2019年选修六Unit4Globalwarming课件PPT精品教育.ppt
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1、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 effe
2、ct- 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 glac
3、iers 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 mai
4、n 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. Wha
5、t 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 Comprehe
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