高二英语选修6第四单元reading1

1、Unit 4 Global Warming,Warming Up and Reading,1. Have you ever seen a greenhouse?,2. How does the greenhouse work?,The air inside was warm because the glass traps(挡住, 吸收) the heat from the sun and keeps it from escaping(逃跑). This makes the greenhouse heat up(热量 上升) and so the plants can grow througho

2、ut(在期间) the cold period.,4. Greenhouse Effect,Global warming,Greenhouse gases trapped the heat from the sun, which causes the temperature of earth goes up.,Methanemi:ein,What are Greenhouse gases?,There are gases called “greenhouse gases”, including,Carbon dioxide,Water vapor,Fossil Fuel(矿物燃料),coal,

3、oil,gas, ,produce,二氧化碳,4. What are the two graphs about?,The first graph shows the temperature increase of one degree Fahrenheit between 1860 to 2000. The second graph shows the carbon dioxide content in the atmosphere from 1957 to 1997.,THE EARTH IS BECOMING WARMER BUT DOES IT MATTER?,Reading,New W

4、ords and expressions,temperature 温度 one degree Fahrenheit 华氏一度 explore 探索 human activities 人类活动 phenomenon 现象 subscribe to 同意，赞成 fossil fuels 矿物燃料 byproduct 副产品 “greenhouse” gases 温室气体 atmosphere 大气 methane 甲烷， 沼气,degree Celsius 摄氏度 quantities of 大量的 accurate measurements 精确的测量 data 资料，数据 catastroph

5、e 大灾难 be opposed to 反对 environmental consequences 环境影响 a great range of 大量的 even if 即使 keep on 继续,1) How many paragraphs does the reading 2) Make a division of the text.,Read the passage quickly (3),text consist of? Please number them.,Fast-Reading,Paragraph 1,Paragraphs 2&5,Paragraph 6,Main idea of

6、 the text,Paragraph 7,How global warming comes about? (全球变暖是怎样产生的),Two different opinions about global warming.,The earth is becoming warmer.,Should we do anything?,Skimming,What is the main topic? The earth. B. Global warming. C. Becoming warmer doesnt matter.,Skimming,Where does this article most

7、probably come from?,Newspaper B. Novel C. Magazine,Skimming,Who wrote the article?,What is the name of the magazine?,Skim the first paragraph:,Sophie Armstrong,Earth Care,Skimming,What are the names of the three scientists mentioned in the article?,Dr Janice Foster, Charles Keeling, George Hambley,3

8、. What do the three scientists think about global warming?,believes it is the burning of more and more fossil fuels that is resulting in a big increase in carbon dioxide.,Dr. Janice Foster George Hambley Charles Keeling,thinks the effects of global warming could be very serious (严重的).,thinks global

9、warming will be mild with few bad environmental consequences.,cause the sea level to rise severe storms floods droughts famines the spread of diseases disappearance of species,Positive effects,Negative effects,make plants grow quicker crops will produce more a greater range of animals make life bett

10、er,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. 3. Janice Foster believes that she can measure the future global rise in temperature.,T,T,F,4. The rise in carbon dioxide is causing

11、 a steady increase in global warming. 5. George Hambley believes that global warming will do good rather than harm to the earth. 6. It is clear what the effects of global warming will be.,T,T,F,Severe storms,droughts,famines,the spread of diseases,disappearance of species,A : We shall do something about global warming.,B: We shall do nothing about global warming.,Debate,What we should do to protect our earth?,Discussion:,1. Reduce the burning of