Unit 3 Developing ideas ppt课件-（2019）新外研版高中英语高一下学期必修第三册(1).pptx

1、教学教材：外研版高中英语新教材必修第三册教学教材：外研版高中英语新教材必修第三册教学内容：教学内容：Unit 3 The world of ScienceUnit 3 The world of Science第五课时：第五课时：Developing ideas:Developing ideas: Franklins experiment:how Franklins experiment:how much is true?much is true?Before readingWho is he?Benjamin FranklinWhat made him famous?Founding Fath

2、ers of the USDeclaration of Independenceleading author, printer, publisher, diplomat, scientist and inventor.Before readingRead the short introduction to Benjamin Franklin.As a scientist, he was a major figure in the American Enlightenment（启蒙） and the history of physics for his discoveries and theor

3、ies regarding electricity. As an inventor, he was known for the lightning rod（避雷针）, and the Franklin stove. He founded many civic（市政的） organizations, including the Library Company, Philadelphias first fire department and the University of Pennsylvania. Before readingWhat can you infer from the essay

4、 title? The essay title is explicit, making it clear that the story about Franklins experiment may be fictional. Title:Franklins Experiment: How Much Is True?FactsFictionVSBefore reading1. An egg can bear at least 10kg.2. Watt invented the steam engine inspired by the jumping lid of a boiling kettle

5、.3. Cut an earthworm into two, and you can get two living earthworms.4. Franklins kite-in-a-thunderstorm experimentFictionNow read the essay and Now read the essay and check your prediction.check your prediction.While readingTask1Read the para 1-2 and find out what Franklins experiment aimed to prov

6、e(1m)P32 2Franklins experiment aimed to prove if lightning was really produced by electricity or something else. Task2Read the para 2 and Fill in the experiment report (2m)ExperimentThe kite lightning experimentAimMaterialProcedureConclusionTo test if lightning was really produced by electricity.A k

7、ite with a string and a metal keyFirst, Franklin flew a kite with a string and a metal key. Then, when a flash of lightning hit the kite, electricity was conducted through the string to the key. Finally, touching the key, Franklin got an electric shock. Lightning was a form of electricity.Task3Read

8、the para 3-6 and number the statements to show how peoples attitudes towards Franklins experiment have changed.(3m) Franklins spirit of scientific exploration is still considered an inspiration. People are amazed at and inspired by Franklins experiment. Scientists question what really happened in Fr

9、anklins experiment.312Q1:Whats the meaning of“if Franklin had actually touched the key, he would certainly have died from the electric shock.”Q2: Thus how much is true in this experiment? He didnt touch the key.Flying the kite and the kite was hit by a lightning may have happened, but Franklin didnt

10、 touch the key.Look through the passage and answer the question.Task4The title contains a question being answered in the essay.IntroductionWhat is the experiment?Peoples attitudes have changed over years.ConclusionThe answer of the question in titleThe authors opinionLearn to analyze an essay. 1Whil

11、e reading1. He raised the kite with a piece of string tied to it. With a lot work to do, I have no time to work with you. （未来）（未来）We found the house easily with the little boy leading the way.（主动）（主动）With all the things she needed bought, she went home happily.（被动）（被动）with 复合结构：复合结构： with+宾语宾语+宾补（宾补

12、（adj./adv./介词短语介词短语/-ing/-ed/to do）with宾语宾语宾语补足语宾语补足语Sentence analyzing for better understanding2post reading富兰克林和许多其他科学家一起启发并告富兰克林和许多其他科学家一起启发并告诉我们，科学实验对于确立真理和为后来诉我们，科学实验对于确立真理和为后来的科学发现和发明做出贡献是很重要的。的科学发现和发明做出贡献是很重要的。2. Franklin, along with many other scientists, has inspired us and taught us that s

13、cientific experiments are important in order to establish the truth and to contribute towards later scientific discoveries and inventions.宾语从句宾语从句along with Jim, along with his classmates, has seen the film. My father, along with I, is a base-ball fan. 当连接两个主语时，当连接两个主语时，谓语动词单复数应谓语动词单复数应与前面主语一致。与前面主语

14、一致。并列主语、插入语并列主语、插入语post reading但是科学家们一致认为如果富兰克林真的碰但是科学家们一致认为如果富兰克林真的碰到钥匙的话，他一定会死于触电。到钥匙的话，他一定会死于触电。3. But scientists all agree that if Franklin had actually touched the key, he would certainly have died from the electric shock.If 引导虚拟条件状语从句，与过去事实相反，引导虚拟条件状语从句，与过去事实相反，从句用过去完成时，主句用从句用过去完成时，主句用would/co

15、uld/might/ should have done.If you (follow)my advice yesterday, you would not (make) such a mistake. had followedhave made宾语从句宾语从句post reading1. 我在房间坐了一会儿，眼睛盯着天花板。我在房间坐了一会儿，眼睛盯着天花板。(with 复合结构复合结构)I sat in my room for a few minutes with my eyes fixed on the ceiling.2. 假如他昨天来这儿的话，就会看见他的老朋友。假如他昨天来这儿的话，

16、就会看见他的老朋友。（If对过去的虚拟语气）对过去的虚拟语气）If he had come here yesterday, he would have seen his old friend.post readingFranklins experiment:How much is true?whatpeoples attitudeproceduresaimconclusionmaterialamazed &inspired doubtful Critical thinking 3Retell the essay with the help of graphic organizer.post r

17、eadingconclusion A sample for retelling In order to find out whether lightning was really produced by electricity or something else, Benjamin Franklin made a kite-in-a thunderstorm experiment. He raised a kite into the sky with a metal key attached to its string. After a flash of lightning hit the k

18、ite, Franklin then touched metal key and got an electric shock. The experiment proved that lightning was a form of electricity. More than one generation of schoolchildren have been amazed and inspired by by Frenklins spirit and bravery for scientific exploration. However, with time going by, the det

19、ails about the experiment were questioned. If Franklin had actually touched the key, he would certainly have died from the electric shock. Actually, people have been more inspired by Franklins spirit of scientific exploration than by facts themselves. In conclusion, we should not always believe ever

20、ything we read or hear-even if it is a great story. Think and Share (2m) 1. Do you think it matters that Franklins experiment might not be true? Why?2. What qualities do you think a great scientist should have?3. What is your opinion about the statement “ we should not always believe everything we r

21、ead or hear-even if it is a great story”?Think and Share 1. Do you think it matters that Franklins experiment might not be true? Why? No. Although it might not be true, we are still inspired by his spirit of scientific exploration.2. What qualities do you think a great scientist should have? brave,

22、hard-working, creative, and imaginative.Think and Share One day Isaac was reading a book under an apple tree on the farm. An apple fell out of the tree - bonk! Ow! Now, for most people that would be the end of the story, but not for Isaac. Not for somebody who just couldnt stop asking why all the ti

23、me. Why did the apple fall out of the tree? Does everything fall? What makes things fall? Can anything stop things from falling? Are the sun, moon, and stars falling? Why dont they ever hit the ground? So many questions. Newton spent many years answering these questions by thinking and doing experim

24、ents. He made up the law of gravity. According to this law everything pulled everything else to itself by a force called gravity. How strong that force is depends on how heavy the things are and how close together. So even two apples pull toward each other. But, the force is so small that you need a

25、 very careful experiment to measure it. The reason that things fall toward the ground is that the earth we live on is so very heavy, and we are so close to it. Newtons law of gravity not only explained how things fall on earth, but how planets move around the sun and how moons move around planets. I

26、ssac Newton and Apple Trees (3m) Home workBackground：No finer engine of misinformation has ever exceeded the World Wide Web. One need only to type the word Edison into any search engine to find web sites, blogs, and writings which declare that Edison, recognized in his own time as the greatest inven

27、tor, stole all of his ideas and that the chief victim of his thievery was Nikola Tesla (1856-1943). There is even an online debate in progress that considers the proposition: Nikola Tesla should be taught about in schools for his inventions instead of the people who stole his ideas like Edison.1、Sur

28、f the internet for the stories between Edison & Tesla, the two greatest inventors in the history of the development of electric power and think about “How much the story is true?” 2、Share the stories you collected next period. Its easy to read, but its hard to think, but without one, its useless. Benjamin FranklinThank you