科学物质的世界(Science - the world of matter).doc

科学物质的世界(Science - the world of matter).doc科学 物质的世界(Science-theworldofmatter)Secondunitmaterialchangethematerialaroundus[teachingobjectives]:oncept:Theworldismadeupofmatter,thematterischanged,,andsomechangesdonotproducenewsubstances・Processandmethod:pare,analyzeandclassifymaterialchangesbymeansofexample,analysis,,toexperieneechangesinmaterial・Emotions,attitudes,values:theworldisrecognizedasmaterialandmaterialisconstantlychanging.[teachingfocus]:throughspecificexperiments,toexperiencematerialchanges・[teachingdifficulties]:indirectlyfeeltheexisteneeofabstractsubstancesandmaterialchanges・[teachingpreparation]:Teacher:plasticbags,popcansandwatericingpicturesStudent:candles,matches,ironembroidery,nailsandpaper[teachingprocess]:First,tounderstandthatthewor1dismadeupofmattertheintroductionoftheenvironment:Toobserveoursurroundings,whatconstitutesourclassroom?Studentsspeakfreely(mostoftheobjectsareexpectedtobevisible)・Theteacherpointsoutthatobjectsthatwecanobservedirectlycanbecalledmatter・deepintothediscussion:ourclassroomisnotonlytheexistenceofthesecanseethetouchofthematerial,andwecannotdirectlyfeeltheair,fire,sound,electricity,light,theyaresubstances?Proposeadiscussionandaskthestudentstolisttheevidenceandthereasons・teachersinvolvedinthedefinitionofabstractmaterial:mentsontheviewsofstudents,airsamplesnecessarytoprovethecase,plasticbagsproved・positionoftheclassroom・summary:whethertheactualexistenceofthematerial,anscanfeelthematerial,itshowsthatthewholeworldismadeofmaterial・Two,thetransitionmaterialchanges:Taketheclassroomasanexample・Thematerialslistedbythestudentsintheclassroomareallthesameandhavenochangeatall?Thestudents,Unionlistsmanychanges,:inourclassroom,therearetwokindsofmaterialsbroughtbytheteacher-cansandwatericepictures・Discussion:pinchflatcansandwater,iceisalsoamaterialchange,whataretheythesameanddifferent