人教版高中英语选修6unit4 Global warming up and reading课件（共31张PPT）

(共31张PPT)
Unit4 Global Warming

The Earth Is Becoming Warmer – But Does It Matter?
Work in groups ---list things as required :
1. Things that consume energy around us or at any other places.
2.Sources of energy
Warming up – I ( ３m )
Things that use energy
In a house
lights
television
cassette player
computer
fridge
stove
washing machine
hairdryer
video recorder
coal oil
natural gas
wind(power)
sun(solar energy)
water(hydro-electric power)
the sea ( tidal energy)
uranium(nuclear energy)
plant (biomass energy)
Things that use energy Sources of energy










Windmills, renewable.
What? Renewable?
Warming up – P 25
What? Renewable?
A coal power station , non-renewable.
What? Renewable?
An oil refinery(精炼厂), non-renewable.
What? Renewable?
A nuclear power station, non-renewable.
solar panels renewable
What? Renewable?
What? Renewable?
A hydro-electric dam, renewable.
Geothermal (地热的) Energy Plant
What is the greenhouse made of and used for?
What is this?
The sun.
Greenhouse
How does it work?
The air inside is warm because the glass traps the heat from the sun and keeps it from escaping. This makes the greenhouse heat up and so the
plants can grow
throughout the
cold period.
Questions
What is greenhouse effect?
green house effect
Carbon-dioxide
The leading gasses are:
Carbon-dioxide
Methane
Ozone(O3)
Nitrous Oxide(N2O)
Which greenhouse gases do you know?
As the earth is becoming warmer, there are many disasters.
tsunami
The rise of the sea level
floods
snow disaster
famines
the spread of diseases
droughts
Listen to the tape and find out the main idea of the passage:
Reading

Part 1(Paragraphs 1)


Part 2(Paragraphs 2-5)


Part 3(Paragraphs6)

Introduce a debate over the issue of global warming.
Describe how global warming comes about.
List two different attitudes among scientists towards global warming.
Part 4(Pa 7)
It’s up to readers to think and decide whether people should do something about global warming or not.
Choices.
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.
B
〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓
Reading IV (3m)
2. The author probably agrees that ________ A. actually global warming is good for mankind. 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.
D
What can we do about global warming?
Homework
A
B
What can we do about global warming?
Comprehending: P 27
1-2