仁爱版九年级上Unit2Topic3SectionC课件

Unit2Topic3

Whatkindsofthingscanwedotoprotecttheenvironment?SectionC---ByDavid2021/5/911._____it’sraininghard,hekeepsonworking outside.2.Kangkangcanplaythevoilin,______Ican’t.3.Mr.Linisverykind_____heisvery humorous,too.4.Thesuitfitsmewell_____Ican’taffordit.Though

while

and

butFillintheblanksusingbut,and,though

and

while.Revision:2021/5/92Whatnewwayshavebeeninventedtoproducepower?Askandanswer:electricvehiclebiogastechnology2021/5/93Whatnewwayshavebeeninventedtoproducepower?Askandanswer:maglevtrainwaterbattery2021/5/94Lookupthesewordsinadictionary.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2021/5/95Windisusedforproducingelectricity

inmanyplaces.Lookatthefollowingpicturesandguessthemeaningoftheunderlinedword.Guessinggame2021/5/96Moreandmorepeopleareinterestedinelectriccars.Guessinggame2021/5/97ThemaglevtraininShanghaiusesmagnets.Themagnetspushthetrainforward.Guessinggame2021/5/98…peopleproducepowerfromcoal,butitisverydirtyandcausesacidrain.Guessinggame2021/5/99Nuclearpoweriscleanbutitisverydangerous.Guessinggame2021/5/910Readandunderstand1aChoosetherightpictureforeachparagraph.2021/5/911Inmanycountries,peopleproducepowerfromcoal,butitisverydirtyandcausesacidrain.Somecountriesusenuclearenergytoproducepower.However,nuclearpowercanbeverydangerous.Tosolvetheenergyproblem,peopleallovertheworldarelookingallthetimefornewwaystoproducepower.abc2021/5/912c______Chinaisoneofthefirstcountriesintheworldtousebiogastechnology.Farmersrecyclestraw,grassandanimalwastetomakebiogas.Thisrenewableenergyisusedinpeople’severydaylife.abcChoosetherightpictureforeachparagraph.2021/5/913______Electricvehiclesweredevelopedinthe1990s.Nowthereareelectricvehiclesinmanycountries.Theyareveryefficientandcostverylittletorun.Althoughelectricvehiclesproducenopollution,therewillbeanincreaseinelectricityneedsiftheyarewidelyused.aabc2021/5/914______InChina,thebest-knownmaglevtrainistheGerman-builtoneinShanghai.Ittakespeople30kmtotheairportinjust7minutesandreachesatopspeedof431kmperhour.Itisquietandquick.Thereisnowheelnoise,becausetherearenowheels.Maglevtrainsareveryenergyefficientanddonotpollutetheair.However,maglevguidepathsaremuchmoreexpensivethantraditionalstreetrailways.babc2021/5/9151.Whyisn’tcoalagoodmaterial?2.Whatisthedisadvantageofusingnuclearpower?3.Whatdoyouthinkofelectriccars?4.Whatdoyouthinkofthemaglevtrain?Becauseitisverydirtyandcausesacidrain.Becauseitcanbeverydangerous.

Itisquietandquick.Theyareveryefficientandcostverylittletorun.Askandanswer:Answerthefollowingquestionsaccordingto1a.2021/5/916Read1aagainandfilloutthefollowingtable.WaytoproducepowerAdvantageDisadvantagebiogaselectricvehiclemaglevtrainrenewable

efficient,cheap,nopollution

quiet,quick,energyefficient,nopollution

Itwillcauseanincreaseinelectricityneeds.muchmoreexpensivethantraditionaltrains.Workalone:1b2021/5/917powerstations2021/5/918themovementofwater2021/5/919thewindpower2021/5/920solarenergy2021/5/921a.Therearemorethan3000powerstationsintheworldthatproduceelectricitybyburninggarbagetoheatwater.b.Peopleusethemovementofwatertoproduceelectricity.c.Windisusedforproducingelectricityinmanyplaces.d.Peopleproduceelectricityfromthesun.(b)(c)(d)Workalone(a)2a2021/5/922Whathabitsaregoodfortheenvironment?Listasmanyasyoucan.Themoreyoulist,thegreeneryouare.GoodHabits1.Turnoffthelightswhenyouleavearoom.2.Walkorrideabikeinsteadoftakingabusorataxi.

3.Takeaclo