Unit 4 Global warming

The earth is becoming warmer- but does it matter?

We depend on energy to do many things in our daily lives. Can you make a list of sources of energy?

Warming up:

coal

Water power

Fossil oil

petrol

Solar energy

Wind power

Windmill 风车

underground heat 地热

大亚湾核电站

Nuclear energy

Which source is cleaner or healthier?

Which source is “renewable”?

Discussion:

Coal oil wind sun nuclear water underground

heat

√ √ √ √

√ √ √ √

Do you know what it is?

A greenhouse!

What is it used for?

Pre-reading:

What keeps the earth warm?

The earth’s atmosphere

What happen to our air nowadays?

Fast reading: ★ Who wrote the article? What‘s the

name of the magazine?

★ What are the names of the three scientists mentioned in the article?

★ What are the two graphs about?

★ Divide the passage into four parts and write down the main idea of each part? (pair work)

Fast reading: ★ Who wrote the article? What‘s the

name of the magazine?

★ What are the names of the three scientists mentioned in the article?

★ What are the two graphs about?

Sophie Armstrong. Earth Care 关爱地球 .

Dr Janice Foster, Charles Keeling, George Hambley.

The first graph shows the temperature increased by one degree Fahrenheit between 1860 and 2000; The second shows the carbon dioxide content increased from 1957 to 1997.

Main ideas of each part

Part1 Part1 (1)(1) The background of this article.

Part2Part2(2-5)(2-5)

Explanation about how global warming comes about.

Part3Part3(6)(6)

Two different attitudes among

scientists towards global warming.

Part4Part4(7)(7)

Two choices of dealing with this problem.

Detailed reading: (use your own words)Name Ideas about global warming

Dr Janice Foster

Charles Keeling

George Hambley

Ideas about global warming

1)Carbon dioxide has caused the global temperature to __________.

2)An increase of five degrees would be a ___________ and could be _____________.

Dr Janice Foster

go up

catastrophevery serious

Ideas about global warmingGeorge Hambley

More carbon dioxide is a __________ thing,which makes crops __________ more and will encourage ______________________________.

positiveproduce

a greater range of animals

Ideas about global warmingCharls Keeling

The carbon dioxide content of the atmosphere went up from 315 parts to around 370 parts per million.

Finish comprehending exercise 2 !

Check the answers:

Comprehending:

T T F T T F

What are the effect of global warming?

The sea level to rise 海水上涨

Severe storms 风暴

Droughts 干旱

Famines 饥荒

The spread of disease 疫病

The distinction of species 物种毁灭

negative effect 消极作用

What are the effect of global warming

Make plants grow fasterCrops will produce moreEncourage a greater range of animals 促使动物种群的丰富

positive effect 积极作用

After we learn the article, you are required to answer the questions:

1.What is global warming? And green house effect?

2. what is green house gases?3.What is the attitudes of the

scientists?4.What are your going to do in

the future?