外研版高一年级(必修1)Module5tongscrucibledissolvesolid/liquid/gasbalanceBunsenburnertesttubetesttube1.(a)Waterexistsasasolid,aliquidandagas.(b)Waterexistsasasolidandaliquidonly.2.(a)Whenyouheatametal,itexpands.(b)Whenyouheatametal,itcontracts.Guess,listenandchecktheanswer.Listening3.(a)Steelisamixtureofironandothersubstances.(b)Steelisamixtureofironandoxygen.4.(a)Two-thirdsoftheearth’ssurfaceiswater.(b)50%oftheearth’ssurfaceiswater.5.(a)Thedistanceofthesunfromtheearthis25,5000kilometres.(b)Thedistanceofthesunfromtheearthis150,500,500kilometers.6.(a)Theearthis4.6millionyearsold.(b)Theearthis4.6billionyearsold.7.(a)Theearthistwiceaslargeasthemoon.(b)Theearthisforty-ninetimeslargerthanthemoon.Putthewordsinpairsorgroups.Putthewordsinpairsorgroups.contractairearthgasliquidcontractairearthgasliquidoxygenmoonsolidexpandsunoxygenmoonsolidexpandsuncontractairearthgasliquidcontractairearthgasliquidoxygenmoonsolidexpandsunoxygenmoonsolidexpandsun11223344air–gas-oxygencontract-expandearth–sun-moongas–liquid-solid1.liquid:液体2.expand:vi.使......膨胀Metalsexpandwhentheyareheated.3.contractvi.收缩Metalscontractastheygetcooler.4.substancen.物质5.mixturen.混合物6.oxygen氧气7.electricityn.电Answerthequestions.1.Whichoftheabovearenatural?Electricity,iron,somemetalsandairarenatural.2.Whichareman-made?Steel,somemetalsandglassareman-made.electricityironmetalsteelairglass3.Whichcanbeboth?Electricityandsomemetals(alloysforexample)canbeman-madeandoccurnaturally.ListeningandwritingListeningandwritingYouwillhearaconversationinwhichateacherhelpsastudentdoanexperiment.ReadtheAimbelowandpredicttheResult.Aim:Tofindoutifthereisachangeinweightwhenthemetalmagnesiumburnsinair.Result:__________________________.Aim:____________________________________________________________________Tofindoutifthere’sachangeinweightwhenmagnesiumburnsinair.Listenandcompletethedescriptionofthescientificexperiment.Apparatus:____________________________________________Method:_________________________________________________________________________________________________________________________________________________________________________________________Magnesium,Bunsenburner,abalance,acrucible.First,putthemagnesiuminthecrucible.Thenputthecrucibleonthebalanceandweighit.Next,heatthemagnesium.LighttheBunsenburnerandholethecrucibleoverit.Finallyweighthemagnesiumagain.Result:_____________________________Conclusion:____________________________________________________Itweighsalittlemorethanbefore.Thereisachangeinweightwhenmagnesiumburnsinair.1.“Wheredowegofromhere?”means______.A.Whatshallwedonext?B.Isthistherightway?2.“Keepthenoisedown”means____.A.Don’ttalkB.TalkquietlyChoosethecorrectmeaning.3.“You’vegotit”means________.A.You’veunderstoodB.Youhavesomething4.“Goahead!”means________!A.GoawayB.Begin5.“It’syourturn”means_______.A.You’renextB.TurnroundDecidewhattheaimoftheexperimentis.ListeningandspeakingonPage95Theaimistowriteasecretmessage.Putthestagesinthecorrectorder.1.2.3.4.bsqueezelemonandpourthejuiceintoacontainerfdipyourpenintothejuiceawriteyourmessageonapieceofpapergblowonthepapertodrythelemonjuice5.elightacandle6.cheatthepaperinthecandleflame7.dthemessageappearswhenthejuicereactswithoxygenandproducesbrownoxideHomeworkPreviewVocabularyonPage46.
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