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1、1,Words study,Global warming,Unit 4,Pre-reading&reading I,Do you know anything that consume(消耗)energyin the home and the class?Do you know any kind of energy resource?,Warming up,lights,television,computer,washing machine,hairdryer,camera,wind,coal,oil,nuclear power,solar power,water,4,renewable 可再生
2、的,renewable,renewable,non-renewable 不可再生的,non-renewable,non-renewable,What is the greenhouse made and used for?,Greenhouse,A greenhouse is made of glass and is used for growing plants,especially during cold weather.,Greenhouse Effect温室效应,8,trap the heat from the sun,keep it from escaping,warm,A gree
3、nhouse,How does it work?,9,How does this global warming come about?,Man burns fossil _-produce huge quantities of greenhouse gases,esp._-the gases trap h_ from the sun and therefore w_ the earth.,fuels,carbon dioxide,heat,warm,Greenhouse,Greenhouse Effect,Greenhouse gases,Global warming,reasons,A ri
4、sing population,The use of energy,Greenhouse gases,Burning of fossil fuels(coal,oil and natural gas),Agricultural industry,Destruction of forests,11,Skim the article:,What are the names of the three scientists mentioned in the article?,Who wrote the article?,What is the name of the magazine?,Fast Re
5、ading,12,What is the writing style?A.Expositive(说明文)B.Practical(应用文)C.Argumentative(议论文)D.Narrative(记叙文),The organization of an expositive essay:,Introduction,A title,Body,Conclusion,Para.1,Para.2-6,Para.7,13,Look through the main text:,Para.1,Para.2-5,I,II,Para.6,III,Para.7,IV,Introduction,Body,Con
6、clusion,14,Match the parts with the main ideas:,Explain how global warming comes about.,List two different attitudes among scientists towards global warming.,Introduce the topic of global warming.,Its up to readers to think and decide whether people should do something about global warming or not.,P
7、art 1,Part 2,Part 4,Part 3,15,Match the parts with the writing skills:,Using a question,leavingreaders to think over the issue,Raising a question,Giving examples,making contrast(comparison),Giving examples,using graphs,explanation,Part 1,Part4,Part3,Part 2,16,evidence,evidence or argument?,Read the
8、2 graphs:,Detailed reading,17,The 1st graph shows the globalt between 1860 and.The temperature i and decreased over this period but on the whole it i by around one degree Fahrenheit.During this time,the earth reached its l temperature in about 1910 and its highest in.There was a steady increase in t
9、he temperature during the 20 years after 1980.We can see from the graph that the earth has become w since early last century.,emperature,2000,ncreased,ncreased,owest,2000,armer,Detailed reading,Read something more about the 2 graphs:,18,The 2nd graph shows the amount of c d in the atmosphere from to
10、 1997.The CO2 c steadily i over this forty-year period.It went up from 315 to parts p million.,arbon,ioxide,1957,ontent,ncreased,370,er,Tip:While reading a graph,youd better pay attention to the numbers.,Detailed reading,19,True or false?(P2),Reading Comprehension,2,1.The temperature in the last cen
11、tury didnt see m to increase much.2.Everyone believes that global warming is caused by the activities of humans.3.Janice Foster believes she can measure the future global rise in temperature.4.The rise in carbon dioxide is causing a steady increase in global warming.5.George Hambley believes that gl
12、obal warming will do good rather than harm to the earth.6.It is clear what the effects of global warming will be.,20,What do the 3 scientists think about global warming?Do they agree with one another?,Read the article carefully.,They dont agree with one another.,Detailed reading,3.What do they think
13、 about global warming?Do they agree with one another?They dont agree with each other.Dr.Janice Foster thinks the effects of global warming could be very serious.,George Hambley thinks global warming will be mild with few bad environmental consequences.Charles Keeling believes it is the burning of mo
14、re and more fossil fuels that is resulting in a big increase in carbon dioxide.,Using languageWhat can we do about global warming?,Turn a(n)_off when youre not using it.Put on more clothes instead of turning up the_Walk or_instead of taking motor vehicles._cans,bottles,plastics and newspapers.Buy th
15、ings made from_.Buy products that are economical with _._in your garden or your school yard.Talk with your family and friends about_.,electrical appliance,heat,ride a bike,Recycle,recycledmaterials,energy,Plant trees,globalwarming,25,The earth is becoming warmer.In your opinion,does it matter?,Discussion:,A:We shall do something about global warming.,B:We shall do nothing about global warming.,Your reasons,26,Assignment,Talk about the effects of global warming.Think about what individuals should do.Call on people to protect the earth and design a slogan(口号）.,Everyone can make a difference,
