外研版英语必修1module5reading课件.ppt

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1、Module5AlessoninalabReadthepassageasquicklyasyoucanandchoosethebesttitleforit.TheDifferentUsesofMetalsTheReactionofMetalsTheReactionofMetalswithOxygenPassageAReadthepassageagainandanswerthefollowingquestions:1.Whichofthemetalsinthetablereactsthemostwithoxygenandwater?potassium,calciuma

2、ndsodium2.Whathappenswhenyouheatcalciuminoxygen?Itbeginstoformanoxide.3.Whichmetalsreactwithsteam?Magnesium,aluminiumandzinc4.Doesironhaveasloworfastreactionwithsteam?Ithasaslowreaction.5.Doescopperreactwithwater?No,itdoesn’t.Readthepassagecarefullyandfillthechartonpage45.Readthepassag

3、eagainandcompletethesentences.PassageB1.Inthefirstpartoftheexperiment,the__isdry,notwet.2.Itshowsthatiron___________whentheairisdry.3.Inthesecondpartoftheexperiment,youmust___thewatertomakesurethereisno__init.airdoesnotrustboilair4.Youadd_______tothewaterbecausethiskeeps__outofit.5.Its

4、howsthat___doesnotrustinwaterthathasno__init.someoilairnailairCompletethepassagewithproperwordsaccordingtopassageAandBItishardtothinkofaworldwithoutmetals.Differentmetalshavedifferentmetalshavedifferentuses,forexample,ironcanbeusedin________equipment.Butaboveallweshouldknowwhetheritele

5、ctricalwill____underdifferentconditionsotherwiseitwillkeeptheequipmentfromworkingwell.Asweallknow,ifironisheatedinoxygen,itwillreactslowlybutwillnotforman_____.reactoxideOntheotherhand,ifitisputtogetherwithwateror_____,therewilla______reaction.Nextlet’sdoan__________tosupporttheabove.F

6、irst,getatesttubefilldewithwaterandputitoverthe_____________to___forthreeminutes.steampartialexperimentbunsenburnerboilThenputthreeorfourcleannailsinthewaterwithsomeoiladdedtoitandleavethetubeforoneweek.Whathappens?Theirondoesnot____inair-freewater.Anotherexperiment,ifyouputthenailsint

7、hetubewiththeairinitforoneweek,thenwhathappens?Ironrustsin_______water.rustordinaryReadaboutanincidentduringachemistrylessonandchoosethebestsummary.ReadingonP93Astudentdidn’tfollowtheinstructionscarefully.Hetookthewrongliquidfromthecupboardandnearlypoisonedtheclass.2.Thechemistryteac