选修uni公开课课件

1、选修uni公开课1选修uni公开课2unit 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选修uni公开课3new 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

2、 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 继续选修uni公开课4skim the title: the earth is becoming warmer but does it mat

3、ter? the earth. b. global warming. c. becoming warmer doesnt matter. 选修uni公开课5the structure of the article: introductiona titlebodyconclusion选修uni公开课6skim : para. 1para. 2-3para. 4-6para. 7选修uni公开课7match the main idea of each part: 选修uni公开课8who wrote the article?what is the name of the magazine?care

4、ful reading :the first paragraph: 选修uni公开课9everyone believes that global warming is caused by the everyone believes that global warming is caused by the activities of humans.activities of humans.janice foster believes that she can measure the future janice foster believes that she can measure the fu

5、ture global rise in temperature.global rise in temperature.greenhouse gases are totally bad.greenhouse gases are totally bad.ftf选修uni公开课101. 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 at

6、mosphere. 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 upsmall选修uni公开课11para 4. the levels of carbon dioxide have increased greatly over the last 100 to 150 years who mad

7、e 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.选修uni公开课12para 5.para 5. how high will the how high will the temperature go?temperature go?the amount of

8、 warming could be as low as 1 to 1.5 degrees celsius, but it could be as high as 5 degrees.选修uni公开课13what do dr. janice foster and the scientist george hambley think about the consequences of global warming? do they agree with one another?para 6dr. janice foster thinks it is serious.george hambley t

9、hinks global warming will be mild with few bad environmental consequences. 选修uni公开课14does global warming matter?positive effects negative effects 选修uni公开课15 cause the sea level to rise severe storms floods droughts famines the spread of diseases disappearance of speciespositive effects negative effe

10、cts 选修uni公开课16 cause the sea level to rise severe storms floods droughts famines the spread of diseases disappearance of speciespositive effects negative effects make plants grow quicker crops will produce more a greater range of animals make life better选修uni公开课17disscussion:disscussion:how to reduce greenhouse how to reduce greenhouse gases?gases?have a disscussion with your classmates .选修uni公开课18the earth is becoming warmer, does the earth is becoming warmer, does it matter?it matter?