请双击打开名为的网页,这样就可浏览本课件.
本课件题材是:
北京师范大学出版的<普通高中英语课程标准实验教科书 第八模块
unit 22 lesson 1 Global warming.
制作人:广东省佛山市顺德杏坛中学 钟小汝(共7张PPT)
Gist reading : Skim the text and match the heads with the paragraphs.
1.Draw readers’ attention to the topic by asking questions.
2.What should human beings do.
3.What is global warming.
4.Consequences of global warming.
5. What cause global warming
Para 1.
Para 2.
Para 3.
Para 4.
Para 5.
2. Scan the text for these words and work out the meanings
environmentalist, radiate, atmospheric
concentration , release, insignificant, consequence, dramatic, energy-efficient
Environmentalist : a person who is concerned with protecting the environment.
Radiate: send out in all directions.
Atmospheric concentration: the amount of such gases in the atmosphere.
Release: give out , let out
2. Intensive reading :
Read the text and answer these questions. If necessary, give reasons for your answers . (page 7 exercise 4 )
1) What is global warming
Global warming is an average increase in the Earth’s atmosphere.
2) What human activities are causing global warming
Industry, agriculture, transportation, deforestation and the burning of fuels are causing global warming.
3) By how much has the global average temperature increased in the last 100 years
By 1 F (One degree Fahrenheit)
4) Are greenhouse gases necessary for life on Earth
Yes, they are , because they trap heat in the atmosphere of the Earth. Otherwise the Earth would be cold and unsuitable for life.
5) How can individuals help solve the problem of global warming
As individuals we should play our part, we can make small changes like taking public transport, recycling…
Let’s turn to step 4(共8张PPT)
Look at the pictures and what do you know about the topic
The earth is sweating !!!
----Global warming
Acid rain
Greenhouse effect
Discuss : What will happen with global warming
The polar bear
The penguins
Some animals are at risk!
What is global warming
Global warming means an average increase in the Earth’s temperature which leads to climate change.
Work in pairs. Do you Know the reasons for Global Warming
Human being activities
Which countries do you think contribute more to global warming: developed countries like America, or undeveloped countries like many in Africa. Why
developed countries – more industry and technology.
Let’s come to step 3
