試驗(yàn)室題目及答案英語

一、單項(xiàng)選擇題（每題2分，共10題）1.Whatisthecommonsymbolfor“l(fā)aboratory”inEnglish?A.libB.labC.lub2.Whichtoolisusedtomeasureliquidvolumeprecisely?A.BeakerB.FlaskC.Pipette3.Safetygogglesareusedtoprotectour______.A.handsB.eyesC.face4.Thesubstancethatcanchangecolorinanacid-basereactioniscalleda(n)______.A.indicatorB.catalystC.reactant5.Toheatsubstancesinthelab,weoftenusea______.A.BunsenburnerB.microwaveC.oven6.Whichgasisproducedwhenmetalreactswithacid?A.OxygenB.HydrogenC.Nitrogen7.Whatdoes“flammable”mean?A.CanbeeasilybrokenB.CancatchfireeasilyC.Candissolvequickly8.Abalanceisusedtomeasurethe______ofsubstances.A.volumeB.temperatureC.mass9.Whenwemixtwosubstancestogetherandanewsubstanceisformed,itisa______change.A.physicalB.chemicalC.temporary10.Whichequipmentisusedtoholdsmallamountsofsubstancesforheating?A.TesttubeB.ErlenmeyerflaskC.Petridish二、多項(xiàng)選擇題（每題2分，共10題）1.Whichofthefollowingaresafetyrulesinthelaboratory?A.WearsafetygogglesB.EatanddrinkinthelabC.Followteacher'sinstructions2.Toolsformeasuringinthelaboratoryinclude______.A.ThermometerB.RulerC.Measuringcylinder3.Commonacidsinthelaboratoryare______.A.HydrochloricacidB.SulfuricacidC.Citricacid4.Whichsubstancesareusuallyusedascatalysts?A.EnzymesB.MetalslikeplatinumC.Salts5.Whenheatingaliquidinatesttube,weshould______.A.PointthetesttubeawayfrompeopleB.HeatitevenlyC.Fillthetesttubecompletely6.Examplesofphysicalchangesare______.A.MeltingiceB.BurningwoodC.Dissolvingsaltinwater7.Protectiveequipmentinthelabmayinclude______.A.GlovesB.LabcoatsC.Earplugs8.Chemicalreactionscanbeidentifiedby______.A.ChangeincolorB.FormationofgasC.Releaseofheat9.Whichglasswarecanbeusedformixingsubstances?A.BeakerB.FlaskC.Funnel10.Substancesthatareoftenusedinchemicalexperimentsare______.A.SodiumhydroxideB.CoppersulfateC.Calciumcarbonate三、判斷題（每題2分，共10題）1.It'sokaytotouchchemicalswithbarehandsinthelab.（）2.Athermometerisusedtomeasuremass.（）3.Allchemicalsinthelabaredangerous.（）4.Whenheatingasubstance,weshouldstartwithahighflame.（）5.Physicalchangesalwaysinvolvetheformationofnewsubstances.（）6.Acatalystcanspeedupachemicalreactionwithoutbeingconsumed.（）7.Wecanpourwastechemicalsdirectlyintothesink.（）8.Agraduatedcylinderismoreaccuratethanabeakerformeasuringvolume.（）9.Mixingoilandwaterisachemicalchange.（）10.Safetysignsinthelabarejustfordecoration.（）四、簡答題（每題5分，共4題）1.Listtwoimportantsafetyprecautionsinthelaboratory.Answer:Wearsafetygogglestoprotecteyesandfollowteacher'sinstructionstoavoidaccidents.2.Whatisthedifferencebetweenaphysicalchangeandachemicalchange?Answer:Aphysicalchangedoesn'tformnewsubstances,likemeltingice.Achemicalchangeformsnewsubstanceswithdifferentproperties,likeburningpaper.3.NameonecommonuseofaBunsenburnerinthelaboratory.Answer:Itisusedtoheatsubstancesduringexperiments,forexample,heatingaliquidtoobserveitsboilingpoint.4.Whyisitimportanttolabelchemicalcontainers?Answer:Toclearlyidentifythesubstancesinside.Thishelpspreventmistakes,suchasusingthewrongchemical,andensuressafety.五、討論題（每題5分，共4題）1.Discusstheimportanceofwearingappropriateprotectiveequipmentinthelaboratory.Answer:Protectiveequipmentlikegoggles,glovesandlabcoatssafeguardusfrompotentialhazards.Gogglesprotecteyesfromsplashes,glovespreventskincontactwithharmfulchemicals,andlabcoatsshieldourbodies.Itensuresoursafetyduringexperiments.2.Howcanweensureaccuratemeasurementsinthelaboratory?Answer:Usecalibratedmeasuringtoolscorrectly.Readthescaleateyelevelforaccuratevolumeormassreadings.Also,makesurethetoolsarecleanandingoodconditionbeforeuse.3.Whatshouldwedoifthereisasmallchemicalspillinthelaboratory?Answer:First,alerttheteacher.Then,followsafetyprocedures.Fornon-toxicspills,useabsorbentmaterialstocleanitup.Fortoxicspills,waitfortheteacherorsafetypersonneltohandleitproperly.4.Shareyourthoughtsontheroleofteamworkinlaboratoryexperiments.Answer:Teamworkiscrucial.Memberscandividetasksaccordingtotheirstrengths,likeonepreparingmaterialsandanotherrecordingdata.Italsoallowsforsharin