高二英语选修6学案习题点拨 Unit4Globalwarming 含.docx
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高二英语选修6学案习题点拨 Unit4Globalwarming 含.docx
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高二英语选修6学案习题点拨Unit4Globalwarming含
教材习题点拨
COMPREHENDING
AnswerstoExercise1:
1.SophieArmstrong.EarthCare.
2.DrJaniceFoster,CharlesKeeling,GeorgeHambley.
3.Therearesomeverydifferentattitudesamongscientiststowardsthisissue.Somethinktheeffectswillbeterrible,whilesomeothersbelievethatweshouldnotworryaboutit.
4.ThefirstgraphshowsthetemperatureincreaseofonedegreeFahrenheitfrom1860to2000.Thesecondgraphshowsthecarbondioxidecontentintheatmospherefrom1957to1997.
5.Globalwarming./Thewarmingoftheearth.
LEARNINGABOUTLANGUAGE
Discoveringusefulwordsandexpressions
AnswerstoExercise1:
Possiblemeanings
Word
Whichused
1.n.ageneraltendencyinthewayasituationischanging
2.v.tostartdoingsomethingthateveryonecopies
trend
1
1.v.tomakesomething(especiallysomethingbad)increase
2.n.asubstancethatcanbeburnedtomakeheatorenergy
fuel
2
1.n.thephysicalormentalconditionofsomeone
2.v.toformallysayorwritesomeinformationoranopinion
state
2
1.v.tousetime,energy,goods,etc.
2.v.(formal)toeatordrinksomething
consume
1
1.v.tolookquicklyatsomeoneorsomething
2.v.toreadsomethingveryquickly
glance
2
AnswerstoExercise2:
1.data,kepton
2.quantities,runout
3.buildup,catastrophe
4.comeabout
5.consequence
6.phenomenon
7.graph
8.per
9.evenif
10.resultedin
Discoveringusefulstructures
AnswerstoExercise1
Apartfromashiftinemphasis,themeaningisthesameinthetwosentences.Thewriterhasgivenextraemphasistotheopinionthathumanactivityhascausedthisglobalwarming.Thesecondsentencehasbeenwrittenintheform“Itis...that...”.“It”hasbeenusedinthesecondsentencetogiveextraimportanceto“humanactivity”.
1.ItwasascientistcalledCharlesKeeling,whomadeaccuratemeasurementsoftheamountofcarbondioxideintheatmospherefrom1957to1997.
2....itistheburningofmoreandmorefossilfuelsthathasresultedinthisincreaseincarbondioxide.
AnswerstoExercise2:
1.Itwasscientistswhowarnedthatgreenhousegaseswouldwarmtheearthbytrappingheatenergyintheatmosphere.
2.Itwasthegreenhouseeffectthatgivestheearth'ssurfacetheaveragetemperatureof15℃.
3.Itisfossilfuelsthatmuchoftheenergyusedtolightandheatourhomescomesfrom.
4.Itisthedevelopedcountriesthatconsumethemostenergyintheworld.
5.Itisforcenturiesthatcarbondioxidehasthetendencytostayintheatmospherewhileothergreenhousegasesstayintheatmosphereonlyforadayorless.
6.Itistheirveryexistencethatlowlyingcountriesfeelisindangerfromrisingsealevels.
7.Itisenvironmentalistswhohavetriedtostoptheearth'stemperaturerising.
8.Itisfutureclimatechangesandtheireffectsonourenvironmentthatscientistswanttofindoutabout.
9.Itisbyseveralmetresthattheleveloftheseacouldriseintheyearsaheadbecauseofglobalwarming.
10.Itisouterspacethatmightprovideuswithnewenergysourcesinthefuture.
AnswerkeyforExercise1:
EarthCare'ssuggestions:
·Turnelectricalappliancesoffwhennotusingthem.
·Don'tturnuptheheat,putonmoreclothes.
·Walkorrideabike,don'tdrive.
·Recyclecans,bottles,plasticbagsandnewspapers.
·Buythingsmadefromrecycledmaterials.
·Buyproductsthatuselessenergy.
·Getyourparentstobuyproductsthatuselessenergy.
·Planttrees.
·Talkwithfamilyandfriendsaboutglobalwarming.
Canyoucarryitout?
Students'answersmayvary.
Reasons:
Students'answersmayvary.
Listeningandspeaking
Listening
LISTENINGTEXT
FOSSILFUELSANDOTHERFORMSOFENERGY
(L=LiBin K=Keeling)
LiBin,auniversitystudent,isinterviewingProfessorKeelingonthelocalstudentradiostationabouttheuseoffossilfuelsandothersourcesofenergy.
Part1
L:
ProfessorKeeling,I'vereadthatwemuststopusingfossilfuelsifwewanttoreducetheamountofcarbondioxideintheair.
K:
Yes,that'sright,LiBin.Howeverit'sdifficult.Ourmodernindustrialsocietiesdependontheenergywegetfromfossilfuels.It'saverycheapandconcentratedformofenergy.
L:
Isittruethat90%oftheworld'senergycomesfromfossilfuels?
K:
Yes,that'scorrect.Andthere'senoughtolastforcenturies.
L:
Couldwereplacefossilfuelswithcleanersourcesofenergylikesunorwindpower?
K:
I'mafraidnot.Wejustcan'tproduceenough.Youneedhugeareasoflandtoproduceenoughwindenergy.Thetechnologywehaveatpresentcannotprovideenoughsunenergy.
L:
Sowhataboutnuclearpower?
Thatdoesn'tproducecarbondioxide.
K:
True,butit'sverydangerous.RemembertheaccidentatChernobyl.Peoplearestilldyingoftheradiationthatwasproducedbythatdisaster!
Part2
L:
Sowhatcanwedo?
K:
Well,therearethreethings.Firstwemustfindwaysofusingfossilfuelsthatwon'tputcarbondioxideintotheair.Second,wemustproduceproductsthatareeconomicalwithenergy.Third,wemustaskpeopletocutdownontheenergytheyuse.
L:
Butthat'sonapersonallevel.Whataboutfactories?
Theydon'tcutdowntheiruseofenergy.
K:
No,theydon't.However,thatisaproblemwemustworkonasaglobalcommunity.Thatmeansdevelopedanddevelopingcountrieswillhavetoworktogether.
L:
Butit'snotthedevelopingcountriesthatputmostofthecarbondioxideintotheair.Thedevelopedcountriesarereallytheonestoblame.
K:
That'strue.Sowemustworktogetherbecauseglobalwarmingwillaffecteveryone.Ifwewantthefuturegenerationstohaveagoodlife,wemustalllookaftertheplanet.
AnswerstoExercise1:
1.Agree 2Agree 3Disagree 4Disagree
SuggestedanswerstoExercise2:
Sourcesofenergy
Notes
Fossilfuels
●producecarbondioxide
●cheapandconcentratedformofenergy
Windpower
●clean
●notpractical:
needhugeareasoflandtoproduceenoughenergy
Energyfromthesun
●clean
●notverypracticalwithpresenttechnology
Nuclearpower
●doesnotproducecarbondioxide
●dangerous
SuggestedanswerstoExercise3:
Firstwemusttrytofindwaystousefossilfuelsthatwon'tputcarbondioxideintotheair.
Secondwemustproduceproductsthatareeconomicalwithenergy.
Thirdwemustaskpeopletocutdownontheenergytheyuse.
AnswerkeyforExercise4:
factories,energy;problem,global;developed,workbookdeveloping;developing,dioxide,blame
Workbook
LISTENING
LISTENINGTEXT
MILLENNIUMKIDS
(T=teacher J=Julie S=Student)
Julie,ateenagerwhobelongstoanorganizationinAustraliacalledMillenniumKidsisvisitingaclass.Theteacherandstudentsareaskingherquestionsabouttheorganization.
Part1
T:
HelloJulie.It'ssonicetoseeyouhere.CanyoutellusaboutMillenniumKids?
J:
Sure.It'sanorganizationrunbykidsforkids.It'sconcernedwiththeenvironment.
S1:
Julie,mayIaskhowitstarted?
J:
ItwasstartedbyfourWesternAustraliankidswhoorganizedachildren'sconferenceontheenvironmentin1996.Nowweholdaconferenceeveryyear.KidscometoitfromalloverAustralia—andfromothercountriestoo.It'sgreatfun.Wediscusswhatwe'vedoneanddecidewhatprojectswe'lldointhefollowingyear.
S2:
Thatsoundssointeresting!
Whatsortsofprojectsdoyoudo?
J:
Well,allsorts.Lastyearwehadaschoolprojecttohelpkidsunderstandaboutglobalwarming.Actuallyweperformedaplaycalled“TheHorsethatSavedtheWorld”.Ittaughtkidsnottotraveltoschoolsooftenbycar.Itexplainedwhyit'ssomuchbetterfortheenvironmentifwewalk,rideabikeorgobybus.
(murmursofagreement)
Part2
S2:
Hey,Iridetoschoolalready!
IsthereanythingelseIcando?
J:
Oh,lotsofthings.Youcanencourageyourparentstobuyelectricalgoodsthatcansaveenergy;youcanwearawarmsweaterinsteadofturningontheheatingincoldweather;andyoucanturnoffelectricalapplianceswhenyouarenotusingthem.
S1:
Thanksforthat.Whatotherprojectshaveyoudone?
J:
We'veplantedtreesanddevelopedactivitiesthatreduce,reuseandrecyclewaste.Thisyearwe'reaskingkidstothinkofwaystoreduce,reuseandrecycleplasticbags—theyaresuchaproblem.
S3:
Thatsoundsveryinteresting.
T:
Well,thankyou,Julie.MillenniumKidscertainlysoundslikeagoodorganization.
J:
Yes,it'sfunbeingaMillenniumKid.It'salsoimportant.Ifwedon'tcarefortheenvironment,wemaynothaveafuture.That'saprettygoodreasontodosomething,don'tyouthink?
Exercise1:
Students'answersmayvary.
AnswerstoExercise2:
QuestionstoJulie
Heranswers
WhatisMillenniumKids?
anorganizationrunbykidsforkids;concernedwiththeenvironment
Whostartedit?
When?
fourwesternAustraliankids;in1996
Whywasitorganized?
todrawattentiontotheenvironment
Whatplaydidtheyperformlastyear?
TheHorsethatSavedtheWorld
Whatwasthepurposeofperformingtheplay?
toexplainwhyit'sbetterfortheenvironmentifwewalk,ridebikesorgobybustoschool
AnswerstoExercise3:
Methodsofsavingenergy:
√buyenergysavinggoods
√turnoffapplianceswhennotusingthem
ProjectsthatMillenniumKidshavedone:
1.plantedtrees
2.developedactivitiesthatreduce,reuseandrecyclewaste
3.plannedwaystoreduce,reuse,recycle,plasticbags
TALKING
USINGWORDSANDEXPRESSIONS
SuggestedanswerstoExercise1:
1.Ithinkourconferencewasverysuccessfulonthewhole.ProfessorBrown'spresentationwaswarmlyreceived.
2.Thereisawiderangeofenergysources:
coal,oil,naturalgas,waterpower,nuclearpowerandsoon.
3.Sinceyourbicycleisbroken,youcanusemine,solongasyoutakegoodcareofit.
4.Sueoftenbuysfoodatthenearbystoreandheatsitinthemicrowaveforlunch.Thenshedrinksacanofcoketorefreshherselfandgoesbacktotheoffice.
5.IwouldliketothankMrSmithonbehalfoftheschoolforhisworkasascholar,aneng
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