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北师大2003课标版《Lesson 1 Global Warming》PPT课件优质课下载
Acid rain
Greenhouse effect
Based on the title “Can we take the heat”and the following pictures.
Predict :
What is the text about?
Traffic Jam
Factory
The text may be about:
1.Vehicles and factories pump varieties of gases in huge quantities, especially carbon dioxide, into the atmosphere, which causes the greenhouse effect and will cause some other disasters.
2. How do we take action to deal with this problem and stop the disasters from happening?
Read 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.Effects of global warming.
5. What cause global warming
Para 1.
Para 2.
Para 3.
Para 4.
Para 5.
1) The main purpose of the first paragraph is __________.
A. to introduce the topic of global warming to the readers
B. to remind the readers of human activities in the past