Unit 4

---warming up and reading

Global warming

energy sources

We depend on energy to do many things in our daily lives. For example, energy lights our cities and heats our buildings. Make a list of things that use energy in your home, in your school, or any other places you can think of.

stove light things

that use energy in

your home

micro-wave oven cassette player

heating

television

hairdryer

video player

fridge

computer

washing machine

stove

Wind energy is used as power to

produce electricity .

Windmills

where electricity is produced by burning coals.

The coal power stations

in which oil is refined and made pure.

The Oil Refineries

a facility designed to convert nuclear energy into electricity.

A nuclear power plant

on the roof of a house on a bright sunny day are used to collect solar energy, making your house warm or heating your water.

Solar panels

are used to keep back water and raise its level for irrigation or for producing electricity, etc.

The Hydro-electric dams

Guess it!

Uranium Ore (铀矿石 ) The element uranium does not occur in pure form

in nature but is found in minerals such as carnotite（钒钾铀矿） , pictured here.

What source of energy?

Geysers(间歇泉 )

Geothermal (地热的 ) Energy Plant

An energy source is “renewable” when supplies of it never run out and “non-renewable” when one day they will run out. Which energy sources on your list are renewable and which are non-renewable?

Discuss

Things that use energy in your home

Sources of energy Renewable/non-renewable

light

heating

televisioncassette player

video playercomputer

fridge

stove

washing machine

hairdryer

coal

oil

natural gas

wind (wind power)

sun (solar energy)

uranium (nuclear energy)

water (hydro-electric power)

plant waste (biomass energy)hot spring or geysers (geothermal energy)

the sea (tidal energy)

non-renewable

non-renewable

non-renewable

renewable

renewable

non-renewable

renewable

renewable

renewable

renewable

What are these buildings made of and what is their purpose?

They are made of glass and plants can grow in it when it is cold outside.

How does it work?

The glass traps the heat from the sun, making the air warm so that plants can grow better.

Greenhouse gases!

What’s greenhouse gases effect?

Greenhouse gases perform the same function as the glass in a greenhouse --- They trap the heat of the sun and keep the air surrounding the earth warm.

It is called the greenhouse effect.

The Earth Is

Becoming Warmer –

But Does It Matter?

Fast Reading

Glance at the article and answer the question.

It has a title, a first paragraph

that runs across the page and is

in bold, the main text in two

columns, graphs/diagrams, two

quotes.

What is the structure of a magazine like this and how is the text organized?

Reading comprehension

Read the article again and finish

comprehending on page 27

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.

1.Who wrote the magazine article? What is the name of the magazine?

3.What do they think about global warming?

Do they agree with one another?

There are some very different

attitudes among scientists

towards this issue.

Some think the effects will be

terrible, while some others

believe that we should not worry

about it.

4.What are the two graphs about?

Graph 1 shows the temperature increase of one degree Fahrenheit between 1860 to 2000.

Graph 2 shows the carbon dioxide content in the atmosphere from 1957 to 1997.

Graph 1:

Graph 2:

5.What is the main topic of the article?

Global warming / The warming of the earth.

1.The temperature last century didn’t increase much.

2.Everyone believes that global warming is caused by the activities of humans.

3.Janice Foster believes that global warming is caused by burning fossil fuels.

4.Natural gas is a greenhouse gas.

5.Carbon dioxide is a byproduct of burning fossil fuels.

6.People accept Charles Keeling’s data because he took accurate measurements.

Read the article carefully. Tell true or false.

T

T

F

TT

F

Detailed-Reading

Read the article in details and

finish the following task.

listening

1. Who found out the amount of carbon dioxide in the atmosphere from 1957 to 1977?A. Dr. Janice Foster. B. Charles Keeling.C. George Hambley. D. Sophie Armstrong.

Listen to the reading passage and do some choices.

2. "But there are some very different attitudes among scientists towards this issue.”“issue" here means the same as the one in___ .A. I bought the new stamp the day of its issue. B. They are talking about one of the key issues in the election campaign.C. The government is expected to issue a statement about the election.D. The magazine has 12 issues each year.

3. The author probably agrees that ________A. actually global warming is good for man.B. we should do nothing about the global warming.C. catastrophes will happen if the globe keeps on warming.D. a lot remains to be found out about the effects of global warming.

Questionnaires -I

1.Does Sophie Armstrong support a clear opinion?

2.Does George Hambley believe that we should worry much about the global warming?

No. he doesn’t state it clearly.

No, he doesn’t.

3. How has the global warming come about?

①Human activity--- burning of fossil fuels.

② Greenhouse effect--- greenhouse gases--- we need those gases.

③ Huge quantities of extra carbon dioxide---from 1957 to 1997---from around 315 parts per million to around 370 parts per million.

4.What are the effects of global warming?

④ Encourage a greater range of animals.

①The sea level to rise.

② Severe storms, droughts, famines, the spread of diseases, and destruction of species.

③ Make plants grow faster. Crops will produce more.

main idea

Part1 (para1)

Introduce a debate over the issue of global warming

Part 2 (para2)

Part 3 (para3-8)

Part 4 (para9)

Illustrate how global warming comes about

List two different attitudes among scientists towards global warming

It’s up to readers to think and decide whether people should do sth about global warming or not

4 parts

1. What is the purpose of the paragraph that is in bold?

To introduce the topic.

To illustrate(阐述 ) points by providing evidence.

2. What are the diagrams for?

Questionnaires -II

3. Why are there two quotes?

Because they are important or interesting points. Their aim is to attract your attention and to make you read them, and therefore to make you interested enough to read the whole article.

It functions as a conclusion by asking the reader to reflect on the major theme of the text and to predict what might happen in the future.

4. What is the purpose of the last paragraph of the article?

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 __________ and will encourage ____________________.

go up

catastrophe

very serious

positive

produce

a greater range of animals

Homework Prepare the language points of

this passage and underline the

important ones.

Review the reading passage.

Finish useful words and

expressions.