人教新课标选修六Unit4-Global-warming-Warming-up-&-Reading[课件]-3.ppt

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1、人教新人教新课标选修六修六Unit4-Global-warming-Warming-up-&-Reading课件件-3Extreme heat 酷暑酷暑 Can you think of some natural disasters(自然灾害自然灾害)because of the extreme heat?drought(旱灾旱灾)firefloodhurricane /typhoonI feel hot!.Low-carbon life（低碳生活）（低碳生活）Is the whole world becoming warmer and warmer?Why?populationair pol

2、lutioncarbon dioxideacid rainspecies extinctionwater pollution 全球气候变暖是一种全球气候变暖是一种“自然现象自然现象”。人们焚烧。人们焚烧化石矿物以生成能量或砍伐森林并将其焚烧时会产化石矿物以生成能量或砍伐森林并将其焚烧时会产生二氧化碳等多种温室气体。这些温室气体对来自生二氧化碳等多种温室气体。这些温室气体对来自太阳辐射的可见光具有高度的透过性，而对地球反太阳辐射的可见光具有高度的透过性，而对地球反射出来的长波辐射具有高度的吸收性，能强烈吸收射出来的长波辐射具有高度的吸收性，能强烈吸收地面辐射中的红外线，导致全球气候变暖，也就是地

3、面辐射中的红外线，导致全球气候变暖，也就是常说的常说的“温室效应温室效应”。全球变暖会使全球降水量重。全球变暖会使全球降水量重新分配、冰川和冻土消融、海平面上升等，既危害新分配、冰川和冻土消融、海平面上升等，既危害自然生态系统的平衡，更威胁人类的食物供应和居自然生态系统的平衡，更威胁人类的食物供应和居住环境。住环境。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 li

4、st of things that use energy in your home,in your school,or any other 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 electri

5、city.Windmillswhere electricity is produced by burning coals.The coal power stationsin which oil is refined and made pure.The Oil Refineries to change 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

6、 warm or heating your water.Solar panelsThe Hydro-electric dams are used to keep back water and raise its level for irrigation or for producing electricity,etc.An energy source is“renewable”when supplies of it never run out and“non-renewable”when one day they will run out.Which energy sources on you

7、r list are renewable and which are non-renewable?Discusscoaloilnatural gaswind(wind power)sun(solar energy)nuclear energywater(hydro-electric power)the sea(tidal energy)non-renewablenon-renewablenon-renewablerenewablerenewablenon-renewablerenewablerenewablePre-readingWhat is the greenhouse made and

8、used for?greenhouseThey are made of glass and plants can grow in it when it is cold outside.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

9、 in a greenhouse -They trap the heat of the sun and keep the air surrounding the earth warm.It is called the greenhouse effect.The Earth Is The Earth Is Becoming Warmer Becoming Warmer But Does It But Does It Matter?Matter?Fast ReadingGlance at the article and Glance at the article and answer these

10、questions.answer these questions.Sophie 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.Janice Foster,Charles Keeling and George Hambley.1.Who wrote the magazine article?What is the name of

11、 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,while some others believe that we should not worry about it.4.What are the two graphs about?Graph

12、 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 article?Global warming/The warming of the earth.1.The temperature in the last century didnt inc

13、rease much.2.Everyone believes that global warming is caused by the activities of humans.3.Janice Foster believes that she can measure the future global rise in temperature.4.The rise in carbon dioxide is causing a steady increase in global warming.5.George Hambley believes that global warming will

14、do good rather than harm to earth.6.It is clear what the effects of global warming will be.Read the article carefully.Tell true or false.TTFTTFDetailed-Reading Read the article in details Read the article in details and finish the following and finish the following task.task.1.Who found out the amou

15、nt of carbon dioxide in the atmosphere from 1957 to 1977?A.Dr.Janice Foster.B.Charles Keeling.C.George Hambley.D.Sophie Armstrong.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 the new stamp on the day of its is

16、sue.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 should do nothing about the global

17、 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.4.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

18、dioxide-from 1957 to 1997-from around 315 parts per million to around 370 parts per million.5.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.Cro

19、ps will produce more.Paragraph 1Paragraphs 2&5Paragraph 6Part1Part2Part4Main idea of the textPart3Paragraph 7How global warming comes about?(全球变暖是怎样产生的全球变暖是怎样产生的)Two different opinions about global warming.The earth is becoming warmer.Should we do anything?The different ideas between Dr.Janice Foster&George Hambleygo upcatastrophe very seriouspositiveproducea greater range of animals谢谢