2019年选修六Unit4Globalwarming课件PPT精品教育.ppt

Words study,Unit4 Global warming Reading,授课人 刘胜丽,What causes the global warming? Human activity or a random but natural phenomenon?,Think about:,coal,oil,natural gas, ,Why?,Fossil Fuel,Look at the following pictures. What do the pictures show?,Human activity- burning of fossil fuels.,Greenhouse effect- greenhouse gases- we need those gases.,We add huge quantities of extra carbon dioxide to the atmosphere by burning Fossil fuels.,学科网,学科网,学科网,Greenhouse effect,What are the effects and disasters of global warming?,Whats worse ,the glaciers(冰川） of the South Pole are beginning to crack（破裂）,The glaciers of the Poles are starting to melt due to the increasing temperatures caused by global warming.,tsunami,The sea level to rise.,tornados,Severe storms,droughts,famines,the spread of diseases,destruction of species,The Earth Is Becoming Warmer But Does It Matter?,Reading,Fast-Reading,Whats the main topic of the article?,Its about global warmingthe warming of the earth.,skimming,2. Who wrote the magazine article? What is name of the magazine?,They are Dr.Janice Foster,Charles Keeling and George Hambley.,Reading Comprehension I,skimming,3. What has caused global warming?,Human activity.,4. What do scientists think makes the earths temperature go up?,The burning of fossil fuels.,skimming,5. How does “greenhouse effect” come about?,It comes about when small amounts of gases in the atmosphere trap heat from the sun and therefore warm the earth.,True or false?( P27),scanning,Reading Comprehension II,2,The temperature in the last century didnt seem to increase much. 2. Everyone believes that global warming is caused by the activities of humans. 3. Janice Foster believes 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.,1.The purpose of the first paragraph is to _. introduce the writer B. explain a change C. introduce the topic D. raise a question 2. The graphs are used to _. illustrate points by providing evidence tell the change of temperature tell the content of carbon dioxide in the air interest the readers,skimming,Reading Comprehension III,3. Greenhouse gases refer to_. carbon dioxide B. the burning of fossil fuels C. byproducts of the burning of fossil fuels D. coal, natural gas and oil 4. Greenhouse effect _. A. is a natural phenomenon B. happens when theres too much carbon dioxide C. does great harm to human beings D. makes life for human beings better,scanning,5. _ found out the amount of carbon dioxide in the atmosphere from 1957 to1997. A. Dr. Janice Foster B. Charles Keeling C. George Hambley D. Sophie Armstrong 6. Which of the following statements is True? Burning fossil fuels causes the global warming. B. We will have more food with global warming. C. Global warming means disasters to humans. D. More greenhouse gases will gather in the atmosphere.,Careful reading to get detail information,The different ideas between Dr. Janice Foster & George Hambley(Group work),go up,catastrophe,very serious,positive,produce more,a greater range of animals,Sumary,(1)Get the students master the method of fast-reading and careful-reading. (2)Get the students discribe the main idea of the passage using their own words. (3) Get the students learn to live a low-carbon life.,Homework,1. Prepare a debate in groups. 2. Surf the Internet for more information about global warming.,