Reading
Readthepassageasquicklyasyoucanandchoosethebesttitleforit.TheDifferentUsesofMetalsTheReactionofMetalsTheReactionofMetalswithOxygenPassageA
Wecanreachaconclusionthatitisimportantforustoreadbooks.
Itisouraimtobuildupaharmonioussociety.
Itisapieceofelectricalequipment.
Thestonecontainspotassium.
sodium
calcium
magnesium
Thewheelismadeofaluminum.
zinc
oxide
Nailsareeasytorustinthedampair.
Waterboilsat100°C.
Readthepassageagainandanswerthefollowingquestions:1.Whichofthemetalsinthetablereactsthemostwithoxygenandwater?Potassium,calciumandsodium.2.Whathappenswhenyouheatcalciuminoxygen?Itburnstoformanoxide.
3.Whichmetalsreactwithsteam?Magnesium,aluminiumandzinc.4.Doesironhaveasloworfastreactionwithsteam?Ithasaslowreaction.5.Doescopperreactwithwater?No,itdoesn’t.
Readthepassageandfillinthechart.PassageBIronindryairIroninair-freewaterIroninordinarywaterStageA(startingexperiment)cottonwoolwaterwater
StageB(1weeklater)StageC(Result)nailswaterIrondoesnotrustIrondoesnotrustIronrusts
1.Inthefirstpartoftheexperiment,the___isdry,notwet.2.Itshowsthatiron___________whentheairisdry.3.Inthesecondpartoftheexperiment,youmust____thewatertomakesurethereisno____init.airdoesnotrustboilairReadthepassageagainandcompletethesentences.
4.Youadd_________tothewaterbecausethiskeeps____outofit.5.Itshowsthat____doesnotrustinwaterthathasno____init.someoilairnailair
CompletethepassagewithproperwordsaccordingtoPassageAandB.Itishardtothinkofaworldwithoutmetals.Differentmetalshavedifferentuses,forexample,ironcanbeusedin________equipment.Butaboveallweshouldknowwhetheritwill____underelectricalreact
differentconditions.Otherwiseitwillkeeptheequipment