外研版 book 1 module 5 introduction ppt

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1、外研版高一年级(必修1)Module5Module5ALessoninaLabIntroductiondoinganexperimenttongscrucibledissolvesolid/liquid/gasbalanceBunsenburnertesttube1.(a)Waterexistsasasolid,aliquidandagas.(b)Waterexistsasasolidandaliquidonly.2.(a)Whenyouheatametal,itexpands.(b)Whenyouheatametal,itcontracts.Gues

2、s,listenandchecktheanswer.Listening3.(a)Steelisamixtureofironandothersubstances.(b)Steelisamixtureofironandoxygen.4.(a)Two-thirdsoftheearth’ssurfaceiswater.(b)50%oftheearth’ssurfaceiswater.5.(a)Thedistanceofthesunfromtheearthis25,5000kilometers.(b)Thedistanceofthesunfromtheearth

3、is150,500,500kilometers.6.(a)Theearthis4.6millionyearsold.(b)Theearthis4.6billionyearsold.7.(a)Theearthistwiceaslargeasthemoon.(b)Theearthisforty-ninetimeslargerthanthemoon.Putthewordsinpairsorgroups.1234air–gas-oxygencontract-expandearth–sun-moongas–liquid-solidcontractairearth

4、gasliquidoxygenmoonsolidsunexpandAnswerthesequestions.Whichoftheabovearenatural?Electricity,iron,somemetalsandairarenatural.2.Whichareman-made?Steel,somemetalsandglassareman-made.electricityironmetalsteelairglass3.Whichcanbeboth?Electricityandsomemetals(alloysforexample)canbeman

5、-madeandoccurnaturally.1.Whenyouheatametal,itexpands.expandvi.膨胀，扩张e.g.Thepetalsofmanyflowersexpandinthesunshine.许多花的花瓣在阳光中绽放。反义词contractvi.收缩n.合同e.g.Theheatcontractedthewoolensweeter.高温让羊毛衣缩小了。I'mundercontracttoteachhereforoneyear.我按照聘约要在这里教一年书。2.Steelisamixtureofironandothersu

6、bstances.mixturen.混合物e.g.Themixtureofdrinksmademefeelbad.我喝了混合饮料后很难受。mixv.混合mixAwithBsubstancen.物质e.g.Bewareofwhatyoudowiththisdangeroussubstance.你处理这些危险品时，可要当心。Doexercises5and6onpage92.Homework