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Unit 4 Global warming 第一学时 Reading and Comprehension,Task 1,快速阅读课文“The Earth is Becoming Warmer But does it Matter？”用大约30词写出课文的概要。 温馨提示：本文属于说明文，以说明为主要表达方式来解说事物，阐明事理，启迪思维。写概要时要紧扣说明的对象，并根据文章的总分结构，围绕不同的观点来阐述地球变暖的原因以及预测利弊的要点。 _,答案： In the passage，Sophie Armstrong explores the questions on how human activity creates “greenhouse gases”which directly leads to the global warming，and shows us the different attitudes among scientists towards global warming.,Task 2,仔细阅读“The Earth is Becoming Warmer But does it Matter？”选择正确答案。 1From the passage we can infer that the author probably agrees that_. Aglobal warming is good for humans indeed Bpeople should do nothing about the global warming,D,Ccatastrophes will happen if the globe keeps on warming Da lot remains to be found out about the effects of global warming 2All the followings are true EXCEPT_ . Aeveryone believes that global warming is caused by human activities Bcarbon dioxide is a byproduct of burning fossil fuels,A,Cpeople accept Charles Keelings data because he took accurate measurements Dnot all the scientists agree with each other on the effect of the global warming 3The main difference between Dr.Janice Fosters theory and George Hambleys lies in_. Ahow to prevent global warming Bwhat causes global warming,D,Cwhether global warming would cause serious problems or not Dwhether the levels of carbon dioxide have increase or not over the years 4“But there are some very different attitudes among scientists towards this issue.” “issue” here means the same as the one in “_” AI bought the new stamp the day of its issue,B,BThis is a big issue；we need more time to think about it CShe is always on a dietshe has issues about food DThe magazine has 12 issues each year 5What may happen if we do nothing about global warming? AThere may be a rise of the sea level.,A,BThe temperature will surely be lower. CThe “greenhouse effect” will disappear. DIt has nothing to do with us.,Task 3,再次阅读“The Earth is Becoming WarmerBut does it Matter？”然后完成下面的表格。,fossil fuels,produce energy,carbon dioxide,add,up,sea level,floods,droughts,quicker,more,Task 4,根据课文“The Earth is Becoming WarmerBut does it Matter？”完成下列短文。 There is no doubt 1._ the earth is becoming warmer but there is a fierce debate over whether it is human activity that has caused this global warming or whether it is just a natural phenomenon. Many scientists like Dr.Janice Foster believe that people have caused the increase in the earths temperature,that,2._ the burning of fossil fuels like coal，natural gas and oil to produce energy 3._ byproducts are called “greenhouse” gases，the most important one 4._ carbon dioxide.These gases trap heat from the sun and therefore warm the earth，without which the earth 5._ (be) about thirtythree degrees Celsius cooler than it is.But increased amount of carbon dioxide means that 6._ heat energy is trapped in the atmosphere 7._ (cause) the global temperature to go 8._.,through,whose,being,would be,more,causing,up,On 9._ other hand，scientists like George Hambley believe that any warming will be mild with 10._ bad environmental consequences and more carbon dioxide is actually a positive thing.,the,few,
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