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1、Unit 4 Global WarmingThe Earth is Becoming Warmer-But Does It Matter?地球在变暖地球在变暖要不要紧？要不要紧？ReadingNew Words and expressionstemperature 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
2、 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catastrophe 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SkimmingSkim the title: THE EARTH IS BECOMING WARMER BUT DOES IT MATTER?What is the main topic?A.The earth. B. Global
3、 warming. C. Becoming warmer doesnt matter. The structure of the article: IntroductionA titleBodyConclusionSkim the body part(7 paras): Para. 1Para. 2-3I III IIPara. 4-6IIIIIIPara. 7IVIVIntroduction Body ConclusionMatch the main idea of each part: Explain how global warming comes about. Two differen
4、t attitudes among scientists towards the consequences of global warming. Introduce the problem of global warming. Give a warning and raise a question for the readers to think over.I (1)II (2-3)III (4-6)IV (7)Who wrote the article?What is the name of the magazine?Careful reading :the first paragraph:
5、 Sophie ArmstrongEarth CarePart II(Para2-3)1.Everyone believes that global warming is caused by the activities of humans.2.Janice Foster believes that she can measure the future global rise in temperature.3.Greenhouse Gases are totally bad.FTF1. Greenhouse effect is a natural p_. _ amounts of Greenh
6、ouse gases in the atmosphere. But the problem begins when we add huge q of extra carbon dioxide to the atmosphere. Therefore, more heat energy is t in the atmosphere causing the global temperature to _. Fill in the blanks about the causes of Greenhouse effect.henomenon uantities rapped go upSmallPar
7、a 4. the levels of carbon dioxide have increased greatly over the last 100 to 150 years1.Who made accurate measurements of the amount of carbon dioxide?2. How much has increased?Charles KeelingThe carbon dioxide in the atmosphere went up from around 315 parts to around 370 parts per million.Para 5.
8、How high will the temperature go?The amount of warming could be as low as 1 to 1.5 degrees Celsius, but it could be as high as 5 degrees.What do Dr. Janice Foster and the scientist George Hambley think about the consequences of global warming? Do they agree with one another?Para 6 They dont agree wi
9、th each other. Dr. Janice Foster thinks it is serious.George Hambley thinks global warming will be mild with few bad environmental consequences. Does global warming matter?Positive effects Negative effects 1.cause the sea level to rise2.severe storms3.floods4.droughts5.famines6.the spread of disease
10、s7.disappearance of speciesPositive effects Negative effects 1.cause the sea level to rise2.severe storms3.floods4.droughts5.famines6.the spread of diseases7.disappearance of speciesPositive effects Negative effects 1.make plants grow quicker2.crops will produce more3.a greater range of animals4.make life betterDisscussion:How to reduce greenhouse gases?Have a disscussion with your classmates .The earth is becoming warmer, does it matter?Homework1.Read the text again, and try to retell it.2.Find out the difficult sentences in the passage .
