Book 6 Unit 4 Global warming 学案

Book 6 Unit 4 Global warming导学案

Period 1 Vocabulary

一、重点单词。

1、_____ n. 承诺；交托 ____ vt.犯罪；承诺

2、___ vt.陈述；说明 ____ n.国家

3、_______ n. 生长；增长_____v i. 生长

4、______ n. 生存；存在 ______vi.存在

5、_______ n. 贡献 ______ vt.捐助

6、_____ n. 分歧；不一致 _____ vi.不同意

7、_________ n.结果；后果；影响

8、________ n. 种类；范围

9、_________ n. 环境；情况 10、______ adj. 平均的；普通的；普遍的11、________ vt. 消费；消耗 12、_______adj. 温和的；温柔的

13、_______ vi.照顾；趋向 &vt.照顾；护理 14、______ vt. 拥护；提倡；主张

二、重点短语。

1、_________ 同意；订阅

2、__________ 发生；造成

3、________ 大量的

4、_________ 与……相比

5、__________导致

6、__________ 反对

7、_________ 继续

8、_________ 涨价；上涨

9、__________代表10、________ 大体上；基本上 11、_______ 代替 12、__________有影响

13、_______ 浏览；扫一眼 14、_________ 容忍 15、__________减少

三、练习。

A. 根据括号里单词的释义，用其正确形式填空。

1.These __________ (现象)are most serious in the area.

2. Before Jack left the company , he ________ （陈述） his problem.

3. Do you ________（同意） to her pessimistic view of the situation of the economy?

4.When did this word come into ______________?（存在）

5.More and more fossil fuels have ________in （导致）this increase in carbon dioxide.

6.I am doing a project on _______ of my school about global warming.

7. We do not have to _________________ （忍受）pollution.

8. He ________ at today’ s newspaper and walked out.(瞥了一眼)

9. On __________(平均), how much do you earn per month?

B. 单项选择。

1.The prices of beer ___ from 50 cents to ＄4 per liter during the summer season.

A. found

B. ranged

C. separated

D. differed

2. Ann is careless sometimes, but ____, she is a hardworking student.

A. to tell you the truth

B. believe it or not

C. that is to say

D. on the whole

3. There are many inconveniences you have to _____ when you are camping.

A. put up with

B. put up

C. put off

D. put away

4. _____ all my family, I sincerely thank you for what you have done for us.

A. On behalf of

B. Represent

C. Stand for

D. Instead of

5. You can go out, ______ you promise to be back before 11 o’clock.

A. as far as

B. so far as

C. when

D. as/so long as

6. Don’t expect too much of him. After all, he i s a child of ____ intelligence.

A. slight

B. average

C. strange

D. different

7. Under no circumstances, ____ to move to a new place far away from her workplace,

because it isn't for her family and herself.

A. Lily will agree

B. will Lily agree

C. Lily will disagree

D. will Lily disagree

8. He offered me some coffee with which to ____ my spirit.

A. renew

B. refresh

C. recreate

D. reshape

9. The woman stayed at home to ___ her very sick child.

A. tend

B. educate

C. refresh

D. advocate

Period 2 Reading

Task 1．Skimming

(1)Who wrote the magazine article？What is the name of the magazine?

_____________________________________________________________

(2)What are the names of the three scientists mentioned in the article？Do they agree with one another?

_____________________________________________________________________ (3). What do they think about global warming? Do they agree with one another?

_____________________________________________________________

Task 2.Scanning

(1).How much did the temperature rise in the 1900s?

A. One degree Fahrenheit

B. One Celsius

C. Two degrees

D. Thirty degree Celsius

(2).What causes the temperature of the earth to increase?

A. Cutting trees

B. Wasting the farmland

C. Running out of the river water

D. Burning fossil fuels

(3).Who accurately measured the amount of carbon dioxide in the atmosphere from 1957 to 1997?

A. Dr. Janice Foster.

B. Fahrenheit.

C. Charles Keeling

D. George Hambley

(4). George Hambley believes that more carbon dioxide is actually_____.

A. a bad thing

B. a dangerous thing.

C. a comparative thing

D. a positive thing

(5).What is the main idea of this passage?

A. Global warming.

B. Flood phenomenon.

C. Making methane.

D. Making greenhouses

Task 3．Careful reading

Read the passage carefully and judge whether the statements are true(T) or false(F)．

①Janice Foster believes that global warming is caused by the burning fossil fuels.()

②Natural gas is a greenhouse gas.()

③Carbon dioxide is a byproduct of burning fossil fuels.()

④People accept Charles Keeling's data because he took accurate measurements.()

⑤Flooding could be one of the effects of future global warming.()

⑥George Hambley believes scientists are just guessing about the effects of global warming.()

⑦George Hambley is worried about the effects of carbon dioxide on plant growth.()

⑧It is clear what the effects of global warming will be.()

Task 4．Structure analyzing

Part Main idea

Part1(Paragraph__) A It's up to readers to think and decide whether people

should do something about global warming or not.

Part 2(Paragraphs __to __) B To illustrate how global warming comes about.

Part 3(Paragraph __) C To introduce a debate over the issue of global warming. Part 4(Paragraph__ ) D To list two different attitudes among scientists towards

the global warming

Task 5 Post-reading.

The earth is becoming warmer and it is human activity _______1 has caused this global warming .All scientists_________2 to the view that the increase in the earth’s temperature is _________3 to the burning of fossil fuels. Some byproducts of this process, especially carbon dioxide, are called ‘greenhouse’ gas es. Some small amounts of gases in the atmosphere_________4 heat from the sun and therefore warm the earth .So we need those gases .However, the problem begins when we add huge

_________5 of extra carbon dioxide into the atmosphere. It caused the global temperature to __________6 up. A scientist __________7 Charles Keeling made accurate measurements of the amount of carbon dioxide in the atmosphere. But how high will the temperature _________8 go?_________9 if we start reducing the amount of carbon dioxide and other greenhouse gases, the climate is going to

_______10 on warming for decades or centuries. No one knows the effects of global warming.

Period 3 Grammar

I. 句式讲解

1. 强调句型的基本结构形式

It is/was + 被强调部分+ that + 句子的其余部分

当被强调部分是人时that也可以换成who。

原句：Professor Liu teaches us English this year.

强调主语：It is Professor Liu who teaches us English this year.

强调宾语：It is English that Professor Liu teaches us this year.

强调状语:It is this year that Professor Liu teaches us English.

2. 强调句型的特点

去掉It is (was) 及that (who) 后，在不添词、不减词后，剩下的部分能组成一个完整的句子。这也是判断一个句子是否是强调句型的依据。

3. 强调句型的时态

如果原句中谓语动词使用的是现在或将来时间范畴的时态（一般现在时、现在进行时、现在完成/现在完成进行时、一般将来时、将来进行时、将来完成时等），用___________________。

如果原句中谓语动词为过去时间范畴的时态（一般过去时、过去进行时、过去完成时、过去将来时等），则用___________________。

4. 强调句型的一般疑问句式

Is/Was it + 被强调部分+that+句子的其余部分。

_____________________________________. 是刘教授今年教我们英语吗?（强调句)

5. 强调句型的特殊疑问句式

特殊疑问句+is/was it+被强调部分+that+句子的其余部分。

_____________________________________. 今年教我们英语的是谁？

_____________________________________. 刘教授今年是教我们什么的？

6. not…until句型的强调句型

当被强调的是not…until句型时，应将not置于until之前，主句由否定句改为肯定句。

如：He didn’t leave until 11 o ’clock.他直到11点才离开。

_____________________________________.（强调not until时间状语）

II. 练习

A.对划线部分进行强调。

(1) The greenhouse effect gives the earth’s surface the average temperature of 15℃.

_____________________________________________________________________.

(2) In the years ahead, the level of the sea could rise by several meters because of global warming.

____________________________________________________________________.

(3) In the future outer space might provide us with new energy sources.

_____________________________________________________________________.

B. 单项选择。

1. It was this village ___ I was brought up.

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. which

3. 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 which

5. 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. after

7. It was not until 1920 ____ regular radio broadcast began.

A. while

B. which

C. that

D. since

8. ___ is the fact that English is being accepted as an international language.

A. There

B. This

C. That

D. It

9. 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

10. I hate ____ when people talk with their mouths full.

A. it

B. that

C. these

D. them

Period 4 Writing

1．Ask the students to make a poster for their school that tells students various ways they can reduce the amount of carbon dioxide in the air. Tell students to give the poster a heading that will be eye－catching and will make others want to read it.

Suggested answer：

Fight global warming

Cut down on energy.Cut down on carbon dioxide.

●If not using an electrical item，turn it off.

●If you suddenly feel cold，don't turn the heat up，put on a jacket instead.

●Walk or ride a bike and save fossil fuels.

●Recycle paper，cardboard and newspapers.

●Buy products made from recycled materials.

●Buy energy－saving products like low energy light bulbs.

●Plant trees to absorb CO2.

●Tell your friends about global warming.

Every effort counts！

2．Ask students to choose a topic from the list that they feel strongly about. Make notes on the topic using headings similar to the table in the reading task. Use the passage as a model.

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)．

A sample version：

The Environmental Effects of Fossil Fuels(矿物燃料) 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.

积累写作词汇：

1、there is no do ubt that…：毫无疑问

2、result from：起因于

3、because of：因为；由于

4、result in：导致

5、be to blame for:应该为……负责任；应为……受责备

6、spare no effort to do sth.:不遗余力做某事