仁爱版九年级上Unit2Topic3SectionC课件.ppt

Unit2Topic3Whatkindsofthingscanwedotoprotecttheenvironment SectionC ByDavid 1 it sraininghard hekeepsonworkingoutside 2 Kangkangcanplaythevoilin Ican t 3 Mr Linisverykind heisveryhumorous too 4 Thesuitfitsmewell Ican taffordit Though while and but Fillintheblanksusingbut and thoughandwhile Revision Whatnewwayshavebeeninventedtoproducepower Askandanswer electricvehicle biogastechnology Whatnewwayshavebeeninventedtoproducepower Askandanswer maglevtrain waterbattery Lookupthesewordsinadictionary power acidrain nuclear renewable electric efficient 电力 动力 力 酸雨 原子核的 原子能的 核动力的 可更新的 电动的 用电的 效率高的 有能力的 Windisusedforproducingelectricityinmanyplaces Lookatthefollowingpicturesandguessthemeaningoftheunderlinedword Guessinggame Moreandmorepeopleareinterestedinelectriccars Guessinggame ThemaglevtraininShanghaiusesmagnets Themagnetspushthetrainforward Guessinggame peopleproducepowerfromcoal butitisverydirtyandcausesacidrain Guessinggame Nuclearpoweriscleanbutitisverydangerous Guessinggame Readandunderstand 1a Choosetherightpictureforeachparagraph Inmanycountries peopleproducepowerfromcoal butitisverydirtyandcausesacidrain Somecountriesusenuclearenergytoproducepower However nuclearpowercanbeverydangerous Tosolvetheenergyproblem peopleallovertheworldarelookingallthetimefornewwaystoproducepower c Chinaisoneofthefirstcountriesintheworldtousebiogastechnology Farmersrecyclestraw grassandanimalwastetomakebiogas Thisrenewableenergyisusedinpeople severydaylife Choosetherightpictureforeachparagraph Electricvehiclesweredevelopedinthe1990s Nowthereareelectricvehiclesinmanycountries Theyareveryefficientandcostverylittletorun Althoughelectricvehiclesproducenopollution therewillbeanincreaseinelectricityneedsiftheyarewidelyused a InChina thebest knownmaglevtrainistheGerman builtoneinShanghai Ittakespeople30kmtotheairportinjust7minutesandreachesatopspeedof431kmperhour Itisquietandquick Thereisnowheelnoise becausetherearenowheels Maglevtrainsareveryenergyefficientanddonotpollutetheair However maglevguidepathsaremuchmoreexpensivethantraditionalstreetrailways b 1 Whyisn tcoalagoodmaterial 2 Whatisthedisadvantageofusingnuclearpower 3 Whatdoyouthinkofelectriccars 4 Whatdoyouthinkofthemaglevtrain Becauseitisverydirtyandcausesacidrain Becauseitcanbeverydangerous Itisquietandquick Theyareveryefficientandcostverylittletorun Askandanswer Answerthefollowingquestionsaccordingto1a Read1aagainandfilloutthefollowingtable renewable efficient cheap nopollution quiet quick energyefficient nopollution Itwillcauseanincreaseinelectricityneeds muchmoreexpensivethantraditionaltrains Workalone 1b powerstations themovementofwater thewindpower solarenergy a Therearemorethan3000powerstationsintheworldthatproduceelectricitybyburninggarbagetoheatwater b Peopleusethemovementofwatertoproduceelectricity c Windisusedforproducingelectricityinmanyplaces d Peopleproduceelectricityfromthesun b c d Workalone a 2a Whathabitsaregoodfortheenvironment Listasmanyasyoucan Themoreyoulist thegreeneryouare GoodHabits 1 Turnoffthelightswhenyouleavearoom 2 Walkorrideabikeinsteadoftakingabusorataxi 3 Takeaclothbagwhenyougoshopping 4 Don tuseplasticbags 3 Writt