山东省沂水一中高二英语 Unit 4 the first period课件(25) 新人教版 课件.ppt

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,*,*,*,Unit 4 Global warming,Unit 4,The first,period,Teaching methods,situational teaching method;,cooperative learning method;,programmed teaching method;,task-based and assessment,teaching methods.,Teaching aims and demands,一、,topic:Global warming;pollution;the importance of protecting the earth,二、,vocabulary,三、,functions:Agreement and disagreement,Blame and complaint,四、,grammar:The use of it,Arrangement of teaching,the first period:warming up,the second period:language points of reading,the third period:reading,the fourth period:learning about language and language points of using language,the fifth period:using language,the sixth period:grammar,the seventh period:exercises,1.Check,up Daily Exercises,energy sources,We 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 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,stove,Wind energy is used as power to,produce,electricity.,Windmills,where electricity is produced by burning coals.,The coal power stations,in which oil is refined and made pure.,The Oil Refineries,a 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 panels,are used to keep back water and raise its level for irrigation or for producing electricity,etc.,The Hydro-electric dams,Guess it!,Uranium Ore(,铀矿石,),The element uranium does not occur in pure form in nature but is found in minerals such as,carnotite,（,钒钾铀矿,）,pictured here.,What source of energy?,Geysers,(,间歇泉,),Geothermal(,地热的,)Energy Plant,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 your list are renewable and which are non-renewable?,Discuss,Things that use energy in your home,Sources of energy,Renewable/non-renewable,light,heating,television,cassette player,video player,computer,fridge,stove,washing machine,hairdryer,coal,oil,natural gas,wind(wind power),sun(solar energy),uranium(nuclear energy),water(hydro-electric power),plant waste(biomass energy),hot spring or geysers(geothermal energy),the sea(tidal energy),non,-,renewable,non,-,renewable,non,-,renewable,renewable,renewable,non-,renewable,renewable,renewable,renewable,renewable,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 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 in a greenhouse -They trap the heat of the sun and keep the air surrounding the earth warm.,It is called the greenhouse effect.,Homework,Prepare for the language,points,