1、Unit 4 Global warmingUnit 4The 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、fun
2、ctions:Agreement and disagreementBlame and complaint四、grammar:The use of itArrangement of teachingthe first period:warming upthe second period:language points of readingthe third period:readingthe fourth period:learning about language and language points of using languagethe fifth period:using langu
3、agethe sixth period:grammarthe seventh period:exercises 1.Check up Daily Exercisesenergy 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 other places
4、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 coal power s
5、tationsin 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 used to keep
6、back water and raise its level for irrigation or for producing electricity,etc.The Hydro-electric damsGuess 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)Ene
7、rgy PlantAn 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?DiscussThings that use energy in your homeSources of energyRenewable/non-renewablelightheatingtelevisi
8、oncassette playervideo playercomputerfridgestovewashing machinehairdryercoaloilnatural gaswind(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-renewablenon-renewablenon-renewable
9、renewablerenewablenon-renewablerenewablerenewablerenewablerenewableWhat 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.HomeworkPrepare for the language points
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