人教版（新课程标准） 选修6 Unit 4 Global warming Reading 课件-(48张ppt)

(共48张PPT)
Unit 4
Global warming
Reading
选修六
Pre-reading
THE EARTH IS BECOMING WARMER BUT DOES IT MATTER
Reading
Are the risks too great
So can you predict the future of the
global warming
1) How many paragraphs does the reading
2) Make a division of the text.
Read the passage quickly (3’)
text consist of Please number them.
Fast-Reading
Main ideas of each part:
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.
Part3
(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
Get to know global warming
What ideas/concepts about global warming are conveyed by the author
green house
greem house effect
real meaning of the rise of the temperature by one degree
different attitudes towards global warming
1. Have you ever seen a greenhouse
is made of glass
used for growing plants, especially during cold weather.
2. How does the greenhouse work
The air inside was warm because the
glass traps (挡住, 吸收) the heat from the
sun and keeps it from escaping (逃跑).
This makes the greenhouse heat up (热量
上升) and so the plants can grow
Throughout (在……期间) the cold period.
3. What are Greenhouse Gases
Methane
4
Ozone
5
1
Carbon dioxide
2
Water vapor
1
1
Nitrous oxide
3
4. Greenhouse Effect
Global warming
Greenhouse gases trapped the heat from the sun, which causes the temperature of earth goes up.
Greenhouse effect
5. the function
of
the greenhouse effect
It is similar to the function of a quilt: keep the earth at a certain temperature.
But if there is added carbon dioxide,the temperature will rise.
6. The cause
of
the increase of the temperature
human activities:
a. burning of fossil fuels
b. destruction of the green plants
7. Why does the increase of one degree Fahrenheit astonish the scientists so much
It shows that the rise of the temperature in recent years is speeding up.
It can bring disastrous effects on human beings.
the two graphs
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.
from around 315 parts per million
to around 370 parts per million
Huge quantities of extra carbon dioxide
From 1957 to 1997
8. the disastrous effects of global warming
a rise in the sea level
Severe storms, droughts,
famines, the spread of diseases,
and the disappearance of species
9. What do the three scientists think about
global warming
believes it is the burning of more
and more fossil fuels that is resulting
in a big increase in carbon dioxide.(harmful)
Dr. Janice Foster
Charles Keeling
George Hambley
thinks the effects of global
warming could be very harmful
thinks global warming will be
mild with few bad environmental
consequences.(not harmful)
10. The author’s
attitude towards
global warming
Indifferent
Subjective
Objective
uninterested
What we should do to
protect our earth
Discussion:
1. Reduce the burning of fossil fuels
2. Plant trees
3. Use bags that can be recycled
…
It is a rapid increase when compared
to other natural changes.
compare vt. 1)比较; 对照
compare…with…表示“把……与……相比
(同类相比)” 如：
Compare your answers with those at the
back of the book to see if they are right.
把你的答案同书后面的答案对照一下,
看看是否正确。
Language points
2) 喻为; 比拟
compare…to… 表示“把……比做……(异
类相比, 比喻)” 如：
Man’s life is often compared to a candle.
人生常被比为蜡烛。
My handwriting can not be compared
with my father’s.
我的书法不能与我父亲的相比。
Shakespeare compared the world to a
stage. 莎士比亚把人世比做舞台。
知识拓展
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
你能告诉我事情是怎么发生的吗？
Can you tell me how the accident came
about
随着电的使用, 种种大变化发生了。
With the use of electricity, great changes
have come about.
come out 出现; 传开; 公开
come up 发生、举行; 出现
2. So how has this come about and does
it matter
3. There is no doubt that….
doubt 1) 作不可数名词, 作“疑惑; 怀疑”
①肯定句中doubt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
②否定句中doubt多接that同位语从句。如:
There is no doubt ______ they will ask you
for help. 毫无疑问, 他们会请你帮忙的。
I have no doubt ______ you will succeed.
我毫不怀疑你会成功的。
2)作及物动词常用于下列句型中, 作“怀疑;
不能肯定; 不大相信”解, 一般不用进行时态。
that
that
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, 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
[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。如：
Some researchers believe that there is no
doubt ___ a cure for AIDS will be found.
A. which B. that C. what D. whether
B
5. subscribe to
1) 同意; 支持
I don’t subscribe to such views.
我不同意这样的观点。
2) 对……捐款
Many people subscribed liberally to
the relief fund.
许多人为救灾基金慷慨解囊。
3) (在文件等下面)签名
He subscribed his name to a petition.
他在请愿书上签名。
4) 订阅(书籍等)
He subscribed to Reader’s Digest.
他订阅《读者文摘》。
7. quantity n. 数量; 量
“a large/small quantity of +不可数名词
和可数名词复数”表示“大量的/少量的……”,
也可以用“large/small quantities of +
不可数名词或可数名词复数”来表达。
用法归纳: a quantity of 大量的
quantities of 大量的
There is a small quantity of water left
in the bottle. 瓶子里还剩下少量的水。
She has quantities of good clothes.
她有许多好衣服。
特别提示
a quantity of 后可接不可数名词或
可数名词的复数形式。当它修饰名词
作主语时, 谓语动词用单数;
而quantities of后同样可接不可数名词
或可数名词的复数形式, 但谓语用复数。
amounts of + 不可数名词充当句子
的主语时, 其谓语动词用复数。
12. oppose vt. 反对; 反抗 如：
I am opposed to going shopping with others.
我反对与他人一起外出购物。
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/做某事
oppose后若接动词, 则用其动名词形式，
而不用动词不定式。
oppose doing sth.= object to doing sth.
反对做某事
The young man opposed/objected to
turning to his parents for help.
这个年轻人反对向他的父母求助。
易混辨析
oppose (尤指采取行动)反对, 反抗(某事)
be opposed to 一方面相当于be against
“反对”; 另一方面相当于be opposite to
“相对”。
13. consequence n. 结果,后果,影响
in consequence 因此
as a consequence 结果
as a consequence of 由于……的结果
It rained yesterday and in consequence the match was canceled.
He studied hard, and in consequence he passed the exam.
15. range v. 排列, 使成行; 偏袒, 站在……的方面
n. 范围(尤指从……到……各种种类, 可供选择的
范围等, 可加不定冠词); 排列
beyond the range of… 超越……的范围
out of one’s range 某人达不到的
这家商店商品品种多。
The shop keeps ____________________.
常可用于: 1) 被动结构 2) range oneself；
3) range from… to … / between…and …
从……到……不等
a wide range of goods
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.
uantity
ange
onsequence
er
根据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。
II. 根据句意, 选择适当的单词或短语填空
1. climate; weather
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
I’ve never ___________ anyone quite
like her before.
b. Please tell me how the accident
__________. I am still in the dark.
climate
weather
come across
came about
3. quantity; quality
a. Much of the land was of poor ______.
b. Buy vegetables in small __________,
for your immediate use.
4. result in; result from
The accident ___________ the death
of three people.
b. His failure ______________ not
working hard enough.
quality
quantities
resulted in
resulted from
5. glance; glare; stare
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.
glared
stared
glanced
Thank You!