辽宁省北票市高级中学高中英语选修六 UNIT 4 GLOBAL WARMING WARMING UP AND READING 课件 .ppt

1、Unit 4-warming up and readingGlobal warmingIs the whole world becoming warmer and warmer?Why?energy sourcesWe depend on energy to do many things in our daily lives.For example,energy lights our cities and heats our buildings.Make a list of things that use energy in your home,in your school,or any ot

2、her places you can think of.stove light things that use energy in your home micro-wave oven cassette player heating television hairdryer video player fridge computer washing machine stoveWind energy is used as power to produce electricity.Windmillswhere electricity is produced by burning coals.The c

3、oal power stationsin which oil is refined and made pure.The Oil Refineriesa facility designed to convert nuclear energy into electricity.A nuclear power plant on the roof of a house on a bright sunny day are used to collect solar energy,making your house warm or heating your water.Solar panelsare us

4、ed to keep back water and raise its level for irrigation or for producing electricity,etc.The Hydro-electric damsWhat source of energy?Geysers(间歇泉)Geothermal(地热的)Energy PlantAn energy source is“renewable”when supplies of it never run out and“non-renewable”when one day they will run out.Which energy

5、sources on your list are renewable and which are non-renewable?DiscussThings that use energy in your homeSources of energyRenewable/non-renewablelightheatingtelevisioncassette playervideo playercomputerfridgestovewashing machinehairdryercoaloilnatural gaswind(wind power)sun(solar energy)uranium(nucl

6、ear energy)water(hydro-electric power)plant waste(biomass energy)hot spring or geysers(geothermal energy)the sea(tidal energy)non-renewablenon-renewablenon-renewablerenewablerenewablenon-renewablerenewablerenewablerenewablerenewableDiscussion:What should we do to save energy in daily life?In our dai

7、ly life,we can do these things like that:1.Turn off the tap when you are cleaning your teeth2.Recycle paper and glass10.Use products that save energy 3.Walk or cycle everywhere4.Turn off the lights when your are not in the room5.Get something repaired rather than buy a new one6.Use both sides of a s

8、heet of paper7.Try not to use one-time-use box/cup/chopsticks8.Take a bag with you when you go shopping9.Use rechargeable(可充电的）batteries11.Let the air-condition remain 26 What are these buildings made of and what is their purpose?They are made of glass and plants can grow in it when it is cold outsi

9、de.How does it work?The glass traps the heat from the sun,making the air warm so that plants can grow better.Greenhouse gases!Whats greenhouse gases effect?Greenhouse gases perform the same function as the glass in a greenhouse -They trap the heat of the sun and keep the air surrounding the earth wa

10、rm.It is called the greenhouse effect.The Earth Is Becoming Warmer But Does It Matter?Fast ReadingGlance at the article and answer the question.It has a title,a first paragraph that runs across the page and is in bold,the main text in two columns,graphs/diagrams,two quotes.What is the structure of a

11、 magazine like this and how is the text organized?Reading comprehensionRead the article again and finish comprehending on page 27Sophie Armstrong wrote the magazine article.The name of the magazine is“Earth care”.2.What are the names of the three scientists mentioned in the article?They are Dr.Janic

12、e Foster,Charles Keeling and George Hambley.1.Who wrote the magazine article?What is the name of the magazine?3.What do they think about global warming?Do they agree with one another?There are some very different attitudes among scientists towards this issue.Some think the effects will be terrible,w

13、hile some others believe that we should not worry about it.4.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 2:5.What is the main topic of the

14、 article?Global warming/The warming of the earth.1.The temperature last century didnt increase much.2.Everyone believes that global warming is caused by the activities of humans.3.Janice Foster believes that global warming is caused by burning fossil fuels.4.Natural gas is a greenhouse gas.5.Carbon

15、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.TTFTTFDetailed-Reading Read the article in details and finish the following task.listening1.Who found out the amount of carbon diox

16、ide in the atmosphere from 1957 to 1977?A.Dr.Janice Foster.B.Charles Keeling.C.George Hambley.D.Sophie Armstrong.Listen to the reading passage and do some choices.2.But there are some very different attitudes among scientists towards this issue.”“issue here means the same as the one in_.A.I bought t

17、he new stamp the day of its issue.B.They are talking about one of the key issues in the election campaign.C.The government is expected to issue a statement about the election.D.The magazine has 12 issues each year.3.The author probably agrees that _A.actually global warming is good for man.B.we shou

18、ld do nothing about the global warming.C.catastrophes will happen if the globe keeps on warming.D.a lot remains to be found out about the effects of global warming.Questionnaires-I1.Does Sophie Armstrong support a clear opinion?2.Does George Hambley believe that we should worry much about the global

19、 warming?No.he doesnt state it clearly.No,he doesnt.3.How has the global warming come about?Human activity-burning of fossil fuels.Greenhouse effect-greenhouse gases-we need those gases.Huge quantities of extra carbon dioxide-from 1957 to 1997-from around 315 parts per million to around 370 parts pe

20、r million.4.What are the effects of global warming?Encourage a greater range of animals.The sea level to rise.Severe storms,droughts,famines,the spread of diseases,and destruction of species.Make plants grow faster.Crops will produce more.main ideaPart1(para1)Introduce a debate over the issue of glo

21、bal warmingPart 2(para2)Part 3(para3-8)Part 4(para9)Illustrate how global warming comes aboutList two different attitudes among scientists towards global warmingIts up to readers to think and decide whether people should do sth about global warming or not 4 parts1.What is the purpose of the paragrap

22、h that is in bold?To introduce the topic.To illustrate(阐述)points by providing evidence.2.What are the diagrams for?Questionnaires-II3.Why are there two quotes?Because they are important or interesting points.Their aim is to attract your attention and to make you read them,and therefore to make you i

23、nterested enough to read the whole 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.4.What is the purpose of the last paragraph of the article?The different ideas between Dr.Janice Foster&George Hambley

24、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 _ and will encourage _.go upcatastrophe very seriouspositiveproducea greater range of animalsHomework Prepare the language points of this passage and underline the important ones.Review the reading passage.Finish useful words and expressions.