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Reading V (4m)
The different ideas between Dr. Janice Foster & George Hambley Dr. Janice Foster George Hambley
Carbon dioxide has caused the global temperature to go up __________. An increase of five degrees would be a catastrophe ____________ and could be Very serious ______________.
4. What are the two graphs about?
→ The first graph shows the temperature increase of one degree Fahrenheit between 1860 to 2000. The second graph shows the carbon dioxide content in the atmosphere from 1957 to 1977. 5. What is the main topic of the article? → Global warming / the warming of the earth
Fossil fuels
What are fossil fuels?
• Ancient animal and plant material below the surface of the earth with a high carbon content, such as coal, oil and natural gas, which can be burnt to produce energy. Also known as nonrenewable energy because once they are used they have gone forever; they cannot be renewed.
Reading II-skimming (5m)
Read the passage carefully and judge whether the statements are true
F
Reading III-detailed reading (8m)
How many parts can the text be divided into? Tips: Part 1 (para __) Part 2 (para ___ to ___) Part 3 (para ___ to ___) Part 4 (para ___ to ___)
I learnt that global warming could have terrible effects on the environment.
….
Debate
A A : We shall do
something about global warming.
B
B: We shall do
nothing about global warming.
2.Sources of energy (ie. coal)
Things that use energy around us or at any other places:
In a house
Things that use energy
Sources of energy
lights television cassette player computer fridge stove washing machine hairdryer video recorder
Warming up – II ( 5 m )
Windmills, renewable.
What? Renewable?
A coal power station , non-renewable.
What? What kind? Renewable?
An oil refinery(精炼厂), non-renewable.
Unit 4 Global Warming
Save the earth!
Warming up – I ( ３m )
Work in groups ---list things as required :
1. Things that use energy around us or at any other places,( ie. light)
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.
coal oil natural gas wind(power) sun(solar energy) water(hydro-electric power) the sea ( tidal energy) uranium(nuclear energy) plant waster(biomass energy)
What? What kind? Renewable?
A nuclear power plant, non-renewable.
What? What kind? Renewable?
A hydro-electric dam, renewable.
What? What kind? Renewable?
• What are greenhouse gases? • What’s greenhouse effect?
Let’s see the following picture about it.
Reading
Global Warming
Reading I –scanning (5m)
Read the passage again to find out the answers to the questions in Ex.1
Pre-reading ( 3m )
What about the weather?
9℃ / 14℃
We need…
The sun.
How about the plants?
If lack of solar energy, the plants…
Greenhouse
Greenhouse gases!
Reading IV (3m)
Choices.
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1. Who found out the amount of carbon dioxide in the atmosphere from 1957 to 1977? B A. Dr. Janice Foster. B. Charles Keeling. C. George Hambley. D. Sophie Armstrong.
1.Who wrote the magazine article? What is the name of the magazine? → Sophie Armstrong, Earth Care. 2.What are the names of the three scientists mentioned in the article? → Dr Janice Foster, Charles Keeling, George Hambley.
Geothermal (地热的) Energy Plant
Non-renewable
• • • • Coal Oil Natural gas Uranium
Renewable
• Wind (wind power) • Sun (solar energy) • Water (hydroelectric power) • Plant waste (biomass energy) • Hot springs or geysers (geothermal energy) • The sea (tidal energy)
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3. The author probably agrees that ________ D 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.
Summary
Skim over the passage, and tell what you have learnt in class.
Try to talk in general terms rather than in details.
eg: I learnt that the earth is becoming warmer.
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