M6U4 the earth is becoming warmer（課堂PPT）

1、12earthquake3floods4droughts567Reading tips skim the title and Para 1: Title: THE EARTH IS BECOMING WARMER BUT DOES IT MATTER?Para 1: how has this come about and does it matter?happen8Read and underline the topic sentences of each paragraph. So how has this come about and does it matter? that it is

2、human activity that has caused this global warming rather than a random but natural phenomenon. All scientists subscribe to the view that the increase in the earths temperature is due to the burning of fossil fuels like. the levels of carbon dioxide have increased greatly over the last 100 to 150 ye

3、ars. it is the burning of more and more fossil fuels that has resulted in this increase in carbon dioxide. the attitudes of scientists towards this rise are completely different. No one knows the effects of global warming. Does that mean we should do nothing? agreeled to9 Reading tips: In English, s

4、ome nouns begin with a capital letter(大寫字母大寫字母), such as names of people and places, titles(標題標題) of magazines, newspapers, stories and books, peoples titles(頭銜頭銜), etc.global warming10Para.2 Human activity has caused global warming.Para.3 The increase of temperature is due to the burning of fossil

5、fuels.Para.4 The levels of carbon dioxide have increased greatly.Para.5 The burning of more and more fossil fuels has resulted in the increase of carbon dioxide.=This increase in carbon dioxide has resulted from the burning of more and more fossil fuels.11The attitudes of scientists to/towards the r

6、iseDr Foster George HamblyAttitudeReasonsThe trend which increase the temperature by 5 degrees would be a catastrophe.They are opposed to the view and believe that we should not worry about high levels of carbon dioxide in the air.There may be a rise of several meters in the sea level, or predict se

7、vere storms, floods droughts, famines, the spread of disease and the disappearance of species.It will make plants grow quicker; crops will produce more; It will encourage a greater range of animals- all of which will make life for human beings better.12The author probably agrees that _A. actually gl

8、obal warming is good for man.B. we should do nothing about the global warming.C. catastrophes will happen if the globe keeps on warming.D. a lot remains to be found out about the effects of global warming.Choices: to do sth. or not13 It is the burning of more and more fossil fuels like coal, natural

9、 gas and oil that is resulting in this increase in the earths temperature. 2. The earth is becoming warmer. 3. An increase of five degrees in the amount of warming would be a catastrophe .4. Any warming will be mild with few bad environmental consequences. 5. Greenhouse gases continue to build up in

10、 the atmosphere.Fact or Opinion?( O )( F )( O)( O )( F )14What is NOT true according to the passage? The rise in carbon dioxide is causing an increase in global warming. B. Everyone believes that global warming is caused by the activities of human. C. George Hambley believes that global warming will

11、 do good to the earth.A.D. It is clear what the effects of global warming will be.15DiscussionShould we do something or nothing about the global warming? Why?16Step V Summary The earth is becoming warming and all scientists _ _ the view that the increase in the earths temperature is due to the burni

12、ng 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 scienti

13、st called Charles Keeling found that the carbon dioxide in the atmosphere went up from around subscribe tofuelsgreenhouse gasesbyproductscarbon dioxidequantities oftendsgo upfossil17315 parts to around 370 parts _ million in 40 years. All scientists accept the date and agree the burning of more and

14、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 no

15、t 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.perresulted in trendcatastropheare opposed tomildconsequences18Thank you! 191.What is “greenhouse gases”?Some byproducts of this process are called “greenhous