Unit 4 Global warming (浙江省杭州市余杭市)

课件40张PPT。ReadingThe Earth is Becoming Warmer---But Does it Matter?What’s wrong with our earth?Pre-readingGreenhouse 1. What is a greenhouse made of and used for?2. How does it work?3. What are the “greenhouse gases”? 4. What do you think greenhouse gases do? A greenhouse is made of glass and is used for growing plants, especially during cold weather.1. What is a greenhouse made of and used for?2. How does it work?The air inside is warm because the glass traps the heat from the sun and keeps it from escaping. This makes the greenhouse heat up and so the plants can grow throughout the cold period.3. What are the “greenhouse gases”? 4. What do you think greenhouse gases do?In the atmosphere surrounding the earth there are gases, which are called “greenhouse gases”, including carbon dioxide, methane(甲烷, 沼气) and water vapor.They trap heat from the sun and therefore warm the earth.What’s wrong with our earth?methaneCarbon dioxideWater vapourGreenhouse Effect The greenhouse effect is a naturally occurring process that aids in heating the Earth's surface and atmosphere. It results from the fact that certain atmospheric gases, such as carbon dioxide, water vapor, and methane, are able to change the energy balance of the planet by absorbing longwave radiation emitted from the Earth's surface. Without the greenhouse effect life on this planet would probably not exist. SO…The earth is becoming
warmer and warmer----
But does it matter?YES & NO ???Maybe… The sea level will riseMaybe…There will have some disasters, such as…Flood!Drought!Famine!Forest Fire! ......Read the text as fast as possible and answer the questions:Who wrote the magazine article? What is the name of the magazine?
2. What are names of the three scientists mentioned in the text?
3. What are they think about global warming?
4. What are the two graphs about?
5. What is the main topic of the article?skimmingWho wrote the magazine article? What is the name of the magazine? Sophie Armstrong The name of the magazine is Earth Care.2. What are names of the three scientists mentioned in the text?They are Dr. Janice Foster, Charles Keeling and George Hambley.3. What do they think about global warming? Do they agree with one another? They don't agree with each other. Dr. Janice Foster thinks the effects 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 more and more fossil fuels that is resulting in a big increase in carbon dioxide.It shows that the temperature increased one degree Fahrenheit from 1860 to 2000.4.What are the two graphs about?This graph shows the carbon dioxide content in the atmosphere increased steadily from 1957 to 1997.4. What is the main topic of the
article?
global warming/
the warming of the earth.The temperature in the last century didn’t increase much .
Everyone believes that global warming is caused by the activities of humans.
Janice Foster believes that global warming is caused by burning fossil fuels .
Natural gas is a greenhouse gas .
Carbon dioxide is a byproduct of burning fossil fuels.TTFTTscanningor6 People accept Charles Keeling’s data because he took accurate measurements .
7 Flooding could be one of the effects of future global warming .
8 George Hambley believes scientists are just guessing about the effects of global warming .
9 George Hambley is worried about the effects of carbon dioxide on plant growth .
10 It is clear what the effects of global warming will be . TTTFFCareful reading1. Read the text carefully and sum up the main idea of each part.2.The different ideas between Dr. Janice Foster
& George HambleyPart 1.--------Para 1Part 2.-------Para2-3Part 3.-------Para4-6 Part 4.-------Para7Part one:Para1Introduce a debate over the issue of global warmingPart two:Para2-3Illustrate (explain) how global warming comes about. List two different attitudes among scientists towards global warming It’s up to readers to think and decide whether people should do something about global warming or not .Part three: Para4-6Part four:Para 71. Read the text carefully and sum up the main idea of each part.2.The different ideas between Dr. Janice Foster & George Hambleygo upcatastrophevery seriouspositiveproduce a greater range of animalsLanguage pointsDifficult and important sentences:It is 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 earth’s temperature is due to the burning of fossil fuels like coal,…
Some byproducts of this process are called “greenhouse” gases, the most important one of which is carbon dioxide.
4. There is a natural phenomenon that scientists call the “greenhouse effect”.
5. It means that more heat energy tends to be trapped in the atmosphere causing the global temperature to go up.
6. It was a scientist called Charles Keeling, who made accurate measurements of the amount of carbon dioxide in the atmosphere from 1957 to 1997.
7. They also agree that it is the burning of more and more fossil fuels that has resulted in this increase in carbon dioxide.9. On the other hand, there are those, like George Hambley, who are opposed to this view, believe that we should not worry about high levels of carbon dioxide in the air .8. He says that over the next 100 years the amount of warming could be as low as 1 to 1.5 degrees Celsius, but it could be as high as 5 degrees.1. rather than 而不是……She is a career woman rather than a housewife.It ought to be you rather than me that sign the letter.2. So how has this come about and does it matter?come about 是不及物短语，意为“发生”。come across
come around
come into being
come into effect
come out
come down to earth偶尔遇到
来访;苏醒
出现,产生
开始生效
出版;长出;显出
回到现实中来1) It’s already 10 o’clock. I wonder how it ____ that she was two hours late on such a short trip. (湖北2006)
A. came over B. came out
C. came about D. came up C来访；出现，到来。2) Please tell me how the accident_____. I am still in the dark. (2005 江西)
A. came by B. came out
C. came to D. came aboutD得到，获得苏醒；涉及，谈到 3. There is no doubt that the earth is becoming warmer.There is no doubt that….
There is some doubt whether…. There is some doubt whether John will come on time.Some researchers believe that there is no doubt that a cure for AIDS will be found.4. result in 导致, 造成 =lead toresult from 由…引起，产生The accident resulted _______ the driver’s carelessness, which resulted ______ the death of two passengers.frominIt is an illness that can result ___total deaf if left untreated. A of B from C in D toCThe experiment _____ the discovery of a cure for cancer.
A. resulted in B. lead to C. resulted from D. was caused by
2. He slipped and broke his leg. ______, he will have to be away from school for two or three months. A. Resulting in B. With the result that
C. As a result D. The result is thatAC5. consequencein consequence 因此
as a consequence 结果
as a consequence of 由于……
in consequence of ?由于，因为…的缘故
take the consequence of 承担…后果I overslept, and ________________ (因此) I was late for work.
_______________________________(由于) your bad work, I am forced to dismiss you.
You must __________________________(承担后果) your carelessness.in consequenceAs a consequence of/ In consequence oftake the consequence of6. build up1) He wanted to build up a large company. 
2) Promote physical culture and build up the people’s health！ 
3) Don't build up a story. 
4) The singer has been built up into a great success. 建立；增强；编造吹捧,赞扬；建立；增强；编造；吹捧,赞扬build up from nothing 白手起家
build up a powerful physique 锻炼出强健的体格典型例题分析：
1) It was last night ____ I saw the film Star Wars．
A．who B．when C．that D．whichC2) It is ten years ____ Miss Green returned to Canada．
A．that B．when C．since D．as3) It was this village ___ I was brought up.
A. where B. that C. on which D. which4) It was in this village ___ I was brought up.
A. where B. that C. on which D. whichCABUsing languageWhat can we do about global warming?phrasesrenewable resourceson behalf of my schoolbe casual aboutYour contribution counts!
cause the global temperature to go up
depend fossil fuels
make a difference
a natural phenomenon
put up with pollution
leave an electrical appliance on可再生能源代表我校对…漫不经心你的贡献很重要引起全球温度上升依赖矿物原料有影响;有作用一种自然现象忍受污染让一种电器设备开着Who is the writer?
2. What is the purpose of the e-mail?
3. Does Earth Care agree with Ouyang Guang’s opinion that individuals can have no effect?
SkimmingA student named Ouyang Guang.His opinion is that, as an individual, he can have no effect on environmental problems.No, Earth Care does not agree.Scan the second letter and list Earth Care’s suggestions:ScanningEarth Care’s suggestions:Turn electrical appliances off when not using them.Don’t turn up the heat, put on more clothes.Walk or ride a bike, don’t drive.Recycle cans, bottles, plastic bags and newspapers.Buy things made from recycled materials.Buy products that use less energy.Plant treesTalk with family and friends about global warming.Language points1. make a difference make a difference (1)有很大差别, 有很大不同
(2)有很大的关系/影响
make some/ no difference to 对...有些/没有关系That makes no difference to me.
Exercise can make a great difference to your health.2. put up with put upThat woman, as a housewife, has a lot to put up with. 忍受;忍耐;受苦put aside节省(钱、时间);储蓄;把……放在一边put awayput back放回原处;恢复正常 put down写下;记下;put forward提出(意见、建议);put off延期;推迟put on假装;穿上,戴上 ;上演(戏剧) put out熄灭;使忧虑;扑灭;出版放好，收好建造；张贴；提高；投宿；提出3. so long as / as long as只要，如果As long as there is life there is hope.You can go out, as / so long as you promise to be back
before 11 o'clock. Changing schools made a big difference ___ my life.
for B. to C. of D. on
2. I can ____ some noise while I’m studying, but I can’t stand loud noise.
come up with B. put up with
C. catch up with D. keep up withBB3. You can go out to play ____ you promise to return before 5 o’clock.
so long B. so far C. as far as D. as long as
4. She has 4 children now with another ___.
on the way B. in a way
C. makes its way D. no way
5. The experiment that Franklin ____ proved that lightning and electricity were the same.
carried on B. carried off
C. carried over D. carried out
6. Since there were still some ___ among them, they decided to have a further discussion about the problem.
A. achievement B. attention C. disagreements 拿走,夺走(使)继续下去，
将…延后 前往，行进 DADC