选修unit公开课PPT学习教案

1、会计学1Unit 4 Global WarmingUnit 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？Reading第1页/共20页New 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 “greenhous

2、e” 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 继续第2页/共20页Skim the title: THE EARTH IS BECOMING WARMER BUT DOES IT MATTER?A. The earth

3、. B. Global warming. C. Becoming warmer doesnt matter. 第3页/共20页The structure of the article: IntroductionA titleBodyConclusion第4页/共20页Skim : Para. 1Para. 2-3Para. 4-6Para. 7第5页/共20页Match the main idea of each part: 第6页/共20页Who wrote the article?What is the name of the magazine?Careful reading :the f

4、irst paragraph: 第7页/共20页FTF第8页/共20页1. Greenhouse effect is a natural p_. _ amounts of Greenhouse 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

5、in the blanks about the causes of Greenhouse effect.henomenon uantities rapped go upSmall第9页/共20页Para 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 ca

6、rbon dioxide in the atmosphere went up from around 315 parts to around 370 parts per million.第10页/共20页The amount of warming could be as low as 1 to 1.5 degrees Celsius, but it could be as high as 5 degrees.第11页/共20页Para 6Dr. Janice Foster thinks it is serious.George Hambley thinks global warming wil

7、l be mild with few bad environmental consequences. 第12页/共20页Positive effects Negative effects 第13页/共20页1. cause the sea level to rise2. severe storms3. floods4. droughts5. famines6. the spread of diseases7. disappearance of speciesPositive effects Negative effects 第14页/共20页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 better第15页/共20页第16页/共20页