Module5 A Lesson in a Lab

Module5ALessoninaLabIntroduction,readingandvocabularyexistsolidliquidmetalexpandcontractmixturesubstanceoxygensurface•Readthroughthequestionsquicklyandfindouttheanswerstothem.•1.Howdoeswaterexist?•2.Ifyouheatametal,whatchangewillhappen?•3.Whatissteelmadefrom?•4.Whatistheearth'ssurfacemainlycoveredby?•5.Howfaristhesunfromtheearth?•6.Howoldistheearth?•7.Whichislarger,theearthorthemoon?Suggestedanswers•1.Waterexistsasasolid,aliquidandagas.•2.Whenyouheatametal,itexpands.•3.Steelisamixtureofironandothersubstances.•4.Two-thirdsoftheearth'ssurfaceiswater.•5.Thedistanceofthesunfromtheearthis•150,500,500kms.•6.Theearthis4.6billionyearsold.•7.Theearthisforty-ninetimeslargerthanthe•moon.Putthesewordsinpairsorgroups.•aircontractearthgasliquid•oxygenmoonsolidsunexpandair---gas---oxygenearth---sun---mooncontract---expandgas---liquid---solidAnswerthesequestions•1.Whichofthefollowingarenatural?•2.Whichareman-made?•3.Whichcanbeboth?•electricityironmetal•steelairglassSuggestedanswers•1.electricity,iron,somemetalsandair•2.steel,somemetalsandglass•3.electricityandsomemetalsPutthesewordsinthecorrectordertodescribethestagesofascientificexperiment.•conclusionaimresultmethodAim----method----result----conclusionreactionelectricalequipmentreactpotassiumsodiumcalciummagnesiumaluminiumzincpartialcopperoxiderustboilordinarysteamfloatformdissolve•1.Achemical______isaprocessinwhichtwosubstancescombinetogetherchemicallytoformanothersubstance.2.______meansallthespecialtools,machines,clothesetcthatyouneedforaparticularactivity.3.Whenonechemicalsubstance____withanother,orwhentwochemicalsubstandes____,theycombinechemicallytoformanothersubstance.•4.Youuse____torefertosomethingthatisnotcompleteorwhole.reactionEquipmentreactsreactpartial•5.Whenametalobject___,itbecomescoveredwithrustandoftenlosesitsstrength.•6.Wheahotliquid___orwhenyou___it,bubblesappearinitanditstartstochangeintosteam.•7._____peopleorthingsarenormalandnotspecialordifferentinanyway.•8.Somethingthat____liesonorjustbelowthesurfaceofaliquidwhenitisputinitanddoesnotsink.•9.Ifasubstance______inaliquidorifyou_____it,itbecomesmixedwiththeliquidanddisappears.rustsboilsboilOrdinaryfloatsdissolvesdissolve•1.Whichofthemetalsinthetablereactsthemostwithoxygenandwater?•2.Whathappenswhenyouheatcalciuminoxygen?•3.Whichmetalsreactwithsteam?•4.Doesironhaveasloworfastreactionwith•steam?•5.Doescopperreactwithwater?Potassium,calciumandsodiumItburnstoformanoxide.Magnesium,Aluminiumandzinc.Ithasaslowreaction.No,itdoen’t.PutthefollowingmetalsintherightorderaccordingtoPassageA.•1.zinc2.sodium3.copper4.magnesium5.potassium6.aluminium7.calcium5----2----7----4----6----1----3DecidewhetherthesestatementsaretrueorfalseaccordingtoPassageA.•1.Differentmetalshavedifferentuses.•2.Thereactionofmetalswithdifferentsubstancesisthesame.•3.Magnesiumcanformanoxidewhenheatedinoxygen.•4.Ironreactswithcoldwater.•5.Copperreactsmostwhenheatedinoxygen.TFTFFPleasereadPassageBquicklytofindouttheanswerstothequestions.•1.Whatisthereonthesurfaceofthewaterinthetesttube?•2.Whatistheuseoftheoil?•3.Whatistheuseofthecottonwoolinthetesttube?•4.Whyarethenailsinthetesttubewithordinarywaterrusty?Thereisoilonthesurfaceofthewaterinthistesttube.Theoilcankeepairoutofwater.Thecottonwoolcankeepairdry.Ironreactswithwaterandformsrust.FillintheblanksaccordingtoPassageBIronindryairIroninair-freewaterIroninordinaryairStageA(Startingexperiment)nailsoillayernailsnailsStageB(1weeklater)nailsoillayerwaternailsnailsStageC(Result)cottonwoolcottonwoolIrondoesnotrustwaterIrondoesnotrustwaterwaterIronrustsReadPassageBagainandcompletethesentences.•.Inthefirstpartoftheexperiment,the___isdry,notwet.•Itshowsthatiron_____________whentheairisdry.•Inthesecondpartoftheexperiment,youmust___thewatertomakesurethereisno__init.•Youadd______tothewaterbecausethiskeeps___outofit.•Itshowsthat___doesnotrustinwaterthathasno___init.airdoesnotrustboilairsomeoilairairnailLanguagepoints•exist•heat•expand•contract•react•burn•form•thinkof•put…inorder•atthetop/bottom•adescriptionof•findout•makesure•keep…outof•add…to…Sentencepatterns•Theearthistwiceaslargeasthemoon.•.Theearthisforty-ninetimeslargerthan•themoon.•Itishardtothinkofaworldwithout•metals.•Hereisatable.HOMEWORK•1.Trytorememberthenewwordsinthistext.•2.Describeascientificexperimentusingwhatwehavelearnedinthetext.