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1、SCIENCEANDTECHNOLOGYTheworldweliveinischangingfast!Forexample,modernhousesaredifferentfromtraditionalones.Theyaremadeofnewmaterialssuchasconcrete,ironandglassinsteadofnaturalmaterialssuchasstone,woodandleaves.Insideamodernhousewefindelectriclights,refrigerators
2、,gascookers,radios,televisionsets-perhapsevencomputers.Peopleareusuallymuchhealthierthantheyusedtobe.Weexpecttolivelongerthanourancestors.Manyofuswearnewkindsofclothes,madefromnewkindsofcloth.Weeatdifferentfoodsfromourancestors,andpreparethemdifferently.Wealsot
3、ravelfurtherandfasterthantheydid.Theywalked,orrodeananimal,orpaddledacanoe.Nowweuseabicycle,acar,atruckoramotorboat.Therearealsomuchlargervehiclesthatcarrymanypeopleandmovehugeloads.Wecanflylongdistancesatgreatspeedsinaeroplanes.Wecanpickupatelephoneandspeaktop
4、eoplewhoarefaraway.Andwelearnaboutimportanteventsallovertheworld,astheyarehappening,bylisteningtotheradio,watchingtelevisionor'goingontheinternet'.Insomeplaces,changeslikethesestartedlongagoandhappenedveryslowly.Inotherplaces,changeismuchmorerecentandhashappene
5、dveryquickly.TraditionallifeModernlifeWhenourgrandparentswereyoung,itwouldhavebeendifficultforthemtoimaginesomeofthemarvelsofthemodernworld.Whathascausedalltheseamazingchanges?Theanswerisscienceandtechnology!Scienceisamethodusedbypeoplecalledscientiststofindout
6、abouttheworldaroundus.Sciencealsoreferstotheknowledgethatscientistshaveobtained.Technologyishowweapplyourknowledgeandexperiencetomakethingsanddothingsthatareusefultous.10INTERESTINGSCIENCEFACTS1-11/Ittakes8minutes17secondsforlighttotravelfromtheSun’ssurfacetoth
7、eEarth.2/10percentofallhumanbeingseverbornarealiveatthisverymoment.3/EveryyearoveronemillionearthquakesshaketheEarth.4/Everyyearlightningkills1000people.5/Ifyoucoulddriveyourcarstraightupyouwouldarriveinspaceinjustoveranhour.6/TheEarthis4.56billionyearsold…thes
8、ameageastheMoonandtheSun.7/Onemillion,million,million,million,millionthofasecondaftertheBigBangtheUniversewasthesizeofa…pea.8/ThetallesttreeeverwasanAustralianeucalyptus–In1
