1、Unit 4 Global warmingWarming Up&Reading()1.Learn something about the global warming.2.Save energy and tell the importance of protecting the earth.3.Master the reading skills.An energy source is“renewable”when supplies of it never run outand“non-renewable”when one day they will run out.Which energy s
2、ources on your list are renewable and which are non-renewable?Renewable or non-renewable?Renewable or non-renewable?What is a greenhouse used for?How does it work?In the atmosphere surrounding the earth there are gases,which are called“greenhouse gases”.methanewater vaporcarbon dioxideGreenhouse Gas
3、esWhich are greenhouse gases?carbon dioxideFossil Fuel(矿物燃料)coaloilgasglobal warming produce_ the heat from the sunkeeps it from _ the air upHow does a greenhouse work?trapsescapingheatsDoes it matter if the earth becomes warmer?TThe earth is becoming warmer but does it matter?Part.Part Part The int
4、roductionThe bodyThe conclusionPara 1Paras(26)Para 7Who is to blame for the earthsbecoming warmer?raise a questionThe main idea of each part：ReadingFast Reading Skimming1.Who wrote the magazine article?What is the name of the magazine?2.What are the names of the three scientists mentioned in the art
5、icle?SSophie Armstrong.ophie Armstrong.Earth Care.Dr Janice Foster,Charles Keeling,George Hambley.Reading tips:In English,some nouns begin with a capital letter(大写字母),such as names of people and places,titles(标题)of magazines,newspapers,stories and books,peoples titles(头衔),etc.3.What is mainly discus
6、sed in the passage?A.What has caused the global warming and whether it matters.B.What effects of the global warming will be.C.How serious the global warming could be.D.What the global warming is.SkimmingReading tips skim the title and Para 1:Title:THE EARTH IS BECOMING WARMER BUT DOES IT MATTER?Para
7、 1:how has this come about and does it matter?Para 31.How do humans affect the earth warming up?Humans burn fossil fuels like coal,natural gas and oil to produce energy.2.What are greenhouse gases?The byproducts of the process of producingenergy,the most important one is carbon dioxide.careful readi
8、ngPara 4.Who made accurate measurements of the amount of carbon dioxide?Charles KeelingPara 5How high will the temperature increase go?It could be as high as 5 degrees.Para 6What do Dr.Janice Foster and the scientist George Hambley think about the results of global warming?Do they agree with each ot
9、her?Dr Janice FosterGeorge HambleyCarbon dioxide has caused the global temperature to _.An increase of five degrees would be a _ and could be_.More carbon dioxide is a _ thing,which makes crops _ more and will encourage _.go upcatastrophevery seriouspositiveproducea greater range of animals1.They do
10、nt agree with each other.2.What is the purpose of the last paragraph of the article?It functions as a conclusion by asking the reader to reflect on the major theme of the text and to predict what might happen in the future.Does global warming matter?Positive effectsNegative effects1.cause the sea le
11、vel to rise;2.severe storms;3.droughts;4.famines;5.destruction of species 6.flood1.make plants grow faster;2.crops will produce more;3.make life better 1.The temperature last century didnt increase much.2.Everyone believes that global warming is caused by the activities of humans.3.Janice Foster bel
12、ieves that global warming is caused by burning fossil fuels.4.Natural gas is a greenhouse gas.5.Carbon dioxide is a byproduct of burning fossil fuels.6.People accept Charles Keelings data because he took accurate measurements.Read the article carefully.Tell true or false.TTFTTFDiscussion:The earth i
13、s becoming warmer,but does it matter?If it does,as a student,what should you do about it?DebateABA:We shall do something about global warming.B:We shall do nothing about global warming.What should we do?Love our planet!Love life!Homework 1.Review the text carefully.2.Remember all the words by your heart.Where there is a will，there is a way.有志者事竟成
