L3-U2懂你英语[文档标题]L3-U2-1/4listeningScienceMatter'sstate/test1AMatterismadeofatomsandmolecules.1.WaterforexampleistheH2Omolecules.2.Thismeansthatthemoleculeofwaterhasthreeatoms.3.Awatermoleculehastwohydrogenatomsandoneoxygenatom.4.Substanceslikesugarhasmanyatomsintheirmolecules.5.Amoleculeofsugarhasmanyatomsincludingcarbon,hydrogenand6.oxygen.Bmolecule.watertheasH2O,whichismade1.MatterisofmoleculessuchMattercanbeinoneofthreestatessolid,liquidorgas.2.Waterandicearethesamesubstance,buttheyareindifferent3.states.Thesestatesdependonthetemperatureofthemolecules.4.taketrytoandthesubstance,themoleculesmovefasterwe5.Whenheatupmorespace.Whenwecoolsubstance,themoleculesmovemoreslowly.6.Whenwecoolasubstancetoitsfreezingpoint,itbecomesasolid.7.CInasolid,themoleculesmoveverylittle.1.Theirpositionsarealmostfixed.2.3.Tobefixedmeansthattheirpositionsdon'tchange.other.fromandmovemolecules,heatIf4.wethetheyfasterawayeach2[文档标题]5.Thesolidbeginstomeltlikeicecreamonahotday.D1.Atacertaintemperature,asolidbeginstochangeintoaliquid.2.Thetemperatureatwhichissolidchangesintoaliquiddependsonthesubstance.3.Forwater,thesolidbeginstochangeintoaliquidwhenitstemperaturerisestoabovezerodegreesCelsius.4.Forsomesubstances,suchassteel,thetemperaturewhichitbecomesaliquidismuchhigher.5.Steeloftenmeltsaroundonethousandthreehundredseventy(1370)degreesCelsius.E1.Ifwecontinuetoheataliquid,themoleculesmoveevenfaster.2.Atacertaintemperature,theliquidbeginstochangeintoagas.3.Forwater,theliquidbeginstochangeintoagasatahundreddegreesCelsius.4.Thisistheboilingpointofwater.F1.Insideastar,suchasoursun,thetemperatureisveryhigh.2.Everythinginsidethesunisagas.3.Accordingtoscientists,thereareoversixty-fiveelementsinsidethesun.4.Thisincludeoxygenandiron.5.Overnightypercentofthesunishydrogengas.G1.Yesterdaytherewasanimportantsciencetest.2.Lisa,Tomandtwentyotherclassmatestookthetest.3[文档标题]3.Thetestwasaboutthestatesofmatterandhowtheyaredifferent.4.Thereweretwenty-fivequestionsonthetestandtheyhadforty-fiveminutestotakeit.H1.Herearesomeofthetestresults.2.Twostudentsgotperfectscores.3.Thelowestscorewassixty-eightoutofonehundred.4.Theaveragescorewaseighty-sixpointthree(86.3).5.Elevenstudentsscoredhigherthanaverage.6.Elevenstudentshadbelowaveragescores.I1.Tommissedtwoquestionsonthetest,sohisscorewasninety-two.2.Hisscorewastheeighthhigherintheclass.3.Lisamissedtwoandhalfquestions,soherscorewasninety.4.Herscoredwasthetenthhighestscore.5.Herscorewasfourpointshigherthantheaveragescore.J1.Lisawasdisappointedwithhertestresults.2.Shestudiedhardforthetest,butshestilldidn'tdowell.3.Asaresult,sheplanstostudyhardforthenexttest.4.Thenexttestwillbeinabouttwoweeks.K1.Tomwassurprisedandhappywithhistestresults.2.Hedidn'tstudyhardsohisresultwasbetterthanheexpected.3.HewasalsohappythathedidbetterthanLisadid.L3-U2-1/4vocabulary4[文档标题]Expression(表情)/hobbyA1.Sheisscreamingbecausesheisreallyscared.2.Somethingischasinghersosheisscreamingforhelp.3.He'sshoutingbecauseheisangry.4.Whenhe'sreallyangry,heoftenshoutslikethis.5.She'ssleeping,becauseshe'stired.6.Lastnightshedidn'tgetenoughsleep,sotodayshehasnoenergy.7.She'scrying,becauseshe'ssad.8.Shegotsomebadnewsafewminutesago.9.She'ssmilingbecauseshe'shappy.10.Herboyfriendjustcalledinhisreturningfromalongtrip.B1.Thismanishikingupamountaintrail.2.He'swearinghikingbootsandiscarryingapackonhis...