Learning about Language第二课时教学设计

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While reading Skimming: 1. Look at the title & the structure of the article and try to guess where this article most probably comes from.A. a newspaper

B. a novel

C. a magazine

2. Answer the following questions. (课本P27第一题)

Scanning: 1. Choose the best answer. (1) Greenhouse gases refer to _______. A.

carbon dioxide

B. the burning of fossil fuels C. byproducts of the burning of fossil fuels D. coal, natural gas and oil (2) Greenhouse effect _____. A. is a natural phenomenon

B. happens when there’s too much carbon dioxide

C. does great harm to human beings D. makes life for human beings worse (3)_____ found out the amount of carbon dioxide in the atmosphere from 1957 to1977. A. Dr. Janice Foster

B. Charles Keeling C. George Hambley

D. Sophie Armstrong

2. true or false (课本P27第2题)

3. Read the passage and answer the following questions.

1) What has caused global warming?

2) What can we learn from graph 1? 3) Can you explain the meaning of these two words: greenhouse gases & greenhouse effect? 4) What can we learn from graph 2? 5) Does every scientist accept this data? 6) How high will the temperature increase go?

4. Point of view: What do Dr. Janice Foster and George Hambley think about the consequences of global warming? Do they agree with one another?

5. Complete the table.

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The cause of During the burning of fossil fuels, some __________ like carbon dioxide and methane are produced, which can global ________ from the sun and warm the earth. warming Scientists’

__________ towards the increase in carbon dioxide Some think it could be very serious. They think it may cause a rise of several metres in the _________ and cause catastrophes such as _________, floods, droughts and so on. Some believe that it is a ________ thing. They think it can make plants grow quicker and crops will ________. Besides, it will encourage a greater range of animals. All of these things will make life for human beings ________. The climate is going to keep on ________ for decades or centuries. No one knows the _________ of global warming. Some facts

Post reading 1. Discussion:

1) Is greenhouse effect good or bad? 2) What should we do with global warming? No one knows the effects of global warming, does that mean we should do nothing?

2.Fill in the blanks to finish the Summary of the text and then try to retell it. It is believed that the earth is __________ ________and that it is human activity ____ has caused this global warming ___________ a random _____ natural phenomenon. But the attitudes of scientists ________ this warming are completely different. Dr. Janice Foster thinks the effects of global warming could be very _______. _______ George Hambley thinks global warming will ____________ few bad environmental ____________. Anyway, the climate is going to _________ warming for decades or centuries, _______ we start reducing the amount of greenhouse gases.

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