课件46张PPT。
高二选修6
Unit 4英 语 课 件I. 代词 it
a. 用作人称代词, 代替前文提到的事物。
My watch is missing. I can’t find (it) anywhere.
Her father has gone abroad. Have you heard about (it)? b. 代替指示代词this, that。
What’s this? (It’s) a computer.
Whose pen is that? It’s mine.
c. 表示时间、天气、距离、季节、明暗等。
It’s time for lunch.
It’s getting warmer and warmer．It’s forty years since my hometown was liberated.
It’s summer now.
How far is it from here to the airport？
It’s about twenty minutes’ walk from here to the bus stop.II. 引导词：
a. 作形式主语, 代替由不定式, 动名词或从句表示的真正主语。其基本句型为：
It (形式主语) +adj. + to+ v.
It (形式主语) +adj. + that (subject (主语)+v. ) It (形式主语)+adj.+ whether (subject +v.)
It is ＋adj.＋for／sb. to do sth. (of )
It＋seems (appears)＋that (subject ＋v.) happens ① It is very important to help each other．
② It is no use / useless going there again．
③ It’s not decided yet when they will leave for Shanghai．
④ It seems that he has caught a cold. =He seems to have caught a cold． ⑤ Is ____?possible to master a foreign language in two months? A. now??B. that?? C. it? D. man
⑥ Is ____?necessary to tell his father the truth?
A. it? B. that???C. what? D. heb. 作形式宾语, 代替由不定式、动名词或从句表示的真正宾语。其主要基本句型为:
主语＋谓语＋it (形式宾语)＋宾语补足语＋to do sth. (doing sth. 或that从句).① Marx found it important to study the situation in Russia.
② She thought it no use to write to him again.
③ They want to make it clear to the public that they do an important and necessary job. ④ Do you think ___?difficult to work out this maths problem? A. that? ?B. very? ? C. yourself? D. it
⑤ Having been there many times, ___ to find Mr. Wang’s house. A. it was easy for him B. for him it was easy C. he found it easy D. he found easy c. 用在强调句型中, 为了强调句子的某一成分(通常是主语、宾语或状语), 常用结构:
It is / was ＋被强调部分＋that (who) ….
I met Tom in the street yesterday． ① It was I who (that) met Tom in the street yesterday.
② It was Tom that I met in the street yesterday.
③ It was in the street that I met Tom yesterday.
④ It was yesterday that I met Tom in the street.主语宾语时间状语地点状语⑤ ____?she had arrived home that she remembered her appointment (预约) with the doctor.
A. It was not until
B. Not until it was
? C. Not until
D. Until it was not 1. It ___ for this reason ___ her uncle moved out of New York.
A. is ... which B. was ... why
C. was ... that D. were ... how
2. It was ___ he said at the meeting __ disappointed me.
A. what.., that B. that.., that
C. what.., what D. that.., whatDrills3. ---Wasn’t it Dr. Li who spoke to you
just now?
--- ______.
A. I didn’t know he was B. Yes, he did
C. No, he didn’t D. Yes, he was
4. Was it during the Second World War ____ he died?
A. this B. then C. that D. while5. I don’t think _____ possible to master a foreign language without much memory work.
A. this B. it C. that D. its
6. Does ____ matter if he can’t finish the job on time?
A. it B. this C. that D. he7. Tom’s mother kept telling him that he should work harder, but __didn’t help.
A. he B. which C. she D. it
8. Was ___ in 1998 ___ your teacher graduated from university?
A. that.., that B. it... which
C. it... that D. it... when9. He felt ___ duty to work for human rights and progress.
A. it his B. his C. that is a D. that is his
10. ___ is no good ___ without doing anything.
A. This... talking B. It... to speak
C. That... to say D. It... talking11. All the children except my partner ___ late because of traffic jam.
A. is B. are C. was D. has been
12. Your new clothes fit you, but mine ___ me.
A. don’t fit B. doesn’t fit
C. don’t fit for D. aren’t fit(II) It的用法及强调句型 口诀：
代词 it 本意它, 既可指这又指那;
时间天气均可指, 谈到距离也用它;
假主假宾均可做, 强调句型跟that。1. It was this village ___ I was bought.
A. where B. that
C. on which D. which
2. It was in this village ___ I was bought up.
A. where B. that C. on which D. which3. Can it be in the drawer ___ you put your passport?
A. where B. in which C. there D. that
4. It was July 1, 1997 ___ saw the return of Hong Kong to the motherland. A. that B. when C. which D. in which5. It is two years __ I joined the army.
A. before B. since
C. that D. after
6. It was two years ___ I joined the army.
A. before B. since
C. that D. after7. --- Was it under the tree ___ you were away talking to a friend?
--- Sure. But when I got back there, the bike was gone.
A. that B. where C. which D. while
8. --- Why don’t we take a little break?
--- Didn’t we just have ____?
A. it B. that C. one D. this9. It was not until 1920 ____ regular radio broadcast began.
A. while B. which C. that D. since
10. ___ is the fact that English is being accepted as an international language.
A. There B. This C. That D. It11. It was about 600 years ago ___ first clock with a face and an hour hand was made.
A. that B. until C. before D. when
12. I hate ____ when people talk with their mouths full.
A. it B. that C. these D. them 13. It was only when I reread his poems recently ____ I began to appreciate their beauty.
A. until B. that C. then D. so
14. It is the ability to do the job ____ matters not where you come from or what you are.
A. one B. that C. what D. it15. The Parkers bought a few house but __ will need a lot of work before they can move in.
A. they B. it C. one D. which
16. ____ no need for us to discuss the problem again since it has already been settled.
A. It has B. There has
C. It is D. There is17. Was it in 1969 __ the American astronaut succeeded ___ landing on the moon.
A. when; on B. that; on
C. when; in D. that; in
18. Was ___ that I saw last night at the concert?
A. it you B. not you
C. you D. that yourself19. ____ was in 1979 ___ I graduated from the university.
A. That; that B. It; that
C. That; when D. It; when
20. What a pity my new computer doesn’t work! ____ must be something wrong with it.
A. It B. There C. This D. That21. I like ____ in the autumn when the weather is clear and bright.
A. this B. that C. it D. one
22. Someone is knocking at the door, but who can ___ be?
A. one B. he C. she D. it23. A knock on the door made him look up. But ___ was only the manager.
A. this B. that C. she D. it
24. Someone is ringing the doorbell. Go and see ____.
A. who is he B. who he is
C. who is it D. who it is 25. Is ___ necessary to complete the design before National Day?
A. this B. that C. it D. he
26. Does ___ matter if he can’t finish the job on time?
A. this B. that C. he D. it27. It worried her a bit ___ her hair was turning grey.
A. while B. that C. if D. for
28. They have made __ a rule __ in the room.
A. this; not to smoke B. it; smoking
C. it; to not smoke D. it; not to smoke课件42张PPT。
高二选修6
Unit 4英 语 课 件Language points1. What do you think green house gases do?
你认为温室气体有什么作用呢?
▲本句中think后接了一个由what引导的宾语从句。但应注意的是：特殊宾语从句即当一般疑问句主句的谓语动词是think, believe，suppose，consider, imagine，guess和suggest等时，表疑问的词要放在主句前即句首。例如：
[正] Who do you think will win in the game?
[误] Do you think who will win in the game? 当然一般情况下宾语从句的疑问词应放在主句之后，例如：
[误] Why do you know we can’t cut down the big tree?
[正] Do you know why we can’t cut down the big tree?2. So how has this come about and does it matter? [考点] come about是不及物短语，意为“发生”。
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 about得到，获得出来， 露出达到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
[点拨] 根据句意“已经十点钟了。我不知道是怎么回事，这么短的路程她迟到了两个小时。”选C。come over来访；come out出来，出版；come up出现，到来。3. There is no doubt that the earth is
becoming warmer and that it is human
activity that has caused this global
warming rather than a random but
natural phenomenon.
There is no doubt that….
There is some doubt whether….
辨析：主句为肯定句时，doubt后使用连词whether。主句为否定句时，doubt后则使用连词that。 e.g.:
There’s no doubt that one day a
cure will be found.
There is little doubt that he was
the killer.[考点1] There is no doubt that ...是固定句型，意为“毫无疑问……”，that引导的是同位语从句，用来进一步补充说明doubt的具体内容。
[考例] Some researchers believe that there is no doubt ______ a cure for AIDS will be found. (广东2005)
A. which B. that C. what D. whether
[点拨] 根据固定搭配there is no doubt that ...可知选B。[考点2] it is ... that ...在此句中构成强调句型，强调的是主语human activity。强调句型除谓语不能强调外，可强调主语、宾语或状语。
[考例1] It is not who is right but what is right ______ is of importance. (重庆2007)
A. which B. it C. that D. this
[点拨] 根据强调句型的判断方法：将it is和that去掉后，此句成为Not who is right but what is right is of importance，是一个完整的句子，故此题是一个强调句型。[考例2] I don’t mind her criticizing me, but ______ is how she does it that I object to. (江西2007)
A. it B. that C. this D. which
[点拨] 去掉it is和that后，本句相当于..., but I object to how she does it，是个完整的句子。故此句是it强调句型，被强调部分是宾语从句。4. amount of
习惯用语：
an amount of 相当数量的; 一些
any amount (of) 任何数量(的); 大量(的)
be of little amount 不重要; 无价值 n. 数量
large amounts of money 大量的金钱
In an invoice the amount of money should be written both in words and in figures.
发票上的钱数要用字和数码写出来。5．Without the ‘green house effect’, the earth would be about thirty-three degrees Celsius cooler than it is.
如果没有温室效应，地球会比现在冷33℃。
▲这是一个含蓄虚拟条件句 应该注意有时假设的情况并不以条件从句形式表示出来，而是通过一个介词短语或其他方式表示。常用的词或短语有：without, but for, but that, otherwise, or, but等。 例如：
Without your help ( = If we had not had your help), we could not have succeeded．
要是没有你的帮助，我们是不会成功的。 But for electricity (= If there were no electricity), there would be no modem industry．
要是没有电，就不会有现代工业。 He was having a meeting with his students; otherwise he would have come.
他当时正与他的学生进行讨论，否则的话他就来帮我们了。 He felt very tired yesterday, or he would have attended the party．
他昨天很累, 不然他就参加那个聚会了。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.
[翻译] 是一位名叫查尔斯·奎林的科学家把1957至1997年期间大气层中二氧化碳的含量作了精确的统计。
[点拨] 该句是一个it was ... who强调句。a scientist called Charles Keeling是被强调部分，其中called Charles Keeling为过去分词短语作后置定语，修饰a scientist。7. result in 导致, 造成 =lead to The accident resulted in three people
being killed. 这一事故导致他的死亡。 The accident resulted in his death.8. 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.
[翻译] 在另一方面, 还有一些人，对这一观点持反对态度，像科学家乔治·汉布利，他们认为我们不必担心空气中高含量的二氧化碳。[点拨] 该句是一个主从复合句。主句为there are those，like scientist George Hambley作句子的插入语，who引导的定语从句修饰those，且在该定语从句中其谓语动词believe又带有that引导的宾语从句。句子的主要部分可以表示为: ... there are those who believe that ... on the other hand: used to give another opinion or fact that should be considered as well as the one you have just given 另一方面
also on the one hand. .. on the other hand I’d like to eat out, but on the other hand I should be trying to save money.
I want to go to the party, but on the other hand I ought to be studying.
我想去参加聚会，但从另一方面来说，我应该留下来学习。9. consequencein consequence 因此
as a consequence 结果
as a consequence of 由于…的结果10. rangein /within range 在射程之内
out of / beyond range 在射程之外11. build upBuild up the business
Sediment (沉淀物)builds up on the ocean floor.
This built up my hope after the interview.develop 扩大, 发展 collect 累积, 收集 增加, 支持, 树立12. even if /though: used to emphasize that, although something may happen or may be true, it will not change a situation
I wouldn't tell you even if I knew. Even if she survives, she’ll never fully recover.
Even though he’s 24 now, he’s still like a little child.
I can still remember, even though it was so long ago.I. 根据下列各句句意及所给单词的首字母或汉语提示，写出各单词的正确形式。
1. A large q______ of rice is badly needed here.
2. Students are from a wide r______ of backgrounds.
3. She studied hard, and in c____________ she passed the exam.
4. The park attracts 4 million visitors p___ year.quantityrangeconsequenceper练习5. What sort of ______ (燃料) do these machines need?
6. The ______ (数据) is still being analysed. So don’t be so worried.
7. The earthquake was a terrible _____________ (大灾难).
8. A rainbow is a natural ___________ (现象) especially after a heavy rain.
10. The ______ (曲线图) of export indicates a new success of the company.graphfuel data catastrophephenomenonII. 根据句意, 选择适当的单词或短语填空
1. climate; weather
a. It’s very difficult for her to get used to the dry and cold ______ there.
b. How we wish the sunny ______ could keep up for another several days!
2. come about; come across
a. I’ve never ___________ anyone quite like her before.
b. Please tell me how the accident __________. I am still in the dark. climateweathercome acrosscame about3. quantity; quality
a. Much of the land was of poor ______.
b. Buy vegetables in small __________, for your immediate use.
4. result in; result from
a. The accident ___________ the death of three people.
b. His failure ______________ not working hard enough.qualityquantitiesresulted inresulted from5. glance; glare; stare
a. He ______ angrily at her across the dinner table.
b. She ______ at the page for several minutes, trying to understand.
c. She ______ round the room before she left.glaredstaredglancedIII. 每空一词, 使两个句子的意思相同。
1. It was very late, but they went on working.
It was very late, but they ___ ___ working.
2. We don’t doubt that he can do a good job.
_____ ___ ___ ___ ____ he can do a good job.
3. Their carelessness led to the failure.
Their carelessness ______ __ the failure.kept onThere is no doubt thatresulted in4. I don’t know how the accident happened.
I don’t know how the accident ____ ______.
5. The factory turns out a large number of paper products.
The factory turns out ______ _____ ______ ________ paper products.
6. Although they raise the price, he’s going to buy the farm.
He’s going to buy the farm ______ ______ they raise the price.even if / thoughcame aboutlarge quantities of/ a lot ofIV. 根据括号内的提示将下列句子翻译
成英语。
他的粗鲁导致了孩子和他的争吵。(result in)
2. 他们不知道这个变化是怎样产生的。
(come about)They didn’t know how the change had come about.His rudeness resulted in the child’s quarreling with him.3. 他以优质的服务使生意逐步兴隆起
来。(build up)
4. 邻居们让他们停止制造噪音, 但他们
仍然继续。(keep on)The neighbours asked them to stop making a noise, but they still kept on.He built up his business by good service.5. 不用担心, 我们已经储藏了很多食
物。(quantities of)
6. 那个老人瞥了一下他的手表, 然后看
了看天空。(glance at)The old man glanced at his watch and then looked at the sky.Don’t worry. We have stored quantities of food already.课件27张PPT。
高二选修6
Unit 4英 语 课 件Discovering useful words and expressionsDiscovering useful words and expressions (P28) Go over the new words and phrases in the previous sections. Then complete each sentence with one of those new words or phrases.21. Charles Keeling collected ______on the carbon dioxide content in the atmosphere over a forty-year period. He found that the amount of carbon dioxide _______ increasing during that time.datakept on2. Although we are burning coal in huge _________ every year, we won’t ________ of it for centuries.
3. If the amount of greenhouse gases continues to _______, we could be facing a global __________.quantitiesrun outbuild upcatastrophe4. Many scientists believe that global warming has __________ through the burning of fossil fuels. come about5. The _____________ of a rising sea level would be widespread flooding.consequence6. On the whole the warming of the earth is a ____________ that causes great concern.
7. The __________ shows temperature changes during the 20th century.
8. One hectare of forest can absorb 23 tons of carbon dioxide ____ year.phenomenongraphper9. The washing machine uses too much energy, but _________ we buy a more economical one, it would still use too much water.
10. The car accident on the main road yesterday ___________ one driver’s death.even if resulted in由it引导的强调句结构：
It is (was)+被强调部分+that (who) + 句子其他部分
注意：此结构强调的成分仅限于主语，宾语和状语。Explanation如：
原句：My father did the experiment in the lab yesterday evening．
强调主语：It was my father who/that did the experiment in the lab yesterday evening．强调宾语：It was the experiment that my father did in the lab yesterday evening．
强调时间：It was yesterday evening that my father did the experiment in the lab．强调地点：It was in the lab that my father did the experiment yesterday evening．
e.g. It was in that city that we met for the first time．
It was not until he told me that I knew the truth．典型例题分析：
1) It was last night ____ I saw the film Star Wars．
A. who B. when
C. that D. whichC答案C 强调句的结构是：It + be + 强调部分 + that (who) +主谓句。强调句的连词只有两个，that和who。当强调的部分是人，且为句子的主语时，才用who，其余用that。2) It is ten years ____ Miss Green
returned to Canada．
A. that B. when
C. since D. as
答案C 考点是连词用法。本题易误选为A其实本句不是强调句。 若是去掉It be…that还应是一个完整的句子。而本句去掉It is…that, 只剩下ten years Miss Green returned to Canada不成句。因此本句不是强调句。It is + 时间+since...，其中 is = has been.1. It was this village ___ I was bought.
A. where B. that
C. on which D. which练习 I2. It was in this village ___ I was bought up.
A. where B. that
C. on which D. which3. --- Was it under the tree ___ you were away talking to a friend?
--- Sure. But when I got back there, the bike was gone.
A. that B. where
C. which D. whileII. 根据下列各句句意及所给单词的首字母或汉语提示, 写出各单词的正确形式。
1. The organization has been in e______ for 25 years.
2. What is the a______ rainfall for August in your country?
3. The earthquake caused a w______ damage to the area.
4. With the development of technology, people are more and more familiar with ______ (外部的) space.outerexistenceaverage widespreadIII. 每空填一词, 使该句与所给句子的意思相同。
1. We depend on energy to do many things.
___ __ energy ____ we depend on to do many things.
2. He didn’t go to school because he was ill.
__ ____ because he was ill _____ he didn’t go to school.It isthatIt wasthat3. My father didn’t return until 11 o’clock last night.
___ ___ __ ______ 11 o’clock ______ my father returned last night.
4. David bought a walkman from a store yesterday.
__ ____ David _________ bought a walkman from a store yesterday.It was not untilthatIt wasthat / who5. The mountain climber was rescued with the help of the local people.
__ ____ with the help of the local people ______ the mountain climber was rescued.
6. Her uncle moved out of the city and settled down in a small village for this reason.
__ ___ for this reason ______ her uncle moved out of the city and settled down in a small village.It was thatIt wasthat7. What on earth do you want me to say?
____ _ __ ___ you want me to say?
8. I didn’t receive the manager’s reply until nearly a month later.
___ ___ ___ ____ nearly a month later ____ I received the manager’s reply.What is it that It was not untilthat 9. Marx met Tracy in Pairs in 1845.
___ ___ in Pairs ____ Marx met Tracy in 1845.
10. The football match had to be called off because it rained heavily.
__ ____ because it rained heavily ____ the football match had to be called off.thatIt wasthatIt wasIV. 根据括号内的提示将下列句子翻译成
英语。
总的来说，我很喜欢这本书。(on the whole)
2. 昨天的平均温度是28摄氏度。(average)On the whole, I like this book very much.The average temperature yesterday was 28°C.Make four sentences with
“it” for emphasis.Homework课件22张PPT。
高二选修6
Unit 4英 语 课 件 Listening
＆ Speaking I. Listen to the tape and decide which statements Professor Keeling does NOT agree with.
1. We should stop depending on fossil fuels for our energy.
2. 90% of our energy comes from fossil fuels.3. We can replace fossil fuels with
cleaner sources of energy.
4. Nuclear power is a good source of
energy.2. Listen to Part 1 again and tick the energy sources that are mentioned. Complete the notes on them.Produce carbon dioxide
cheap and concentrated form of energyclean
not very practical with present technologydoes not produce carbon dioxide
dangerousclean
not practical: need huge areas of land to provide enough energy3. Listen to Part 2 and the list three things we can do to save energy. First we must try to find ways to use fossil fuels that does not put carbon dioxide into the air.
Second we must produce products that are economical with energy.
Third we must ask people to cut down on the energy the use.4. Listen to part 2 again and fill in the blanks.LI BIN: …What about _______? They don’t cut down on their use of ______.energyfactoriesKEELING: No, they don’t. However, that is a _______ we must work on as a ______ community. That means ________ and _________ countries will have to work together.problemglobaldevelopeddevelopingLI BIN: But it’s not the _________ countries that put most of the carbon_______ into the air. The developed countries are really the ones to ______.developingdioxideblameAnswer key for Exercise 2(P62):An organization by kids of kids; concerned with the environmentFour students in Australia; in 1996To draw attention to the environmentThe horse that Saved the WorldTo explain why it’s better for the environment if we walk to school, ride bikes or go by busAnswer key for Exercise 3:
Methods of saving energy:
Buy energy-saving goods
Turn off appliances when not using them
Projects that Millennium Kids have
done:
1 planted trees
2 developed activities that reduce, reuse
and recycle waste
3 planned ways to reduce recycle and
reuse plastic bagsAnswer key for Exercise 1 (P65)Part 1: How Ian Kierman began Clean-up Australia DayPart 2: Clean-up the World Day and Ian Kierman’s contribution to improving the environmentAnswer key for Exercise 2 (P65)1987Ian Kiernan competed in a round-the-world yacht race He was shocked at the pollution in the ocean. 1989Clean-up Day for Sydney Harbour 40,000 volunteers; collected old car bodies, plastics, glass bottles, cigarette butts 1990the first Clean Up Australia Day 300,000 volunteers 2001Clean Up Australia Day most common kinds of rubbish: cigarette butts, glass bottles and plastic bags 1993the first Clean Up the World Day 30 million volunteers in 80 countries 2001Clean Up the World
Day 40 million volunteers in 128 countries; cleaned streets, beaches, river banks and parks Homework
Prepare a talk about “Clean Up China Day”.课件44张PPT。
高二选修6
Unit 4英 语 课 件Reading What is the greenhouse made and used for? A greenhouse is made of glass and is used for growing plants, especially during cold weather.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.What are the “greenhouse gases”?
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.What do you think greenhouse
gases do?
They trap heat from the sun and therefore warm the earth.(Paragraph 1)Introduce a debate over the issue of global warming. Raising a questionSkimming (Paragraphs 2---3) Illustrate how global warming comes about.Giving examples, using graphs, explanation. (Paragraphs 4---5) List two different attitudes among scientists towards global warming.Giving examples, making contrast. (Paragraph 6) It’s up to readers to think and decide whether people should do something about global warming or not.Using a question, leaving readers to think over the issue. Read the text carefully and fill in the blanks.gasesquantities ofglobal temperaturecatastrophehigh levels consequencesStatespositiveChoose the best answers according to the text.
1. Which of the following is TRUE according to the text?
A. The temperature of the earth increased about one degree Fahrenheit during the 20th century.
B. The carbon dioxide content in the air increased by 70 parts per million from 1957 to 1997.
C. All scientists accept the data in graph 2 except Charles Keeling.
D. Janice Foster says that more carbon dioxide will make plants grow faster.A2. Which of the following is Dr Janice Foster’s opinion?
A. The result of the temperature increase will be serious.
B. The amount of warming is nothing serious.
C. We needn’t worry about high levels of carbon dioxide.
D. Global warming is a natural phenomenon.A浓度单位Answer the questions.
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.Post reading2. What are the names of the three scientists mentioned in the article?
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 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 more and more fossil fuels that is resulting in a big increase in carbon dioxide.4. What are the two graphs about?
Graph I shows the temperature increase of one degree Fahrenheit between 1860 to 2000.
Graph 2 is about the carbon dioxide content in the atmosphere, 1958--1990.5. What is the main topic of the
article?
Global warming/ the warming of
the earth.2. Check the statements on page 27
True: 3, 5, 6, 7, 8
False: 1, 2, 4, 9, 10
Correct sentences:
1. The temperature last century increased
much.
2. Not everyone believes that global
warming is caused by human activities.4. Natural gas is not a greenhouse gas
but a fossil fuel.
9. George Hambley thinks that more
carbon dioxide is a positive thing and
it will make plants grow faster.
10. It is unknown what the effects of
global warming will be.Debate
Instructions
● Get into groups of six. Decide which three in your group are going to agree with the statement (Group A) and which three are going to disagree with the statement (Group B).● Group A discuss why they agree with the statement; Group B discuss why they disagree.
● Group A and B get together. Tell each other the reasons why agree or disagree with the statement.Supplementary materials for debating
Global warming
1. The planet has warmed anywhere from 0.5 to 1.0°C (1 to 2°F) over the last century. This small amount makes a huge difference, causing glaciers to melt and, potentially (潜在的), sea level to rise. We could see even more of this in the future, (maybe another 3°C, or 5°F)global warmingglobal warming2. A definition of global warming would have to include a measurable, consistent temperature rise, like the one we have seen in recent history. A question remains – Is it an unusual change? Much debate about that one.3. The earth gets one kind of energy (visible light) from the sun and gives off another kind (infrared红外线). This kind is what gets trapped by "green house gases" (GHG's) in the atmosphere.Green house gases
4. The global warming green house effect really is a bogus (假的) term. A greenhouse keeps warm by physically trapping the air inside and preventing convection (对流). The atmosphere helps keep the planet warm by trapping outgoing radiation instead.5. The leading gasses are Carbon-dioxide, Methane, Ozone (臭氧) and Nitrous Oxide (一氧化二氮). Gas analyzers show the concentrations of this stuff have increased somewhat since the beginning of the industrial revolution. 6. The greenhouse effect raises the average temperature of the Earth by more than 30 degrees, so without it the Earth would be a very cold place! green house effectgreen house effect GREENHOUSE
Feeling helpless to do anything about global warming?
Find out how one family cut their own personal greenhouse-gas emissions by 65 percent--and how you can do the same.green house effect Homework
1. Read the passage again and review
the new words and expressions.
2. Prepare the debate in groups.
3. Preview Using Language -- WHAT
CAN WE DO ABOUT GLOBAL
WARMING?课件14张PPT。
高二选修6
Unit 4英 语 课 件Using language What can we do
about global warming Skim the letters and find who the writers are and what their purpose of writing the letters is. SkimmingThe first letter is written by a student who is asking for suggestions for his project — global warming.
The second letter is written by an editor of Earth Care magazine. He offers the student some suggestions on what to do about global warming. List Earth Care’s suggestions and then in groups, discuss whether you think you can carry out each suggestion. ScanningIf you are not using electrical appliances, turn them off.YesSave
energyYesSave
energyYesSave
energyYesSave
energyIf you’re cold, put on more clothes instead of turning up the heat.Motor vehicles use a lot of energy, so walk or ride a bike if you can.Recycle cans, bottles, plastics and newspapers and buy things made from recycled materials.YesSave
energyYesPlants absorb carbon dioxide from the air.Plant more trees.Get your parents or friends to buy products that are made to save energy.YesTogether, individuals can make a difference.Talk with your family and friends about global warming and tell them what you’ve learned.Read the text carefully and fill in the blanks.What can we do about global warming?
◆ Turn a(n) 1 _________________ off when you’re not using it.
◆ Put on more clothes instead of turning up the 2 _____.
◆ Walk or 3 _________ instead of taking motor vehicles.
◆ 4 ________ cans, bottles, plastics and newspapers.electrical applianceheatride a bikeRecycle◆ Buy things made from 5 __________
__________.
◆ Buy products that are made to save 6________.
◆ 7__________ in your garden or your school yard.
◆ Talk with your family and friends about 8_______________. recycled
materialsenergyPlant treesglobal warmingI. 根据下列各句句意及所给单词的首字母或汉语提示，写出各单词的正确形式。
1. You’ll need three large c____ of paint.
3. I got out of the car but left the m______ running.
4. They decided to set up a(n) ______ (核的) power station.
5. I’ll heat it up in the _________ (微波炉).Practise cans motor nuclearmicrowaveII. 用所给词的适当形式填空。
1. There was _____________ (disagree) among doctors about the best way to treat the disease.
2. _________ (pollute) from cars is the main cause of global warming.disagreementPollutionIII. 根据括号内的提示将下列句子补充完
整。
If she could ______________________
________ (忍受那里的条件), we would take her with us.
2. I don’t mind your knowing it ________________________ (只要事情不进一步发展).
3. If you want to save energy, you’d better not use the air conditioner, the heater _________ (等等) when it is not necessary. put up with the conditions
thereso long as it goes no furtherand so on4. I realized that she was right — and it _________________ (有影响).made a difference课件24张PPT。
高二选修6
Unit 4英 语 课 件Warming up Fossil fuel (化石燃料): Ancient animal and plant material below the surface of the earth with a high carbon content, such as coal, oil and natural gas, which can be burnt to produce energy. Also known as non-renewable energy because once they are used they have gone forever; they cannot be renewed. From the following pictures, you will know where all this energy comes from.windmillsa coal power stationan oil refinerya nuclear power plantsolar panelshydro-electric damSample listslightheatingcoalnon-renewableoilnon-renewabletelevision cassette player video recorder computer natural gasnon-renewable wind (wind power)renewable sun (solar energy)renewable uranium (nuclear energy)non-renewable fridgestovewashing machinehairdryerwater (hydro-electric)renewableplant waste (biomass energy)renewablehot springs or geysers (geothermal energy)renewablethe sea (tidal energy)renewableRenewable or non-renewable?√Renewable or non-renewable?√What is told in the picture?non-renewable energy source Notes to Renewable energy
Renewable energy resources may be used directly, or used to create other more convenient forms of energy. Examples of direct use are solar ovens, geothermal (地温) heating, and water and windmills. Examples of indirect use which require energy harvesting are electricity generation through wind turbines (涡轮) or photovoltaic (光电的) cells, or production of fuels such as ethanol (酒精) from biomass (生物量). Renewable energy (sources) or RES capture their energy from existing flows of energy, from on-going natural processes, such as sunshine, wind, flowing water, biological processes, and geothermal heat flows. Most renewable energy, other than geothermal and tidal power, ultimately (基本上) come from the Sun. Some forms are stored solar energy such as rainfall and wind power which are considered short-term solar-energy storage, whereas the energy in biomass (生物量) is accumulated (积聚) over a period of months, as in straw, or through many years as in wood. Capturing renewable energy by plants, animals and humans does not permanently deplete (耗尽) the resource. Fossil fuels, while theoretically renewable on a very long time-scale, are exploited at rates that may deplete these resources in the near future.1. Review the new words and
expressions you learned in this
class.
2. Preview Reading.Homework课件23张PPT。
高二选修6
Unit 4英 语 课 件Writing Answer key for Exercise 1:
1 the main point of view to be circled: All sorts of items become litter, but two of the most common and most dangerous are cigarette butts and plastic bags. 2 The evidence about cigarette butts Tom gives to support his argument to be underlined: Over 1,600 billion cigarettes are smoked each year in China… the toxic chemicals add up to a great amount.3 The evidence about plastic bags Tom gives to support his argument to be boxed: They are made from… to kill another animal. 4 Tom’s solutions:
1) Put cigarette butts in the rubbish bin.
2) Not to let plastic bags become litter.
3) Use fewer plastic bags and recycle them
4) Not to smoke.
5) Not use plastic bags at allAnswer key for Exercise 2 (P67)Litter is a serious environmental problem Cigarette butts are small but are still bad for the environment. 1. Over 1,600 billion cigarettes are smoked each year in China. Many of the butts become litter.2. 4.5 trillion butts are littered every year in the world.
3. Butts spoil the beauty of the environment
4. Butts contain toxic chemicals. These get into the water supply. These decrease the quality of the water and endanger living things.
5. Butts take up to 5 years to break down, so the toxic chemicals add up to a great amount.Plastic bags are a danger to the environment.Plastic bags are made from non-renewable resources. If they are not recycled, these resources are lost to us.
In China, 2 billion plastic bags are used every day. Many of these become litter. 3. Plastic bags last from 20 to 1000 years in the environment.
4. They can travel long distances in the air and water. They are in rivers, parks, beaches and oceans.
5. Plastic bags kill up to one million seabirds, 100,000 sea mammals and countless fish each year worldwide.6. After the animal breaks down, the plastic bag becomes free and can kill another animal.The environment would be less polluted if we cleaned up cigarette butts and plastic bags. The best solution would be not to smoke or use plastic bags at all.Writing Task (P67)
Writing tips:
Step 1: Write out the thesis statement.
(point of view)
Step 2: Write out the topic sentence of the first body paragraph.
Step 3: Give the supporting points and
details about the first subtopic. Step 4: Write out the topic sentence of the second body paragraph.
Step 5: Give the supporting points and details about the second subtopic. (more body paragraphs ...)● Now choose a topic from the below list that you feel strongly about. Make notes on your topic using headings similar to those in the table above. Use Tom's essay as a model to write your own.A sample list of environment topics:
air pollution, noise, soil erosion, water pollution, litter classification, desertification, make green by planting treesA sample version:
The Environmental Effects of Fossil Fuels
There is no doubt that fossil fuels bring a lot of good to us. But do you know that many of the environmental problems our country faces today result from our fossil fuel dependence. The environment faces air pollution, global warming, acid rain, and several other very serious problems because of our use of fossil fuels. Over the last 150 years, burning of fossil fuels has resulted in more than 25 percent increase in carbon dioxide in our atmosphere. Carbon dioxide is one of the main factors in global warming which is negatively affecting everyone.
Fossil fuels also affect water pollution, land pollution, and thermal pollution (heat pollution). Coal mining is one of the causes of pollution in the environment. After the mining is completed, the land will remain barren. Materials other than coal are also brought to the surface in the coal mining process, and these are left as solid wastes. The production, transportation, and use of fossil fuels are to blame for the effects of pollution on the environment. Then what should we do? We should spare no effort to improve our environment. Please save energy and use fewer fossil fuels in our daily lives.
