Ifweviewascienceasabodyofsystematizedknowledge,thenchemistryisusuallycalledanaturalsciencebecauseit(1)_______knowledgeofthenaturalworld.(2)_______wemaywonder(3)_______thereisnocompletesystem(4)_______allofchemistryfitsperfectly.Gapsinthepresentsystem,however,showthatchemistryisstilla(5)_______subjectandthatwe(6)_______allofitsfacts,lawsandtheories.(7)_______,chemistryasascienceisverymuch(8)_______ustoday,anditsfutureholdsthebrightpromise(9)_______muchmoretocome.
Man'sknowledgeabouthimselfandnaturehasgrowninto(10)_______sciences.Thegrowthoftheseparatesciences(11)_______moredevelopmentalthanintentional.Theseparationofthenaturalscienceintophysicalandbiologicalsciences,andphysicalsciencesintophysicsandchemistry,happily(12)_______alargerbodyofknowledgeintomoremanageableparts.Atthesametimewe(13)_______thattheconcepts,techniquesandapplicationsofthevarioussciencesareinterdependentandnotexclusivelyapartofonescienceor(14)_______.Inthis(15)_______,chemistryisakeyscience(16)_______thenaturalsciencesbecauseeveryone,(17)_______theareaofnaturalsciencehewishestopursue,(18)_______atleastanintroductiontotheprinciplesandsimplerapplicationofchemistryasafoundationforhisspecialty.
Chemistrydealswiththe(19)_______ofmatter,changesinmatter,thelawsandprinciples(20)_______thesechanges,andtheconceptsandtheoriesthatinterpretthem.
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