选修6 unit 4 Global Warming warming up and reading课件(共39张)

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名称 选修6 unit 4 Global Warming warming up and reading课件(共39张)
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更新时间 2017-10-01 20:42:30

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课件39张PPT。 Unit 4
Global WarmingHow did come about?the snow catastrophe Some scientists believed that global warming was one of the major reasons why such extreme climate like severe storms and heavy snow frequently came about.Think about :What causes global warming? Human activity or a random but natural phenomenon?When we talk about this problem, we naturally link it to the use of energy and the environmental pollution.But firstly and importantly, energy makes a great difference to our lives. What things do we use energy for?We ____________energy to do many things in our lives. For axample, energy ______our cities and ______our buildings. What other things do we use energy for?depend onlightsheatswww.themegallery.comThings that use energy around us or at any other places:In a houseWhere does all this energy come from?www.themegallery.comPlace and the related energyWind power windPlace and the related energya coal power station coalPlace and the related energyoil refinery
(提炼厂)oilPlace and the related energynuclear power stationUranium
铀Place and the related energysolar panels
(镶板) solar powerPlace and the related energya hydro-electric power(与水有关的)waterEnergy at home,school …sources of energythings using energy Lights
Heating
Television
Cassette player
Video recorder
Computer
Fridge
Stove
Washing machine
Hairdryer Coal
Oil
Natural gas
Wind (wind power)
Sun (solar energy)
Uranium (nuclear energy)
Water (hydro-electric power)Energy at home, school …sources of energyrenewable or non-renewableCoal
Oil
Natural gas
Wind (wind power)
Sun (solar energy)
Uranium (nuclear energy)
Water (hydro-electric power)
Non-renewable
Non-renewable
Non-renewable
Renewable
Renewable
Non-renewable
Renewable
Let’s try to save energy! To save energy is to save our earth!!Slogan['sl?ug?n] ----n. 标语,口号As we know, coal, oil and natural gas are called __________________ , which is a kind of energy. It can make a great __________to our lives. But do you know what by________ is produced when we burn fossil fuel? Is it good for our planet? What ph__________ is caused by it?differenceenomenonproductfossil fuelFossil FuelFossil Fuelcoaloil natural gas● ● ● ● ● ●Why?Picture readingA greenhousegreenhousePicture readingA greenhouse
is made of _______ and is used for growing ________, especially during _____ weather.What is a greenhouse made of and used for?glassplantscoldThe air inside is warm because the glass ______ the heat from the sun and keeps it from _________. This makes the greenhouse __________ and so the plants can grow _______________.trapsescapingheat upthroughout the cold periodHow does a greenhouse work?Now can you connect global warming with greenhouse and think of the relationship between them? Maybe you can understand why we call global warming “greenhouse effect”, right?What’s greenhouse effect?greenhouse effectSurely we need greenhouse gases. Without greenhouse effect, the earth would be___________.In the atmosphere surroudning the earth there are gases called “greenhouse gases”. What do you think greenhouse gases do?It is a pity that human activity gives off extra ______________into the atmosphere therefore it causes______________.too coldcarbon dioxideglobal warmingReadingTask 1 SkimmingSkim the title:
THE EARTH IS BECOMING WARMER – BUT DOES IT MATTER?What is the main topic?
A. The earth. B. Global warming.
C. Becoming warmer doesn’t matter.
?Sophie ArmstrongEarth CareDr Janice Foster, Charles Keeling,
George Hambley P 27 Ex.1 Listen to the magazine article and answer the following questions. Comprehending OneSkimmingThe organization of an expositive: IntroductionA titleBodyConclusionSkimmingSkim the main text: Para. 1Para. 2-3IIIPara. 4-8IIIPara. 9IVIntroduction Body ConclusionSkimmingMatch the parts with the main ideas: Explain how global warming comes about. List two different attitudes among scientists towards global warming. Introduce a debate over global warming. It’s up to readers to think and decide whether people should do something about global warming or not.ScanningMatch the parts with the writing skills: Using a question, leaving readers to think over the issue Raising a question Giving examples, making contrast (comparison) Giving examples, using graphs, explanationI
(1)II (2-3)III (4-8)IV (9)Page 27 Ex.2 T or F1.The temperature in the last century didn’t seem to increase 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 temperatrue
4. The rise in carbon dioxide is causing a steady in crease in global warming.
5. George Hambley believes scientists are just guessing about the effects of global warming.
6. It is clear what the effects of global warming will be.
1.The temperature in the last century didn’t seem to increase 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 temperatrue T TFLine 2: … it is a rapid increase compared to most natural changes… Line 5 : There is doubt that… 4. The rise in carbon dioxide is causing a steady in crease in global warming.
5. George Hambley believes scientists are just guessing about the effects of global warming. T T6. It is clear what the effects of global warming will be. FLine 45: No one knows… Idea-sharingWe should do nothing about global warming.DebateThank You !