unitGlobalwarming张晔-公开课件.ppt

Unit 4 Global Warming The earth is becoming warmer, but does it matter?  3.What do they think about global warming? Do they agree with one another? 1. The temperature of the last century didn’t 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. 4.The rise in carbon dioxide is causing 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. Discussion Suggestions Never give up LOGO What is happening in China in 2010 ? Hainan Province Gansu Province Yunnan Province … Lead-in Rainstorm in Hainan Province Mudslide in Zhouqu Houses were swallowed in Zhouqu Severe drought in Yunnan Province NSEFC Student’s Book 6 Intensive reading Melted ice and snow in Xinjiang What is to blame for these frequent disasters in 2010 ? Let’s find out the main cause NSEFC Student’s Book 6 Intensive reading Fast-reading Who wrote the article? What is the name of the magazine? What is the main topic? Fast-reading Sophie Armstrong Earth Care Global Warming Greenhouse Effect Fast-reading What is the writing style? Narrative (记叙 文） B. Expository (说明文） C. Argumentative（议论文） The purpose of an expository essay is to present, completely and fairly, other peoples views or to report about an event or a situation. The function of an argumentative essay is to show that your assertion (opinion, theory, hypothesis) about some phenomenon or phenomena is correct or more truthful than others. ? ? Fast-reading What is the writing style? Narrative (记叙 文） B. Expository (说明文） C. Argumentative（议论文） ? Careful-reading The main text: Para. 1 Para. 2-5 I II Para. 6 III Para.7 IV Construction Main idea of each part Part1 (1) Introducing the topic of global warming. Part2 (2-5) . Part3 (6