【课件】Unit+3Reading+and+Thinking+课件人教版选择性必修第三册+.pptx

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1、Unit 3 Environmental ProtectionReading and Thinking点击添加内容1.What can you see in the picture?2.What is the cause of this phenomenon?A large piece of ice breaking off a large glacier or ice sheet.Global warmingWhat other consequences may global warming bring about?Global warminganimals dyingthe rise of

2、 sea levelunpredictable future of humancoastal cities submerged economic lossesextreme weathernatural disastersWhat do you know about global warming?What is the graph about?What information can you get from it?What might be the story behind the photo?Whats the passage about according to the title,th

3、e graph and the photo?Whats the genre of the passage?PredictionThe graph shows the change in the Global Surface Temperature between 1920 and 2016.It shows the temperature anomaly(反反常常现现象象),which shows how much the temperature has risen above what it would usually be at a base level.starve to deathsk

4、in and bones Global warmingWhats the genre of the essay?What aspects are included in such an essay?Expository text(说明文)Because in the expository text,the authors sometimes use some graphs or diagrams in their essays in order to convince their readers.These graphs and diagrams often come from scienti

5、fic research reports and other reliable resources.Find out the topic sentence of each paragraph.phenomenon/evidenceconsequencesolutionscauses1.What is the evidence of global warming?2.Why did the author write about the polar bear?3.Why is the“natural”greenhouse effect important and necessary?4.What

6、are the consequences of the global temperature rise?5.Why did the author mention the climate scientists warning?6.What can be done to solve the global warming?7.What is the authors purpose of writing the text?Read the text and answer the following questionsIn which paragraph can you find the answers

7、?Para.1&2Para.2Para.3Para.4Para.4Para.51.What is the evidence of global warming?2.Why did the author write about the polar bear?Part 1 phenomenon /evidence3.Why is the“natural”greenhouse effect important and necessary?4.What are the consequence of high greenhouse gas emissions?Part 2 causenaturalman

8、-madeDefinitionHeat from the sun enters the _ and warms Earths _ as _-wave radiation.FunctionKeeping Earths warm and_ DefinitionPeople produce huge amounts of_ greenhouse gases by burning_.A big problemMore _ energy is trapped in the atmosphere and causes Earths surface tempreature to _ quickly.habi

9、tableextra fossil fuelsatmospheresurfaceshortheatriseGreenhouse EffecGreenhouse Effect t3.Why is the“natural”greenhouse effect important and necessary?Part 2 causeRead paragraph 3 and create a diagram describing how the greenhouse effect works.Heat released back into spaceHeat reflected back to Eart

10、hs surfaceReflected sunlightAtmosphere Sunlight Draw a diagramDraw a diagramDraw a diagramDraw a diagramDiagrams are very useful tools that can be used to brainstorm ideas,map out processes,show cause and effect relationships,explain a new idea or concept,and so on.When you read an essay about scien

11、tific issues,you can try drawing a diagram,which will not only allow you to visualise the problems more clearly but also can help demonstrate your creative thinking and problem-solving.A diagram describing how the greenhouse effect worksThe rise in the temperatureextreme weather&natural disastersser

12、ious damage,costing human livesextreme rainstorms,heatwavesled toresultsexamplesBecause global warming needs everyones attention and it is essential that we take appropriate actions.Part 3 consequence4.What are the consequences of the global temperature rise?5.Why did the author mention the climate

13、scientists warning?solutionsgovernmentsmake policiestake appropriate actions and measuresindividualsreduce our“carbon footprint”byeducate everyone about global warmingPart 3 solution6.What can be done to solve the global warming?DiscussionWhat will you do to help?turn electrical appliances off when

14、not using themwalk or ride a bike,dont driverecycle cans,bottles,plastic bags and newspapersbuy things made from recycled materialsplant more treestalk with family and friends about global warming点击添加内容What writing techniques does the author use in the passage?Read for language features点击添加内容a graph

15、a photoThe“natural greenhouse effect”refers to Without this process,earth could not sustain life.However,the“man-made greenhouse effect”has now become a big problem definition,explanation,comparisonAn expert who has studied polar bears said thatAccording to the scientists who found Experts claim tha

16、tClimate scientists have warned that if wescientists and experts quotes点击添加内容So what will you do to help?raise a question at the end of the article for readers to think aboutGovernments need to consider making policies and taking appropriate actions and measures We as individuals can also reduce our

17、“carbon footprint”by.examplesWriting purposes:To inform readers of global warming,convince and inspire them to do whatever they can do to deal with this problem.An Expository EssayStructure PhenomenonCauseConsequenceSolutions Language featuresGraphs,photosDefinition ExamplesComparisonQuotation Questions and answersHomework Collect expressions on global warming,the following parts included:phenomenon,cause,consequence and solutions.Summary writing