Forensic Science Module Three – Flashcards
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What is the first step in recording an impression?
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Taking a photograph
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How long do casts of impressions need to sit before they can be analyzed?
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24 hours
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Class characteristics are those associated with what?
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A group
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Which of the following might be an individual characteristic in an impression?
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A broken tread
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What is the frequency of an event?
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Probability
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For glass fragments to be individualized, what must be true?
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They must fit together
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What properties are those that describe what happens when a substance reacts with another substance?
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Chemical properties
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When the drug heroin comes into contact with the Marquis reagent chemical what happens?
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It turns purple
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A ridge characteristic describes a property found where?
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Fingerprints
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What is evidence that is used to help recreate or illustrate a crime?
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Demonstrative evidence
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Plaster of Paris is often used to create casts of impressions today.
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False
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Fingerprints cannot be used to identify particular people.
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False
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Physical properties are those that an object or trace evidence has with just its physical existence, without altering it in any way with chemicals.
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True
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Impressions are easy to find individual characteristics in.
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False
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The chemical composition of glass varies widely from manufacturer to manufacturer.
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False
