unit 4 global warming warming up &reading[上学期]

课件21张PPT。Oh, it’s so hot!Unit 4 Global Warmingenergywind powerpetrolsolar energyWarming upcoal…natural gaswater powerrenewable energy: Supplies of the energy source
never runs out.The supplies of energy source
will run out one day. energy non-renewable energy:
Large areas of ice has been melting.Polar ice has been decreasing by 1% per year since 1979. ????
19792000The North PoleReadingThe Earth Is Becoming Warmer
-----But Does It Matter?Glance quickly at the passage and answer:
1. Who wrote the magazine article?
2.What’s the topic of the passage?
Sophie ArmstrongGlobal warming.Task I fast reading
Part 1 _____ （the beginning¶1）

Part 2 _____ (para2-para9)
Part 3 _____ (para10)The influence of global warming.
One point of view: it would cause a catastrophe.
What can we do about global warming.
Putting forward a question: what has caused global warming?
The other point of view: it wouldn’t cause many bad consequences.DACBE①②Task II Check homework. B1. Student TimesOrganization
Listen to the tape part by part. Are the statements true or false, and why?
1.The temperature last century didn’t increase much.
2. Everyone believes that global warming is caused by the activities of humans.Task III careful readingPart 1 para1 1.The temperature last century didn’t increase much.
That doesn’t sound very much to you or me but it is a rapid increase compared to most natural changes.eg 1 Compared to other performances, this one is more creative.
=compared with 与…相比(作状语)
eg 2 Poets often compare love to a rose.
compare … to… 把…比作…He is thin but healthy.
Fossil fuels are useful but they’re non-renewable.F2. Everyone believes that global warming is caused by the activities of humans.
FThere is a fierce debate over…3. Janice Foster believes that global warming is caused by the 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.
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.
9. George Hambley is worried about the effects of carbon dioxide on plant growth.
Part 2 para2-para93. Janice Foster believes that global warming is caused by the burning fossil fuels.
4. Natural gas is a greenhouse gas.
5. Carbon dioxide is a byproduct of burning fossil fuels.
TSome byproducts of burning fossil fuels are called “greenhouse” gases.FT6. 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.
9. George Hambley is worried about the effects of carbon dioxide on plant growth.
TTTFThey also believe it is the burning of more and more fossil fuels that is resulting in this increase in carbon dioxide. (para5)
result in : lead to; cause
result in result from
Our hard work surely will result ___success
in the coming sports meet.
The serious pollution results____ human activities.fromin
10. It is clear what the effects of global warming will be.No one knows what the effects of global warming will be.Part 3 (the last)
Global warmingThe Day After Tomorrow What do you think of the effects of global warming will be
? Post-readingDiscuss in groups Dongguan is crowned with the title 2006 international "City of Garden”. Are you satisfied with its present environment? If you were the mayor, what actions would you take to improve it?Homework Read the passage again and write a composition containing two parts.
Part 1: summary of the passage (60 words or so)
Part 2: your opinion about what the effects of global warming and suggestions.A beautiful world needs both you and me.Thanks for your listening