选修6-unit4-Global-Warming演示课件.ppt

,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,Unit 4,Global Warming,1,2,How did,come about,?,the snow,catastrophe,Some scientists believed that,global warming,was one of the major reasons why such,extreme,climate,like severe storms and heavy snow frequently came about.,孙广勇,造成极端天气频繁的一个重要原因就是全球变暖。,3,1.Read the text carefully and sum up the main idea of each part.,2.Read the text fast,and answer the questions,on page 27 Ex1,4,Part one:,(para1),Introduce a topic /raise a question,Part two:,(para2-5),Explain how global warming comes about.,Part three:,(para6),List two different attitudes,Part four:,(para7),Draw a conclusion.,The earth is becoming warmer.,Should we do anything?,5,Fast Reading,Read the text fast,and answer the questions on page 27 Ex1,6,Who wrote the magazine article?What is the name of the magazine?,Sophie Armstrong,wrote the magazine article.The name of the magazine is,Earth Care,.,7,What are the names of the three scientists mentioned in the article?,They are Dr.Janice Foster,Charles Keeling and George Hambley.,8,3.What do they think 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,.,9,4.What are the two graphs about?,Graph 1 shows,the temperature increase,of one degree Fahrenheit between 1860 to 2000.,Graph 2 shows,the carbon dioxide content,in the atmosphere from 1957 to 1997.,Graph 1:,Graph 2:,10,What is,the main topic,of the,article?,Global warming,11,Page 27 Ex.2,T,or,F,1.The temperature in the last century didnt seem to increase much.,2.Everyone believes that global warming is caused by the activities of humans.,3.Janice Foster believes that she can measure the future global rise in temperatrue,4.The rise in carbon dioxide is causing a steady in crease in global warming.,5.George Hambley believes scientists are just guessing about the effects of global warming.,6.It is clear what the effects of global warming will be.,T,T,T,T,F,F,12,1.The temperature in the last century didnt seem to increase much.,2.Everyone believes that global warming is caused by the activities of humans.,3.Janice Foster believes that she can measure the future global rise in temperatrue,T,T,F,Line,2,:it is a rapid increase compared to most natural changes,Line,5,:There is doubt that,13,4.The rise in carbon dioxide is causing a steady in crease in global warming.,5.George Hambley believes scientists are just guessing about the effects of global warming.,T,T,6.It is clear what the effects of global warming will be.,Line 45:No one knows,14,Summary,The earth is becoming warming and all scientists _ _ the view that the increase in the earths temperature,is due to,the burning of _,_.Some _ of this process are called _,the most important one of which is _.We need these gases,but the problem begins when we add huge _ extra carbon dioxide into the atmosphere.It means that more heat energy _ to be trapped in the atmosphere causing the global temperature to _.,A scientist called Charles Keeling found that the carbon dioxide in the atmosphere went up from around,subscribe to,fuels,greenhouse gases,byproducts,carbon dioxide,quantities of,tends,go up,fossil,15,315 parts to around 370 parts _ million in 40 years.All scientists accept the date and agree the burning of more and more fossil fuels has _ this increase.,However,the attitude of scientists towards this rise is completely different.On the one hand,Dr.Foster thinks that the _ which increases the temperature by 5 degrees would be a _.On the other hand,George Hambley,who _ this view,believe that we should not worry about high levels of carbon dioxide in the air.They predict that any warming will be _ with few bad environmental _.But no one really knows the effects of global warming.,per,resulted in,trend,catastrophe,are opposed to,mild,consequences,16,What we should do to,protect our earth?,Discussion:,Its high time,that,we took immediate measures to protect our earth from being polluted.,17,To begin with,we should not throw any rubbish here and there.Instead,we should pick it up.,18,Besides,we are supposed to ban the abuse of plastic bags.Plastic bags can make white pollution,which makes the environment worse and worse.,19,Whats more,we should stop factories from producing harmful gases and water.,20,Then,we appeal to others to take a bus or bike to go to school or work so as to reduce using private cars which cause air pollution.,21,Finally,it is good for us to care about plants.The more plants we have,the better the environment will become.,22,To begin with,we should not throw any rubbish here and there.Instead,we should pick it up.,Besides,we are supposed to ban the abuse of plastic bags.Plastic bags can make white pollution,which makes the environment worse and worse.,Whats more,we should stop factories from producing harmful gases and water.,Then,we appeal to others to take a bus or bike to go to school or work so as to reduce using private cars which cause air pollution.,Finally,it is good for us to care about plants.The more plants we have,the better the environment will become.,23,Lets protect our environment together!,24,Thank You!,25,