Unit 3 The world of Science 第三课时&第四课时（ppt课件+2课时）-2022新外研版（2019）《高中英语》必修第三册.rar

Unit 3 Unit 3 The world of scienceThe world of science Period 3 Developing ideasLearning Aims:1.Make sense of the passage and catch the main idea of the passage;2.Understand the stylistic features of argumentative writing;3.Review the language points learned in the previous class and accumulate some new phrases;Part 1 Developing ideas Step 1 Activity 1 Read the short introduction to Benjamin Franklin and share any other information you know about him.Benjamin Franklin(17061790)was one of the Founding Fathers of the United States and helped draft the Declaration of Independence.Apart from being a successful statesman,he was also well known as a leading American author,printer and publisher,successful diplomat,creative scientist and inventor.publisher n.出版商出版商diplomat/dplmt/n.外交官外交官Part 1 Developing ideasStep 2Activity 2 Read the passage and find out what Franklins experiment aimed to prove.Franklins experiment aimed to prove that lightning was a form of electricity.Activity 3 Number the statements to show how peoples attitudes towards Franklins experiment have changed.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 Franklins experiment.312Think&Share1.Do you think it matters that Franklins experiment might not be true?Why?2.What is your opinion about the statement“.we should not always believe everything we read or hear even if it is a great story”?3.In what ways do scientists contribute to society?Firstly,scientific discoveries promote the development of our society.Secondly,the contributions of scientists in medicine extend our life span.Thirdly,scientists have invented a lot of surprising tools that fundamentally improve our living standards.Part 1 Developing ideasStep 3Part 1 Developing ideasStep 4Explore the passageExplore the passage-new words and phrases-new words and phrases 1.n.小说小说;虚构虚构;杜撰杜撰2.一道闪电一道闪电3.一根绳子一根绳子;一根线一根线4.一把一把金属制的金属制的钥匙钥匙5.贴（系，粘）在贴（系，粘）在.6.(电流电流)通过绳子传到钥匙上通过绳子传到钥匙上7.做某事的科学方法做某事的科学方法8.想出想出 9.不止一种记述（描述）不止一种记述（描述）10.即使即使1.fiction2.a flash of lightning 3.a piece of string4.a metal key5.be attached to6.conduct(electricity)through the string to the key7.scientific approach e up with9.more than one account10.even if背诵句子：背诵句子：1.他用一根系在风筝上的线绳把风筝升起来。他用一根系在风筝上的线绳把风筝升起来。2.不止一代的小学生对他的勇敢和寻找真理的科学方法感到惊奇。不止一代的小学生对他的勇敢和寻找真理的科学方法感到惊奇。3.然而，这个故事和实验的细节都不是完全真实的。然而，这个故事和实验的细节都不是完全真实的。4.尽管尽管Franklin的实验的发生已经被证实，但不止一位科学家质疑真实发生的的实验的发生已经被证实，但不止一位科学家质疑真实发生的事情。事情。5.但科学家们一致认为，如果但科学家们一致认为，如果Franklin真的碰了钥匙，他肯定已死于电击。真的碰了钥匙，他肯定已死于电击。6.事实上，不止一种说法表明，虽然事实上，不止一种说法表明，虽然Newton的灵感确实来自一个掉落的苹果，的灵感确实来自一个掉落的苹果，但没有证据表明它集中了他的头部。但没有证据表明它集中了他的头部。Class checkComplete the sentences with the correct form of the words in the box(one word is extra)admittedly conduct declaration flash proof scientific1 Dont try to put out an electrical fire with water,as water is very good at _ electricity and you may get hurt.2 A theory is probably not true if there is no _ to support it.3 Virtual reality technology is already quite popular,but it is _ still too expensive for most people to afford.4 At the end of a _ experiment,it is important to summarise the results.5 There was a bright _,followed by a large sound,and everyone began running out of the science building One of Dr James experiments had gone wrong again!conducting proofadmittedlyscientificflashPart 2 Conclusion1.Make sense of the passage and think critically about what Ive read and heard2.Review some language points and learn the meanings of some sentences from the passage.3.Accumulate some new words and phrases from the passage.Unit 3 Unit 3 The world of scienceThe world of science Period 4 Presenting ideasLearning Aims:1.Read an experiment report and understand the structure of an experiment report.2.Practise an experiment report with the help of the given structure.3.Improve your own writingPart 1 Writing an essayStep 1Activity 5 Read the instructions for the experiment Activity 5 Read the instructions for the experiment and answer the questions.and answer the questions.1.What do you think the results of this experiment will be?The egg will squeeze into the bottle.skwiz v.挤压挤压;榨出，榨出，挤挤出出2.What can you learn from this experiment?The experiment shows us the effects of air pressure.Air pressure indeed exists,and it is very powerful.Egg in a Bottle Experiment:Egg in a Bottle Experiment:Why does the egg get pushed inside the bottle?Why does the egg get pushed inside the bottle?Theanswerisallaboutairpressure.Ifyoufirstsettheeggonanemptybottle,theairpressureinsidethebottlematchestheairpressureoutside,sonothinghappens.Butwhenyoupoursomehotwaterintothebottle,itcausestheairinsidetoheatupandexpandrapidly,sosomeoftheairinthebottlegetsout.Whentheeggisputonthebottle,theairpressureoutsideofthebottlepushestheeggintothebottle.Theresultisanunbalancedforcetheforceoftheairpushingontheeggfromoutsidethebottleisgreaterthantheforceoftheairpushinguponitfrominsidethebottle.Asaresult,theeggispushedintothebottle.Background information【文体解读】【文体解读】实验报告是把实验目的、方法、过程、结果等记录下实验报告是把实验目的、方法、过程、结果等记录下来来,经过整理写成的书面汇总材料。实验报告要明确体经过整理写成的书面汇总材料。实验报告要明确体现实验目的、步骤和结果现实验目的、步骤和结果,对具体实验现象的描述要客对具体实验现象的描述要客观准确观准确,分析要全面具体分析要全面具体,语言要简洁质朴、通俗易懂。语言要简洁质朴、通俗易懂。write a report of the experiment.Experiment reportIntroduction The aim of the experiment.The materials used in the experiment and the explaination of the procedure.The results of the experiment and something you have learned.Main bodyConclusionPart 1 Writing an essay 话题词汇话题词汇：do/carry out/conduct an experiment 做实验做实验 aim 目的目的;目目标标 material材料材料 procedure步骤步骤 stage 阶段阶段 result 结果结果 draw/come to a conclusion 得出结论得出结论话题句式话题句式描述实验目的、材料、结果、结论描述实验目的、材料、结果、结论:Theaimoftheexperimentistofindoutthetemperatureandwhathappenswhenwaterisboiling.实验的目的是观察水沸腾的温度和现象。实验的目的是观察水沸腾的温度和现象。Todo/carryout/conducttheexperiment,youneedthefollowingmaterials:beaker,thermometer,alcohollampandmatch.为了做实验为了做实验,你需要下列材料你需要下列材料:烧杯、温度计、酒精灯和火柴。烧杯、温度计、酒精灯和火柴。Sometimelater,bubblesbegintoappearwhenthetemperaturereaches100Centigrade.一段时间之后一段时间之后,温度到达温度到达100时开始出现气泡。时开始出现气泡。Wecandrawaconclusionthatwaterboilswhenthetemperaturereaches100.我们可以得出结论我们可以得出结论:水在温度达到水在温度达到100时沸腾。时沸腾。Introduction:This experiment is designed to prove whether air pressure really exists.Main body:I prepared the materials,including a boiled egg,a glass bottle whose neck is a bit smaller than the egg,and some hot water to do this experiment.Procedure:First,I removed the shell of the egg.Then,I carefully poured some hot water into the bottle,and shook the bottle gently.After a few minutes,I poured out the hot water.Just at the same time,I quickly placed the egg on top of the bottle.Conclusion:After the experiment,I can draw the conclusion that air pressure indeed exists,and it is very powerful.It is the force of the air that pushed the egg into the bottle.Activity 6Activity 6 Complete the boxes with the information in Activity 5.Do furtherComplete the boxes with the information in Activity 5.Do furtherresearch if necessary.research if necessary.Theexperimentisdesignedtoprovewhetherairpressurereallyexists.Atthebeginningoftheexperiment,Ipreparedthematerials,includingaboiledegg,aglassbottlewhoseneckisabitsmallerthantheegg,andsomehotwater.Withallthethingsprepared,theexperimentbegan.First,Iremovedtheshelloftheegg.Then,Icarefullypouredsomehotwaterintothebottle,andshookthebottlegently.Afterafewminutes,Ipouredoutthehotwater.Justatthesametime,Iquicklyplacedtheeggontopofthebottle.Tomyamazement,theeggsqueezedintothebottleatonce.Aftertheexperiment,Icandrawtheconclusionthatairpressureindeedexists,anditisverypowerful.Itistheforceoftheairthatpushedtheeggintothebottle.Recite sentences:1.这个实验是设计来证明大气压强是否真的存在。这个实验是设计来证明大气压强是否真的存在。Theexperimentisdesignedtoprovewhetherairpressurereallyexists.2.所有东西都准备好，实验就开始了。所有东西都准备好，实验就开始了。Withallthethingsprepared,theexperimentbegan.3.然后，我小心地倒了些热水进瓶子里，并轻轻摇晃瓶子。然后，我小心地倒了些热水进瓶子里，并轻轻摇晃瓶子。Then,Icarefullypouredsomehotwaterintothebottle,andshookthebottlegently.4.令我吃惊的是，鸡蛋立刻挤进瓶子里。令我吃惊的是，鸡蛋立刻挤进瓶子里。Tomyamazement,theeggsqueezedintothebottleatonce.5.实验过后，我可以得出结论：大气压强确实存在并且压强很大。就是压强实验过后，我可以得出结论：大气压强确实存在并且压强很大。就是压强的力量把鸡蛋推进瓶子里的。的力量把鸡蛋推进瓶子里的。Aftertheexperiment,Icandrawtheconclusionthatairpressureindeedexists,anditisverypowerful.Itistheforceoftheairthatpushedtheeggintothebottle.HomeworkChoose one object and write a short passage to describe how it has changed Choose one object and write a short passage to describe how it has changed and predict how it will further change over the next 50 years.and predict how it will further change over the next 50 years.Conclusion:1.Learn the structure and the write procedure of an experiment report.2.Learn how to write an experiment report3.Recite some new words,phrases and sentences.