人教版选修6Unit4Globalwarmingwarmingup课件

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,Unit4 Module6,Global Warming,Unit4 Module6Global Warming,1,Revision,What are the Energy resources and are they renewable or non-renewable?,Windmills,renewable.,RevisionWhat are the Energy re,2,A coal power station,non-renewable.,A coal power station,non-ren,3,An oil refinery(精炼厂),non-renewable.,An oil refinery(精炼厂),non-rene,4,A nuclear power plant,non-renewable.,A nuclear power plant,non-ren,5,Solar panels,renewable.,Solar panels,renewable.,6,A hydro-electric dam,renewable.,A hydro-electric dam,renewabl,7,Non-renewable Renewable,Coal,Oil,Natural gas,Uranium,Wind(wind power),Sun(solar energy),Water(hydro-electric power),Plant waste(biomass energy),Hot springs or geysers(geothermal energy),The sea(tidal energy),Fossil fuels,Non-renewable RenewableCoalW,8,What are fossil fuels?,Ancient animal and plant material below the surface of the earth with a high carbon content,such as coal,oil and natural gas,which can be burnt to produce energy.Also known as non-renewable energy because once they are used they have gone forever;they cannot be renewed.,What are fossil fuels?Ancient,9,What is the greenhouse made and used for?,What is the greenhouse made,10,人教版选修6Unit4Globalwarmingwarmingup课件,11,How does it work?,The air inside is warm because the glass traps the heat from the sun and keeps it from escaping.This makes the greenhouse heat up and so the plants can,grow throughout,the cold period.,How does it work?,12,What are the“greenhouse gases”?,In the atmosphere surrounding the earth there are gases,which are called“greenhouse gases”,including carbon dioxide,methane(甲烷,沼气)and water vapor.,What are the“greenhouse gases,13,What do you think greenhouse,gases do?,They trap heat from the sun and therefore warm the earth.,What do you think greenhouse,14,