课标人教实验版高二 Module 6

Unit 4

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.

Main ideas of each

part

Writing techniques

( Paragraph 1 )

Introduce a debate

over the issue of

global warming.

Raising a question

Main ideas of each

part

Writing techniques

(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.

Scientists Opinion

Janice Foster

◆ We need 1______ like carbon dioxide, methane and water vapour, but if we add huge 2__________ extra carbon dioxide to the atmosphere by burning fossil fuels, it will cause the 3________________ to go up.

gases

quantities of

global temperature

Scientists Opinion

Janice Foster

◆ 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 Celsius.

◆ An increase of five degrees would be a 4____________ .catastrophe

Scientists Opinions

George Hambley

◆ Believes that we shouldn’t worry about 5__________ of carbon dioxide in the air .

◆ Predicts that any warming will be mild with few bad environmental 6___________ .◆7_______that more carbon dioxide is actually a 8________ thing, which will make life for human beings better.

high levels 　

consequencesStates

positive

Choose the best answers.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.

A

2. 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

Comprehending

浓度单位

• Glance quickly at the magazine

article and answer the questions.

1.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.

2. 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. 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 warming

global warming

2. 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 effect

green 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?