人教高中英语选修六Unit4 Global warming Reading The earth is becoming warmer课件(19张PPT)

greenhouse
effect
gases
global warming
The Earth Is Becoming Warmer
--- But Does It Matter?
The Earth Is Becoming Warmer
Tell the fact about global warming
--- But Does It Matter?
compare different ideas
Read the opening paragraph
1. Who wrote the article?
2.What is the name of the magazine?
Skimming
3.What is the topic sentence of the text?
So how has this come about and does it matter?
The process of how global warming develops and people's different attitudes are declared in the text.
1. Para 2-4
how has this come about
Careful reading
1. What is Graph 1 about?
The larger the temperature difference, the more heat is transferred.
conclusion: the earth is becoming warmer
random phenomenon
natural phenomenon
Careful reading
2. reason?
the burning of fossil fuels
byproduct
greenhouse gases
carbon dioxide
Para 3
coal natural gas oil

Careful reading
3. greenhouse effect?
Para 3
Careful reading
4. What's the problem?
huge quantities of extra carbon dioxide


more heat energy tends to be trapped


the global temperature to go up
Para 3
Careful reading
1. What is Graph 2 about?
Conclusion: the levels of CO2 have increased greatly
result in
the burning of fossile fuels
over the next 100 years
as low as 1 to 1.5 degree Celsius
as high as 5 degree Celsius
2. Para 2-4
how has this come about

different attitudes
Careful reading
Dr Janice Foster
George Hambley
The _____ that the temperature increases by five degrees would be a ___________ and it could be very _______.
trend
serious
catastrophe


Any warming will be ____ with few bad_____________________________. It is actually a ________ thing.
mild
environmental
positive
consequences
Careful reading
catastrophe
? a rise of several meters in the sea level?
? severe storms,
floods, famines
the spread of diseases disappearance of species
Careful reading
positive
? encourage a greater range of animals
? make plants grow quicker
make crops produce more
Careful reading
greenhouse gases build up
Even if we start ... , the climate is going to keep on warming.
Para 6
书本27页 练习2
Title

______________________________________________
The opening para.: raising a question
graph 2
Para 2,3:________

__________________________
Para 4,5
______________
Para 6: conclusion
graph 1
The earth is becoming warmer
-But does it matter?
causes
Giving examples, using graphs, explanation.
different attitudes
Discussion
We should start from every little bit to fight against global warming.What can we do?
walk or ride bikes insteading driving
plant trees
turn off the lights and fans if not use
spread the knowledge of global warming