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Unformatted text preview: Physical Properties Physical Properties Glass and Soil Glass and Soil Goal Goal Individualize evidence to a single source ( individual characteristic) Greater evidential value with unique identity Scientist searches for distinctive properties on the road to individualizing evidence Properties Properties Definition: Identifying characteristics of a substance Useful in characterizing evidence Glass and soil Glass is combination of earth materials like sand To understand nature of properties, begin with broad categories I. Background I. Background A. What are the two broad categories of properties? Physical and chemical I. Background I. Background B. Physical properties describe substance without reference to any other substance 1. Five physical properties are- color- weight- volume- melting point- boiling point I. Background I. Background 2. Chemical properties describe behavior of a substance when it combines or reacts with another substance Example: Marquis spot color test for heroin PDF Created with deskPDF TS PDF Writer - DEMO :: http://www.docudesk.com Mass vs. WeightMass vs....
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- Fall '11