九年級英語全冊 Unit 8 Discoveries Lesson 22 Famous Discoveries課件 （新版）北師大版

1、Unit 8 Lesson 22Famous DiscoveriesHave you seen this picture? Whats this?Warm-upNASA 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 habi

2、table zone of a G star similar to our sun.7月23日，美國國家航空航天局(簡稱為NASA)宣布發(fā)現(xiàn)開普勒-452b，是迄今為止與地球最為相近的行星。該行星距離地球1400光年，NASA將其命名為“地球2.0”，因為它是第一顆人類在宜居帶里與太陽相似的恒星附近發(fā)現(xiàn)的行星。 1.與太陽相似的恒星被發(fā)現(xiàn) 這顆系外行星編號Kepler 452b，其直徑約為地球的1.6倍，與恒星之間的距離與日-地距離相近。恒星Kepler 452距離地球大約430秒差距(約合1400光年)，位于天鵝座。天文學(xué)家稱，這是至今為止發(fā)現(xiàn)的最接近地球的“孿生星球”，跟地球的相似指數(shù)為0

3、.98，并且有可能擁有大氣層和流動水。NASA說這個星球上可能有活火山，有存在生命的可能性，行星應(yīng)該有60億年歷史，地球為45億年。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

4、that the galaxy, EGS-zs8-1, formed more than 13 billion years ago at a time when the universe was only five percent of its present age.科學(xué)家使用位于夏威夷的凱克天文臺的望遠鏡發(fā)現(xiàn)了新星系，并將這個星系命名為EGS-zs8-1。它是迄今發(fā)現(xiàn)的最遙遠星系，打破了此前的觀測紀錄。2.宇宙中最遙遠星系被發(fā)現(xiàn)What are the people doing in the following pictures? What do you think they are tr

5、ying 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: Discoveries chemistry, do experiments, electricity, health, lab, machine, observe, physics, research, space, technologyListen and practice.1.Do you know any other sci

6、entific 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 has become the first Chinese woman to win a Nobel Prize(2015),

7、 for her work in helping to create an anti-malaria (ntimleri 抗瘧疾的 ) medicine.屠呦呦 (1930-)藥學(xué)家抗瘧疾:青蒿素和雙氫青蒿素Readingand 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 physics（身體）. It can go right through some t

8、hings like skin(皮膚） 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.ABCRead and find the name of the picture A,B and C and make sure whether your match is right or not.X-rayDNAantibioticsThe first antibiotic: P

9、enicillin 青霉素，盤尼西林 It can wipe out the infection消除感染Alexander Fleming亞歷山大弗萊明EventYear The structure of DNA was discovered.Wilhelm Roentgen received the Nobel Prize.Scientists discovered DNA.1953When did these things happen? Write the correct years.19011869DNA structuredouble coiled spiral structure

10、(雙線圈螺旋結(jié)構(gòu)）Crick Watson克里克 沃森Wilhelm Roentgen X-ray1845-1923Germany威廉倫琴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 more disease.Doctors treat broken bones easily with X-rays

11、 machines. Three discoveriesDNA(Crick & Watson)X-rays(Wilhelm Roentgen)1. the building block of life 2. pass on certain characteristics3. be able to treat more diseaseDoctors treat broken bones easily with X-rays machines. The text is about A lot of diseases can be cured easily with it.Antibioti

12、cs(Fleming) effectCan you answer these questions?Finish them on the worksheet.1. What can cure a lot of diseases easily?What passed on certain characteristics from parents to children?3. What can scientists know from the map of our DNA?4. Who was the first to study and name X-ray?5. What prize did t

13、he 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 map of our DNA?DNA.It tells them a great deal a

14、bout 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. cure vt. 治愈； 矯正； 解決； 消除He needed surgery to cure a troublesome back injury.2. block n. 塊； 街區(qū)； 障礙物，阻礙She walked four blo

15、cks down High Street.There is a block of ice.Language points3. pass on 傳遞； 去世； 前進； 對發(fā)表（意見）He has written a note asking me to pass on his thanks. 4. treat v. 對待； 治療； 處理； 款待Doctors treated her with aspirin.If Marys hand is cut by a knife for 3days, what will she do?If your leg gets hurt in P.E, what s

16、hould you do?If you have a headache, what can you do? “Doctor, can you explain what antibiotic is for me?” asks one patient.If youre a doctor, Please treat! (Pair Work)ProblemsPair workWhich discovery do you think is the most important according to the text?Example: A: I think X-rays are the most important discovery.B: Why?A: Because with X-ra