选修六book6unit4reading-the-earth-is-becoming-warmer-but-does-it-matter优秀PPT.ppt

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1、Book 6 Unit 4 Global warmingLook at the picture and what can you know from it？234What people are doing1 light things that use energy in your home micro-wave oven television hairdryer video player fridge computer washing machine stoveDo you know how energy is produced?How many sources of energy can y

2、ou list?Wind energy is used as power to produce electricity.windmillsElectricity is produced by burning coals.coal power stationsOil is refined and made pure.oil refineriesNuclear energy is converted into electricity.nuclear power plantpieces of equipment on a roof that collects energy from sunlight

3、 in order to heat water and produce electricity solar panelsWater are kept back and raised its level for irrigation or for producing electricity.hydro-electric damsgeothermal(地热的地热的)energy plantElectricity is generated from hot dry rocks.Which source is cleaner or healthier?Which source is“renewable

4、”?Thinking:Coal oil wind sun nuclear water underground heatnon-renewablerenewableCarbon Carbon dioxidedioxidecoaloil natural gasglobal warming Why?Fossil Fuels1.Do you know what it is?A greenhouseWhat is it used for?Pre-reading:A greenhouse is made of _ and is used for _,especially during _weather.g

5、rowing plantsglasscold 2.How does the greenhouse work?The air inside was warm because the glass traps(拦住拦住,吸取吸取)the heat from the sun and keeps it from escaping(逃跑逃跑).This makes the greenhouse heat up(热量热量上升上升)and so the plants can grow throughout(在在期间期间)the cold period.3.What are Greenhouse gases?I

6、n the atmosphere surrounding the earth there are gases,which are called“greenhouse gases”,mainly including _,and water vapor(水蒸气水蒸气).carbon dioxide4.Greenhouse Effect Global warmingGreenhouse gases trapped the heat from the sun,which causes the temperature of earth goes up.The Earth is Becoming Warm

7、er -But Does It Matter?ReadingSkimming（略读）（略读）Skim the title:THE EARTH IS BECOMING WARMER BUT DOES IT MATTER?1.What is the main topic?A.The earth.B.Global warming.C.Becoming warmer doesnt matter.Skimming2.This article is from _.A.An environmental magazine.B.A diaryC.A novel D.A story3.Who wrote the

8、article?Sophie Armstrong 4.What is the name of the magazine?Earth Care Part1Part2Part3C.Introduction of global warming(1)(2-5)(6)A.How global warming comes aboutB.List two different attitudes towards global warmingPart4(7)D.Whether people should do something about global warming Who writes this arti

9、cle?Sophie Armstrong of Earth CareWhat happened during 20th century?The temperature of the earth rose about one degreeCareful readingPart1Part1(1)(1)Introduction of global warming.2._1._Part2Part2(2-5)How global warming comes about?the burning of fossil fuels human activityCarbon dioxideMethaneWhat

10、are the greenhouse gases?1.2.3.Water vapor 3.What are the two graphs about?Graph 1 shows the temperature increase of one degree Fahrenheit between 1860 to 2000.Graph 2 shows the carbon dioxide content in the atmosphere from 1957 to 1997.Graph 1:Graph 2:What are the different attitudes towards global

11、 warming?Part3Part36Part3(6-7)Dr.Janice FosterGeorge HambleypessimisticoptimisticPart3(6-7)a rise in the see levelsevere stormsdroughtsFloods DroughtsFaminesSpread of diseasesDisappearance of species optimisticIt is a _ thing,which makes plants grow _;crops will produce _;it will encourage a greater

12、 range of _ all of which will make life _.positivequickermoreanimalsbetterDr.Janice FosterGeorge HambleyPart3(6-7)Do they draw a conclusion at last?NoStep 4 DiscussionNo one knows the effects of global warming.Does that mean we should do nothing?Now lets listen to a song and then give your opinions.

13、在你心中有个地方，我知道那里充溢了爱。这个地方会比明天更绚丽。假如你真的努力过，你会发觉不必哭泣。在这个地方，你感觉不到伤痛或烦忧。到那个地方的方法很多，假如你真心关怀生者，营造一些空间。创建一个更奇妙的地方.挽救这世界，让它变得更好，为你、为我，为了全人类。Discussion（探讨）ABA:We shall do something about global warming.B:We shall do nothing about global warming.Lets live a low-carbon life！To reduce carbon dioxide and save ener

14、gyTurn electrical appliances off when not using them.Put on more clothes,dont turn up the heat.Walk or ride a bike,dont drive.Recycle cans,bottles,plastic bags and newspapers.Buy things made from recycled materials.Buy products that use less energy.Plant trees.Talk with family and friends about global warming.Homework1.Read the passage again and recite the new words and expressions.2.Preview the language points.