100%(4)4 out of 4 people found this document helpful
This preview shows page 1 - 8 out of 36 pages.
Chapter 1Matter,Measurement,and ProblemSolving
Physical ChangesChanges in MatterChemical ChangesChanges that alterstate or appearance(not composition)Changes that alterchemical composition
Physical Changes•When water boils,it changes into agas•Its chemicalcomposition is notchanged•Water moleculesare the same inthe gas phase asin the liquid phase
Chemical Changes•The rusting of iron is achemical change•The iron atoms combinewith oxygen in the air toform a different chemicalsubstance (iron oxide)
Properties of MatterPhysical propertiesare the characteristics of matter that canbe changed without changing its composition– characteristics that are directly observable– Examples:•state, size, mass, volume, color, odor, melting point, boilingpoint, density, solubilityChemical propertiesare the characteristics that determinehow the composition of matter changes as a result ofcontact with other matter or the influence of energy– characteristics that describe the behavior of matter– Examples:•Flammability, corrosiveness, bleaching power explosiveness
Question 7:Liquid waterABCThe diagram on the left represents liquid water.