Warmingup选修六四单元

1、 We depend on energy to do many things in our daily lives. Make a list of the things that consume energy in your home, school or any other places.Warming-up light things that use energy in your home micro-wave oven cassette player heating television hairdryer video player fridge computer washing mac

2、hine air- conditionerthings that use energy in other placesWhere does the energy come from?Warming-upEnergy sources: renewable and non-renewable Renewable energy sources: energy sources that never run out.Non-renewable energy sources : energy sources that will run out one day.Make a list of energy s

3、ources.coal oil natural gas wind (power)sun (solar energy) water (hydroelectric power) the sea (tidal energy) uranium (nuclear energy) energy sourcesplant waste (biomass energy) non-renewablenon-renewablenon-renewablerenewablerenewablerenewablerenewablenon-renewablerenewablewindmillswind energyrenew

4、ablea coal power Station(燃煤发电站)non-renewablecoalAn oil refinery(精炼厂), non-renewableA nuclear power plant, non-renewableSolar panels(太阳电池板), renewableA hydro-electric dam, renewableGreenhousePre-readingWhat is a greenhouse made of? How does it work?It is made of _and plants can grow in it when its co

5、ld outside, because the glass_ the heat_ the sun and keeps it from _.This makes the greenhouse _ _and so the plants can grow throughout the cold period.glass trapsfromescapingheat upWhat are the “greenhouse gases”? In the atmosphere surrounding the earth there are gases, which are called “greenhouse

6、 gases”, including carbon dioxide, methane (甲烷, 沼气) and water vapor and so on.Methane4Ozone51Carbon dioxide2Water vapor 11Nitrous oxide3 What do greenhouse gases do? Greenhouse gases perform the same function as the glass of a glasshouse. They trap heat from the sun and keep the air surrounding the

7、earth warm, which is called the greenhouse effect. 温室效应Do we need those gases?Without the “greenhouse effect”, what would happen?The earth would be about 33 cooler than it is.We need greenhouse gases like carbon dioxide, methane and water vapour, but if we add huge quantities of extra carbon dioxide

8、 to the atmosphere by burning fossil fuels, it will cause the global temperature to go up which is global warming.global warmingGreenhouse Global warmingAre they all beneficial?？What does it want to tell us?global warmingDesertification沙漠化DroughtWhat disasters will be caused by global warming?meltin

9、g glaciersfloodfamine diseasescoral reefs珊瑚礁golden monkeyfishginkgo银杏disappearance of speciesglaciers melt 冰川融化 species extinction 物种灭绝sea level rises 海平面上升The earth is becoming warmer - ReadingPage 26Read the text carefully and sum up the main idea of each part.Answer the questions. Who wrote the m

10、agazine article? What is the name of the magazine? Sophie Armstrong wrote the magazine article. The name of the magazine is Earth Care.2. How has global warming come about?It is human activity that has caused the global warming (rather than a random but natural phenomenon). The problem begins when h

11、uge quantities of extra carbon dioxide are added to the atmosphere.is due to the burning of fossil fuels3. What do Dr. Janice Foster and the scientist George Hambley think about the results of global warming? Do they agree with one another?Dr. Janice Foster thinks the effects of global warming could

12、 be very _ .George Hambley thinks global warming will be mild with few bad environmental _. They dont agree with each other. seriousconsequencesThe different ideas between Dr. Janice Foster & George Hambley Dr. Janice FosterGeorge HambleyCarbon dioxide has caused the global temperature to _. An incr

13、ease of five degrees would be a _ and could be _. More carbon dioxide is a _ thing,which will make plants grow _, crops _ and will encourage _.go upcatastrophe very seriouspositiveproduce morea greater range of animalsquicker4. What are the two graphs about? Graph I shows the temperature increase of

14、 one degree Fahrenheit between 1860 and 2000. Graph 2 is about the carbon dioxide content in the atmosphere, 19571997 .5. Who found out the amount of carbon dioxide in the atmosphere from 1957 to 1977?A. Dr. Janice Foster. B. Charles Keeling.C. George Hambley. D. Sophie Armstrong.Part one:( para1 )I

15、ntroduce the issue of global warming .Part two: ( para2-5 )Explain how global warming comes about. Part three:(para 6 )List two different attitudes among scientists towards global warming. Part four:( para7 )Its up to readers to think and decide whether people should do something about global warming or not.What skills are used in the four parts?Part 1Part 2Part 3Part 4using a question, leaving readers to think over the issue giving examples ,making contrast (comparison) giving examples ,using graphs, explanation raising a question What should we