人教版高中英语选修六课件：B6-U4-P2

Dr. Janice Foster Carbon dioxide has caused the global temperature to go up __________. An increase of five degrees would be a catastrophe and ___________ could be very serious _____________.
Unit 4 Global Warming
What is the weather like today?
extreme weather events
drought
flood
typhoon
Tsunami
high temperature
What has caused the extreme climate?
Part2 (2-5)
How global warming comes about?
1. ___________________ human activity
Greenhouse 2. ___________________________ the burning of fossil fuels effect What are the Greenhouse gases?
What are the two graphs about?
The first graph shows therelationship temperature What’s the increase of one degree the Fahrenheit between 1860 to 2000. between two factors The second graph the carbon dioxide and shows global warming? content in the atmosphere from 1957 to 1997.
So we don’t worry about global warming…
Positive effects
Post-reading
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.
Discussion
As a student, what can you do about it?
What we can do?
Assignment
Prepare the language points of
this passage and underline the important ones.
4. Natural gas is not a greenhouse gas
but a fossil fuel.
burning fossil fuels.
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6.People accept Charles Keeling’s data because he took accurate measurements. 7.Flooding could be one of the effects of future global warming. 8.George Hambley believes scientists are just guessing about the effects of global warming.
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.
After remembering the vocabulary,
do the exercise on Paቤተ መጻሕፍቲ ባይዱe 28.
Group-work:
Let’s have a competition:
How much do you know about global ★ ★ ★ ★ warming?
（Finish Ex2 on Page 27. True or False?）
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1. The temperature temperature last century increased 1.The last century didn’t much. increase much.
Greenhouse Effect
Greenhouse gases(CO2) trap the heat from the sun, which causes the temperature of earth to go up.
Global warming
Task 1: Skimming
Sophie Who wrote the Armstrong article? What is the main Global warming/ idea of the the warming of the magazine? earth. What are the Dr Janice Foster, names of the 3 Charles Keeling, scientists? George Hambley
Group 2
Group 3 Predict the global warming will be mild and positive
Made accurate measurements of the amount of CO2
Task 3 Scanning The organization of the article:
Task 2: Comparing The Outline of different opinions
Dr Janice Foster Charles Keeling George Hambley
Group 1 Introduction of Greenhouse gases and Greenhouse effect
Group Work
1 2
We shall do something about global warming.
We shall do nothing about global warming.
Debate
Possible effects:
1. cause the sea level to rise 2. the spread of Negative effects diseases 3. disappearance of species So we should : 1. Reduce the burning of fossil fuels 2. Use bags that can be recycled … 1. make plants grow faster 2. crops will produce more 3. a greater range of animals 4. make life better
Introduction
Conclusion
Para. 1
The topic
Para.6-7
Body Para. 2-5
Careful reading
Part1 (1)
Introduction of global warming
Who writes this article? Sophie Armstrong of Earth Care Where does this article most probably come from? A. Newspaper B. Novel C. Magazine
3.Janice Foster believes that global warming is caused by burning fossil fuels.
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F 4.Natural gas is a greenhouse gas. T
5.Carbon dioxide is a byproduct of
1. Carbon dioxide 2. Methane 3. Water vapor
Part3 (6-7)
Different attitudes towards the effects of global warming
George Hambley More carbon dioxide is a positive __________ thing, which makes crops produce __________ more and will encourage a greater range of _____________________ _________. animals
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.
global warming will be.
warming will be.
• Try to sum up the main idea of the passage within 30 words. • The temperature of the earth rose _____________________ about one degree Fahrenheit during the 20th century. However, the scientists ________ have different ideas on whether it __________ matters when the earth is becoming __________. warmer
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9. George Hambley thinks that more
9.George Hambley is worried about the carbon dioxide is a positive thing and effects of carbon dioxide on plant growth 10.It isis clear what the effects of global of it It will make plants grow faster. 10. unknown what the effects
2. Not everyone believes global 2.Everyone believes that that global
warming is caused by the activities of warming is caused by human activities. humans.