九年級英語9單元單詞表重點

九年級英語9單元單詞表重點

1.Ecosystem:Abiologicalcommunityofinteractingorganismsandtheirphysicalenvironment.

2.Biodiversity:Thevarietyoflifeintheworldorinaparticularhabitatorecosystem.

3.Habitat:Thenaturalhomeorenvironmentofananimal,plant,orotherorganism.

4.Endangered:Aspeciesofanimalorplantthatisseriouslyatriskofextinction.

5.Extinction:Thestateorprocessofaspecies,family,orlargergroupbeingorbecomingextinct.

6.Pollution:Thepresenceorintroductionintotheenvironmentofasubstanceorthingthathasharmfulorpoisonouseffects.

7.Globalwarming:Thelong-termincreaseinEarth'saveragesurfacetemperatureduetohumanactivities,suchastheburningoffossilfuels.

8.Deforestation:Theremovaloftreesfromaforestedareawithoutadequatereplanting.

9.Renewableenergy:Energygeneratedfromnaturalresources,suchassunlight,wind,andwater,whichareconstantlyreplenished.

10.Sustainable:Capableofbeingmaintainedatasteadylevelwithoutexhaustingnaturalresourcesorcausingsevereecologicaldamage.

11.Conservation:Theactofprotectingandpreservingnaturalresourcesandtheenvironment.

12.Ozonelayer:AlayerintheEarth'sstratospherethatcontainsahighconcentrationofozone,whichabsorbsmostofthesun'sultravioletradiation.

13.Fossilfuel:Anaturalfuel,suchascoal,oil,ornaturalgas,formedfromtheremainsoflivingorganismsovermillionsofyears.

14.Carbonfootprint:Thetotalamountofgreenhousegasesproduced,eitherdirectlyorindirectly,byanindividual,organization,orproduct.

15.Recycle:Convertwasteintoreusablematerial.

16.Compost:Decayedorganicmaterialusedasafertilizerforplants.

17.Pollutant:Asubstancethatpollutes,especiallyacontaminantreleasedintotheenvironmentasaresultofhumanactivity.

18.Conservationist:Apersonwhoadvocatesorsupportstheprotectionandpreservationoftheenvironmentandwildlife.

19.Organic:Relatingtoorderivedfromlivingmatter.

20.Sustain:Maintainorsupport,especiallyintermsofenvironmentalpractices.

21.Replenish:Restoreorrefillaresourceorsupply.

22.Wildlife:Wildanimalscollectively;thenativefaunaofaregion.

23.Renewableresources:Resourcesthatcanbereplenishedorreplacednaturallyovertime,suchassunlightandwind.

24.Non-renewableresources:Resourcesthatarefiniteandcannotbereplenishedoncetheyaredepleted,suchasfossilfuels.

25.Emission:Thereleaseordischargeofsubstancesintotheatmosphere,especiallypollutantsfromvehicles,factories,orpowerplants.

26.Greenhouseeffect:TheprocessbywhichheatistrappedintheEarth'satmospherebygasessuchascarbondioxide,causingtheplanettobecomewarmer.

27.Carbondioxide:Acolorless,odorlessgasproducedbyburningcarbonandorganiccompounds,aswellasbyrespirationandfermentation.

28.Acidrain:Rainfallthathasbecomeacidicduetotheemissionofsulfurdioxideandnitrogenoxideintotheatmosphere,causingenvironmentaldamage.

29.Environmentalist:Apersonwhoisconcernedaboutandadvocatesfortheprotectionoftheenvironment.

30.Renewableenergysources:Energysourcesthatarenotdepletedwhenused,suchassolar,wind,andhydroelectricpower.

31.Ecologicalbalance:Theequilibriumstateofanaturalcommunityoforganismsinwhicheachspecieshasaroletoplay,andpopulationsremainrelativelystableovertime.32.Foodchain:Alinearnetworkoflinksinafoodwebstartingfromproducerorganismsandendingatapexpredators,depictingthefeedingrelationshipswithinanecosystem.33.Keystonespecies:Aspeciesthathasadisproportionatelylargeeffectonitsenvironmentrelativetoitsabundance,oftenplayingacriticalroleinmaintainingthestructureofanecosystem.34.Invasivespecies:Anon-nativespeciesthatdisruptsthebalanceofanecosystembyoutcompetingnativespeciesforresources,oftenleadingtonegativeimpactsonbiodiversity.35.Habitatdestruction:Theprocessofalteringordestroyinganaturalhabitatinsuchawaythatitnolongersupportsthespeciesthatdependonit,oftenduetohumanactivitiessuchasurbanizationanddeforestation.36.Overfishing:Theactofcatchingtoomanyfishinawaterbody,depletingthepopulationtothepointwhereitcannotrecovertoitsformerlevel,leadingtonegativeeffectsonmarineecosystems.37.Waterpollution:Contaminationofwaterbodies(e.g.,lakes,rivers,oceans,aquifers)byhumanactivities,leadingtonegativeimpactsonaquaticlifeandhumanhealth.38.Airpollution:Thepresenceofsubstancesintheatmospherethatcanbeharmfultohumanhealth,ecosystems,orboth,oftenresultingfromtheburningoffossilfuelsandindustrialprocesses.39.Climatechange:Long-termshiftsinweatherpatternsandassociatedimpactsonecosystems,societies,andeconomies,primarilycausedbyhumanactivitiesthatincreasegreenhousegasconcentrationsintheatmosphere.40.Carbonsequestration:Theprocessofcapturingandstoringcarbondioxidefromtheatmosphere,oftenthroughnaturalprocesseslikephotosynthesisorartificialmethodslikecarboncaptureandstoragetechnology.41.Sustainableagriculture:Farmingpracticesthatmaintainsoilfertility,minimizepollution,andconservenaturalresources,ensuringthelong-termviabilityofagriculturalsystems.42.Circulareconomy:Aneconomicsystemaimedateliminatingwasteandthecontinualuseofresources,involvingrecycling,reusing,andrepurposingmaterialstoreduceenvironmentalimpact.43.Environmentaljustice:Thefairtreatmentandmeaningfulinvolvementofallpeople,regardlessofrace,color,nationalorigin,orincome,inthedevelopment,implementation,andenforcementofenvironmentallaws,regulations,andpolicies.44.Ecologicalfootprint:AmeasureofhumandemandontheEarth'secosystems,representingtheamountoflandandwaterrequiredtosupportapopulationandabsorbitswastes,basedonconsumptionpatternsandwasteproduction.45.Zerowaste:Agoalthatencouragestheredesignofresourcelifecyclessothatallproductsaredesignedtobereused,recycled,orcomposted,minimizingtheamountofwastegenerated.46.Climateresilience:Theabilityofindividuals,communities,andsystemstowithstandandrecoverfromtheimpactsofclimate-relatedextremes,suchasstorms,droughts,andheatwaves,withoutcompromisinglong-termsustainability.47.Circulardesign:Anapproachtoproductdesignthatconsiderstheentirelifecycleofaproduct,focusingonreducingwaste,promotingreuse,andensuringmaterialsarereturned