仁愛版九年級上Unit2Topic3SectionC課件

Whatnewwayshavebeeninventedtoproducepower?Askandanswer:electricvehiclebiogastechnology第二頁第二頁，共24頁。Whatnewwayshavebeeninventedtoproducepower?Askandanswer:maglevtrainwaterbattery第三頁第三頁，共24頁。Lookupthesewordsinadictionary.power

acidrain

nuclear

renewable

electric

efficient電力；動力；力酸雨原子核的，原子能的；核動力的可更新的電動的，用電的效率高的；有能力的第四頁第四頁，共24頁。Windisusedforproducingelectricity

inmanyplaces.Lookatthefollowingpicturesandguessthemeaningoftheunderlinedword.Guessinggame第五頁第五頁，共24頁。Moreandmorepeopleareinterestedinelectriccars.Guessinggame第六頁第六頁，共24頁。ThemaglevtraininShanghaiusesmagnets.Themagnetspushthetrainforward.Guessinggame第七頁第七頁，共24頁?！璸eopleproducepowerfromcoal,butitisverydirtyandcausesacidrain.Guessinggame第八頁第八頁，共24頁。Nuclearpoweriscleanbutitisverydangerous.Guessinggame第九頁第九頁，共24頁。Readandunderstand1aChoosetherightpictureforeachparagraph.第十頁第十頁，共24頁。Inmanycountries,peopleproducepowerfromcoal,butitisverydirtyandcausesacidrain.Somecountriesusenuclearenergytoproducepower.However,nuclearpowercanbeverydangerous.Tosolvetheenergyproblem,peopleallovertheworldarelookingallthetimefornewwaystoproducepower.abc第十一頁第十一頁，共24頁。c______Chinaisoneofthefirstcountriesintheworldtousebiogastechnology.Farmersrecyclestraw,grassandanimalwastetomakebiogas.Thisrenewableenergyisusedinpeople’severydaylife.abcChoosetherightpictureforeachparagraph.第十二頁第十二頁，共24頁。______Electricvehiclesweredevelopedinthe1990s.Nowthereareelectricvehiclesinmanycountries.Theyareveryefficientandcostverylittletorun.Althoughelectricvehiclesproducenopollution,therewillbeanincreaseinelectricityneedsiftheyarewidelyused.aabc第十三頁第十三頁，共24頁。______InChina,thebest-knownmaglevtrainistheGerman-builtoneinShanghai.Ittakespeople30kmtotheairportinjust7minutesandreachesatopspeedof431kmperhour.Itisquietandquick.Thereisnowheelnoise,becausetherearenowheels.Maglevtrainsareveryenergyefficientanddonotpollutetheair.However,maglevguidepathsaremuchmoreexpensivethantraditionalstreetrailways.babc第十四頁第十四頁，共24頁。1.Whyisn’tcoalagoodmaterial?2.Whatisthedisadvantageofusingnuclearpower?3.Whatdoyouthinkofelectriccars?4.Whatdoyouthinkofthemaglevtrain?Becauseitisverydirtyandcausesacidrain.Becauseitcanbeverydangerous.

Itisquietandquick.Theyareveryefficientandcostverylittletorun.Askandanswer:Answerthefollowingquestionsaccordingto1a.第十五頁第十五頁，共24頁。Read1aagainandfilloutthefollowingtable.WaytoproducepowerAdvantageDisadvantagebiogaselectricvehiclemaglevtrainrenewable

efficient,cheap,nopollution

quiet,quick,energyefficient,nopollution

Itwillcauseanincreaseinelectricityneeds.muchmoreexpensivethantraditionaltrains.Workalone:1b第十六頁第十六頁，共24頁。powerstations第十七頁第十七頁，共24頁。themovementofwater第十八頁第十八頁，共24頁。thewindpower第十九頁第十九頁，共24頁。solarenergy第二十頁第二十頁，共24頁。a.Therearemorethan3000powerstationsintheworldthatproduceelectricitybyburninggarbagetoheatwater.b.Peopleusethemovementofwatertoproduceelectricity.c.Windisusedforproducingelectricityinmanyplaces.d.Peopleproduceelectricityfromthesun.(b)(c)(d)Workalone(a)2a第二十一頁第二十一頁，共24頁。Whathabitsaregoodfortheenvironment?Listasmanyasyoucan.Themoreyoulist,thegreeneryouare.GoodHabits1.Turnoffthelightswhenyouleavearoom.2.Walkorrideabikeinsteadoftakingabusorataxi.

3.Takeaclothbagwhenyougoshopping.4.Don'tuseplasticbags.3Writtenwor