人教版（新课程标准） 选修六 Unit 4 Global warming Warming up and Reading 课件（58张ppt)

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Unit 4 Global Warming
Global Warming
Can you describe this
cartoon
From the cartoon, we
a draw a conclusion:
List
things that use energy
sources of energy
renewable / non-renewable
We depend on energy to do many things in our daily lives. Make a list of the things that consume energy in your home, school or any other places.
Lights, heating, television, pad, video recorder, computer, fridge, washing machine, hair dryer, air conditioner, cars….
Where does the energy come from
Energy sources: renewable and non-renewable sources.
Renewable sources: energy sources that never run out.
Non-renewable : energy sources that will run out one day.
Make a list of energy sources.
a coal power Station
(燃煤发电站)
non-renewable
coal
wind power
(风力)
renewable
Oil
(an oil refinery)
炼油厂
non-renewable
[ri'fain ri]精炼厂
solar-energy
renewable
nuclear energy (a nuclear power plant核电站 )
natural gas
Plant waste
hot springs (温泉)
the sea (tidal energy潮汐能 )
Water (hydro-electric power)
non-renewable
renewable
renewable
renewable
renewable
non-renewable
more sources of energy
renewable or
non-renewable
1. consume energy
2. greenhouse
3. greenhouse gases
4. the greenhouse effect
5. degree Fahrenheit
6. degree Celsius
7. atmosphere
8. fossil fuel
9. carbon dioxide
10. renewable source
11. non-renewable source
12. Natural resources
消耗能源
温室
温室气体
温室效应
华氏度
摄氏度
大气层
化石燃料
二氧化碳
可再生资源
不可再生资源
天然资源
Related words :
['f r nhait]
['selsi s]
Now that we have learned some sources of energy are non-renewable, What should we do with energy
--- We should save energy and thus reduce the emission (排放) of greenhouse gases.
a greenhouse
Pre-reading
What is a greenhouse made of How does it work
It is made of _____and plants can grow in it when it’s cold outside, because the glass______ the heat______ the sun and keeps it from _______.This makes the greenhouse
_____ ____and so the plants can grow throughout the cold period.
glass
traps
from
escaping
heat up
What function do greenhouse gases play
Greenhouse gases perform the same function as _________of a glasshouse.
They _____heat from the sun and keep the air s________the earth warm, which is called ___________effect.
温室效应
Do we need those gases
Without the “greenhouse effect”, what would happen
The earth would be about 33 ℃ cooler than it is.
the glass
trap
urrounding
the greenhouse
The Earth is Becoming Warmer
--But Does It Matter
1) How many paragraphs does the reading
2) What are the two graphs about
3) What skills are used in the four parts
Read the passage quickly (3’)
text consist of Please number them.
Fast-Reading
What are the two graphs about
The first graph shows the temperature
increase of one degree Fahrenheit between
1860 to 2000.
The second graph shows the carbon dioxide
content in the atmosphere from 1957 to 1997.
Main ideas of each part: skills
Part1
(1)
Introduce a debate over the issue of global warming.
raising a
question
Part2
(2-5)
How global warming
comes about.
giving
examples,
using graphs,
explanation
Part3
(6)
List two different attitudes
among scientists towards
global warming.
Part 4
(7)
It's up to readers to think and
decide whether people should
do something about global
warming or not.
giving examples, making contrast
leaving a question
Who writes this article
Sophie Armstrong of Earth Care
What rose about one degree Fahrenheit
The temperature of the earth.
Careful reading
Part1
(1)
Introduction of global warming.
2. ___________________________
1. ___________________
Part2
(2-5)
How global warming comes about
the burning of fossil fuels
human activity
Carbon dioxide
Methane
What are the
Greenhouse
gases
1.
2.
3.
Water vapor
Part3
(6)
What are the effects of global warming
a rise in the sea level
Severe storms, droughts, famines,
the spread of diseases, and the
disappearance of species
Make plants grow faster
1.The different ideas between Dr. Janice Foster & George Hambley
Dr. Janice Foster George Hambley
Carbon dioxide has caused the global temperature to __________. An increase of five degrees would be a ___________ and could be _____________. More carbon dioxide is a __________ thing,
which makes crops __________ more and will encourage ______________________________.
go up
catastrophe
very serious
positive
produce
a greater range of animals
A statement: We should do nothing about global warming.
Agree or disagree Why
Group -discussion:
Save energy: for example_______________
Traffic:
Recycle waste(bottle, can, plastic bags), circumstances permitting
Buy some energy-saving things
Plant trees
Try to advocate something about global warming…
New words and expressions:
come about:
be at random:
subscribe to:
quantities of:
go up:
result in:
be opposed to:
even if:
keep on:
on the whole:
on behalf of:
put up with:
发生；造成
随机的；任意的
同意，赞成；订购；捐献
大量的
上升；增长；升起
导致；造成
反对
即使；尽管
继续
大体上；基本上
代表…一方
忍受；容忍
Para 1:
…but it is a rapid increase when it is compared to other natural changes.
_____ with the size of the whole earth, the biggest ocean doesn’t seem big at all.
Compare B. When comparing
C. Comparing D. When compared
D
解析：when the biggest ocean is compared with the size of the whole earth, the biggest ocean doesn’t seem big at all.
Compare
vt. 1)比较; 对照
compare…with…表示“把……与……相比
(同类相比)” 如：
Compare your answers with your partners, and you may find the correct answer.
2) 喻为; 比拟
compare…to… 表示“把……比做……(异
类相比, 比喻)” 如：
A teacher is often compared to a candle.
知识拓展be compared to /with
与……相比, 一般在句子中作状语。
Compared to/with many women, she was indeed very fortunate.
come about: 发生, 造成, 相当于happen
How did this come about
With the reform and opening-up policy,
great changes have come about in our village.
come out 出现; 传开; 出版
come over 来访
come across偶遇
come to v. 想起；共计
When he came to and raised his head, he saw Barney.
2. So how has this come about and does
it matter
come about 是不及物短语。如：
Please tell me how the accident ___.
I am still in the dark.
A. came by
B. came out
C. came to
D. came about
D
Para 2: there is no doubt that the earth is becoming…
doubt 1) 作不可数名词, 作“疑惑; 怀疑”
①肯定句中doubt为n.多接whether
(一般不用if代替) 同位语从句。如:
There’s some doubt ________ he’ll keep his
promise. 他会不会信守诺言还难说。
She had her doubts ________ the new book
would sell well. 她怀疑新书是否会畅销。
whether
whether
①用于否定句或疑问句, 后接that引导的宾语
从句。如:
I don’t doubt ______ he is telling the truth.
我毫不怀疑他在讲真话。
Do you doubt ______ he will win the match
你怀疑他会赢这场比赛吗
②用于肯定句, doubt为动词，一般接whether 或if
引导的宾语从句。 如:
I doubt __________ we will make a profit out
of it. 我认为我们不可能从此事中获利。
We doubt __________ she will be persuaded.
我们不知道她会不会被说服。
whether/if
whether/if
that
that
强调句型：
it is/was +被强调部分+that/who + 其他
Para 2: It is (human activity) that has caused this global warming rather than a random but a natural phenomenon.
Para 4: It was (a scientist called Charles Keeling )who made accurate measurements of the amount of carbon dioxide in the atmosphere from 1957 to 1997.
Para 5: They also agree that it is (the burning of more and more fossil fuels) that has resulted in this increase in carbon dioxide.
强调句型的特征; 去掉it is/was和that/who仍是完整的一句话
1.是他做的这个决定。
2. 我们在学校门口遇到的是他。
3. Tom是在公园丢失的手表。/
4. 就是当Mary正准备睡觉的时候电话响了。
It is he who made the decision.
It was him that we met at the school gate.
It was in the park that Tom lost his watch.
It was when Mary was about to go to bed that the telephone rang.
Was it in the park that Tom lost his watch
Where was it that Tom lost his watch
1._______ find my wallet，Tom？
Where did you that B. Where was it you
C. Where have you D. Where was it that you
2.It is the ability to do the job ____matters，not where you came from or what you are.
A. one B. it C. what D. that
3. It was not ___she took off her glasses ___I realized she was a famous film star.
when, that B. until, that
C. until, when D. when, then
D
D
B
Para 3:
All scientists subscribe to the view that the increase in the earth’s temperature is due to the burning of fossil fuels …
模仿写句子：
所有老师都同意这个观点：课堂使用手机是由于学生们缺乏自制力。
All the teachers _________________using mobile phone in class ________a lack of self-control.
同位语从句
is due to
subscribe to the view that
subscribe to: ----n. subscription
1) 同意; 支持
我不同意这样的观点。
2)向（某个基金、项目或慈善事业）
捐款（多指定期捐款）donate…to
许多人为救灾基金解囊。
I don’t subscribe to such views.
救灾基金the relief fund
Many people subscribed a large sum of money
to the relief fund
3) (在文件等下面)签名
*你可以在文件上签下你的
名字么？
Can you subscribe your name ___ the document
4) 订阅(书籍等)
He subscribed to Reader’s Digest.
他订阅《读者文摘》。
to
Some byproducts of this process are called “greenhouse” gases, the most important one of which is carbon dioxide.
我们班有55个学生，其中40个是女生。
Our class consists of 55 students, 40 of whom are girls.
仓库(garage)里有些桌子，其中一些桌子是坏的
There are some desks in the garage, some of which are broken.
Para 3:
Without the “greenhouse effect”, the earth would be about 33 degrees Celsius cooler than it is.
含蓄虚拟语气：without, or, otherwise, but, but for…
与现在事实相反：
与过去事实相反:
would/might/could + v
would/might/could + have done
Without air, man _____ exist on the earth. A. couldn’t B. can’t C. may not D. won’t
Without your help, I ____ the exam last week. A. would have passed B. would have failed
C. will fail D. would fail
A
B
It means that more heat energy tends to be trapped in the atmosphere causing the global temperature to go up.
It means that…为宾语从句
倾向于/常常做某事：
照顾某人：
tend to do sth
tend (to) sb
“…causing the global temperature to go up.”现在分词作状语
现在分词：表主动，进行
tend to someone's needs
Para 6 do the correction below!
1.However, the attitudes of scientists towards this rise are complete different.
2. Unfortunate, he lost his money on his way home.
3. English is wide spoken around the world.
4. What your mother said is exact sensible.
5. He speaks English fluent.
exactly
widely
Unfortunately
completely
fluently
副词可以修饰动词，形容词，过去分词
Para 6:
There are those, like George Hambley, who are opposed to this view and believe that we should not worry about high levels of carbon dioxide.
who 引导的非限制性定语从句
believe引导宾语从句
oppose vt. 反对; 反抗 如：
He is strongly opposed to the plan.
他强烈反对这一计划。
oppose sth./doing sth. 反对某事/做某事
be opposed to sth./doing sth. 反对某事/做sth.
oppose后若接动词, 则用其doing形式，
而不用动词不定式。
oppose doing sth.= object to doing sth.
反对做某事

+n.
state +that从句
+wh-从句；
他已公开声明他会支持那项政策。
He has publicly ______ ____ _______ for the policy.
stated his support
我听见那位官员说不接纳Libya难民。
I heard the official ______(state) that they would
not accept the refugee from Libya.
In a good/bad/poor state 处于 好/不好/差的状况
v. 陈述, 声明；
n. 状况, 情况; 国家；
n. 状况, 情况; 国家；
state
New words and expressions:
come about:
be at random:
subscribe to:
quantities of:
go up:
result in:
be opposed to:
even if:
keep on:
on the whole:
on behalf of:
put up with:
发生；造成
随机的；任意的
同意，赞成；订购；捐献
大量的
上升；增长；升起
导致；造成
反对
即使；尽管
继续
大体上；基本上
代表…一方
忍受；容忍
课堂检测：
Find the words or phrases in the text to replace the underlined ones.
It is clear that global warming has become one of the most serious problems which human being have to face. But how does this happen
All scientists agree to the view that the earth’s temperature going up is because of the burning of fossil fuels , which can produce some greenhouse gases .
.
There is no doubt
come about
subscribe to
the increase in the earth’s temperature
due to
Revision :(Find the expressions in the text to replace the underlined ones.)
Greenhouse effect has a positive effect.
If there were no greenhouse effect,
the earth’s temperature would be much lower than it is . The problem is that when lots of extra carbon dioxide is in the atmosphere , more heat energy is likely to be trapped in the atmosphere
which can lead to the increase of the global temperature.
Without the greenhouse effect
huge quantities of
tends to
causing/resulting in
Some think the rise of the temperature would be a serious disaster , which can result in severe storms, floods , droughts , famine and extinction of species. Some are against it . Firstly, they think , it will benefit many animals . Secondly , warming will be not so severe and their consequences are not so bad.
are opposed to
warming will be mild with few bad environmental consequences.
a catastrophe
disappearance