Global warming课件.ppt

1、,Unit 4 Global warming,The earth is becoming warming but does it matter?,Reading,陵水族民中学 郑丽君 高二(6),Skimming,1. What is mainly discussed in the text? A. Carbon dioxide. B. Water vapour. C. Gases in the atmosphere. D. Temperature increase.,2. How has global warming come about? A. Its a random phenomeno

2、n. It is human activity. The sea level to rise. Severe storm.,3. What is the name of the magazine? A. Greenhouse B. Carbon dioxide C. Earth Care D. Water vapour,4.Who wrote the magazine article? Dr Janice Forster B. George Hambley C. Charles Keeling D. Sophie Armstrong,5.What is the Graph 1 about ?

3、A. It shows the temperature increase of one degree Fahrenheit between 1860 to 2000. B. It shows the temperature increase of two degrees Fahrenheit between 1860 to 2000. C. It shows the temperature increase of three degrees Fahrenheit between 1860 to 2000. D. It shows the temperature increase of four

4、 degrees Fahrenheit between 1860 to 2000.,6. What is the Graph 2 about ? A. It is about the methane content in the atmosphere, 1958 1990. It is about the carbon dioxide content in the atmosphere, 1958 1990. It is about the water vapour content in the atmosphere, 1958 1990. It is about the natural ga

5、s content in the atmosphere, 1958 1990.,1.What are the names of the three scientists mentioned in the article? Dr Janice Forster, Charles Keeling and Sophie Armstrong B. George Hambley, Sophie Armstrong and Charles Keeling C. Dr Janice Forster, Charles Keeling and George Hambley D. Sophie Armstrong

6、, Dr Janice Forster and George Hambley,scanning,2.What do they think about global warming? A. They have the same attitudes. They have different attitudes. They think the effects will be serious. They believe that we should not worry about it.,3.What are the diagrams for ? Because they are important.

7、 Because they are interesting. We should not be too worried about global warming. To illustrate points by providing evidence.,4.What is the purpose of the first paragraph? To introduce the topic. To explain points. To draw a conclusion Tell us what global warming is.,5.What is the purpose of the las

8、t paragraph? A. Global warming is a natural phenomenon. B. Talk about reasons for global warming. C. The effect of global warming. D. To draw a conclusion and predict what might happen in the future.,6. What will happen if we do nothing about global warming? It would cause the sea level to rise, sto

9、rms,droughts,famines and so on. The temperature will be surely lower. C. It doesnt matter. D.It has nothing to do with me.,Listen & Read : True or False,1.The temperature in the last century did not seem to increase much. 2.Everyone believes that global warming is caused by the activities of humans.

10、 3.Janice Foster believes that she can measure the future global rise in temperature.,F,T,F,4.The rise in carbon dioxide is causing a steady increase in global warming. 5.George Hambely believes that global warming will do good rather than harm to the earth. 6.It is clear what the effects of global

11、warming will be.,T,T,F,Discussion: What can we do about global warming?,For example: save energy: save the water/ eletricity /use few plastic bags/ less hot water / use solar-energy / wind power etc. protect the environment: plant more trees /protect the water /protect animals / use less the air-conditioner.etc. we should help more pe