in school or travel around for more than 10 days,what will you take in your medicine bag（急救包）?Discuss with your

17、 partner,and write down on the worksheet.Name:NicolausCopernicus哥白尼Achievement:heliocentrictheory日心说14731543 PolandName:Galileo 伽利略Achievement:Principle of inertia 惯性原理15641642ItalyNewton牛顿law of gravitation万有引力定律16431727 BritainMichael Faraday 迈克尔法拉第Electromagnetic induction 电磁感应17911867 BritainWilliam Harvery威廉哈维Blood circulation血液循环1578-1657 BritainRobert Koch 罗伯特科赫Pathogenic bacteria(病原细菌)1843-1910 GermanyWilhelm Konrad Rontgen威廉康拉德.伦琴X-rays(X射线)1845-1923Germany