五下英語書第一課重點(diǎn)單詞

五下英語書第一課重點(diǎn)單詞

1.Rainforest:Arainforestisadenseforestlocatedintropicalareaswithheavyrainfallthroughouttheyear.Itischaracterizedbyahighlevelofbiodiversityandcontainsnumerousspeciesofplantsandanimals.Examplesentence:TheAmazonrainforestisthelargestrainforestintheworld.

2.Protect:Toprotectmeanstokeepsomeoneorsomethingsafefromharmordanger.Itinvolvestakingnecessarymeasurestoensurethewell-beingandsecurityofaperson,anobject,oranenvironment.Examplesentence:Weneedtoprotectendangeredspeciesfromextinction.

3.Habitat:Ahabitatreferstothenaturalenvironmentwhereaparticularplantoranimalspecieslives.Itincludeseverythingthatanorganismneedstosurvive,suchasfood,water,shelter,andsuitableclimateconditions.Examplesentence:PolarbearsliveintheicyhabitatoftheArctic.

4.Species:Aspeciesisagroupoflivingorganismsthatsharesimilarcharacteristicsandcanproduceoffspringtogether.Itisthebasicunitofclassificationinbiology.Examplesentence:Thereareover8millionspeciesofplantsandanimalsonEarth.

5.Endangered:Whenaspeciesisconsideredendangered,itmeansthatthereareveryfewofthemleftintheworld,andtheyareatriskofbecomingextinct.Examplesentence:Thegiantpandaisanendangeredspeciesduetohabitatdestruction.

6.Extinct:ExtinctreferstoaspeciesthatnolongerexistsonEarth.Itmeansthateverymemberofthatparticularspecieshasdiedout.Examplesentence:Dinosaursbecameextinctmillionsofyearsago.

7.Reserve:Areserveisanareaoflandsetasidefortheprotectionandconservationofwildlife,plants,ornaturalresources.Itaimstomaintainbiodiversityandpreventhabitatdestruction.Examplesentence:Thegovernmentestablishedanaturereservetoprotectendangeredbirds.

8.Shelter:Ashelterisaplacethatprovidesprotectionandsafetyfromharshweatherconditionsordanger.Itcanbenatural,likeacave,orhuman-made,likeahouseoratent.Examplesentence:Thehomelessseekshelterinabandonedbuildings.

9.Deforestation:Deforestationistheprocessofcuttingdownorremovingforests,usuallytomakespaceforagriculture,construction,orloggingpurposes.Itleadstothelossofhabitatsandcontributestoclimatechange.Examplesentence:TherapiddeforestationintheAmazonrainforestisamajorconcern.

10.Conservation:Conservationreferstothepreservationandcarefulmanagementofnaturalresources,includingforests,water,air,andwildlife.Itinvolvessustainablepracticestoensurethelong-termwell-beingoftheenvironment.Examplesentence:Theconservationofenergyisessentialtoreduceourcarbonfootprint.

11.Ecosystem:Anecosystemisacommunityoflivingorganisms,includingplants,animals,andmicroorganisms,interactingwitheachotherandtheirphysicalenvironment.ItisadelicatebalancethatsustainslifeonEarth.Examplesentence:Coralreefsarecomplexecosystemssupportingawiderangeofmarinelife.

12.Adaptation:Adaptationisaprocessbywhichanorganismadjuststoitsenvironmenttoincreaseitschancesofsurvival.Itmayinvolvebehavioral,physical,orphysiologicalchanges.Examplesentence:Camelshaveadaptedtodesertconditionsbystoringfatintheirhumps.

13.Pollution:Pollutionreferstothepresenceofharmfulsubstancesorpollutantsintheenvironmentthatcancausedamagetolivingorganismsandtheirhabitats.Itcanbeair,water,soil,ornoisepollution.Examplesentence:Industrialfactoriesreleasetoxicgases,contributingtoairpollution.

14.Renewable:Renewableresourcesarenaturalresourcesthatcanbereplenishedorreplacedwithinahumanlifetime.Theyincludesunlight,wind,water,andbiomass.Examplesentence:Solarenergyisarenewablesourceofpower.

15.Non-renewable:Non-renewableresourcesarenaturalresourcesthatcannotbereplenishedwithinahumanlifetime.Theyincludefossilfuelslikecoal,oil,andnaturalgas.Examplesentence:Weneedtoreduceourdependenceonnon-renewableenergysourcestocombatclimatechange.

16.Sustainable:Sustainablepracticesarethosethatcanbemaintainedwithoutcausingharmtotheenvironmentordepletingresources,ensuringlong-termviability.Examplesentence:Farmingusingsustainablemethodspromotessoilhealthandbiodiversity.17.Globalwarming:Globalwarmingisthelong-termincreaseinEarth'saveragesurfacetemperatureduetohumanactivities,primarilygreenhousegasemissions.Examplesentence:Meltingpolaricecapsareavisibleeffectofglobalwarming.18.Carbonfootprint:Acarbonfootprintisthetotalamountofgreenhousegases,especiallycarbondioxide,emittedbyanindividual,organization,event,orproductoveritslifetime.Examplesentence:Bycarpoolingtowork,individualscanreducetheircarbonfootprint.19.Recycle:Torecyclemeanstoprocesswastematerialstoproducenewproducts,whichreducestheconsumptionofrawmaterialsandenergy.Examplesentence:Plasticbottlescanberecycledintofabricforclothing.20.Compost:Compostingisthenaturaldecompositionoforganicmaterial,likefoodandyardwaste,tocreatenutrient-richsoilcalledcompost.Examplesentence:Compostingkitchenscrapscanenrichgardensoilandreducewaste.21.Energyefficiency:Energyefficiencyisthepracticeofreducingtheamountofenergyusedtoprovidethesamelevelofserviceorachievethesameoutcome.Examplesentence:Energy-efficientappliancescanlowerelectricitybillsandreduceenvironmentalimpact.22.Fossilfuel:Fossilfuelsarenaturalresourcesformedfromtheremainsofancientplantsandanimals,suchascoal,oil,andnaturalgas,whichareburnedforenergy.Examplesentence:TheburningoffossilfuelsisthemaincontributortoCO2emissions.23.Greenenergy:Greenenergy,alsoknownasrenewableenergy,isenergyderivedfromsourc