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What are individual characteristics? Give an example of an individual characteristic. Individual Characteristics are properties or physical evidence that can be attached to a common source, any examples could be something such as Nuclear DNA, tool marks, and fingerprints.
What are class characteristics and how are they different from an individual characteristic? Class characteristics are not unique to a particular object but place the particular bit of evidence into a group of objects. Individual characteristics narrow down the evidence to a single, individual source. The type of handgun with which a victim is shot is a class characteristic.
What are physical and chemical properties? Give an example of each. A physical property is an aspect of matter that can be seen or measured without changing its chemical composition. Examples of physical properties include color, molecular weight, and volume. A chemical property is observed only by changing the chemical identity of a substance. In other words, the only way to detect a chemical is to perform a chemical reaction. Examples of chemical properties are reactivity, flammability, and oxidation state.
What do forensic scientists do to collect and preserve soil samples? The combination of materials in soil may link a suspect to the crime scene if the soil is transferred to the suspects shoes or clothing. Forensic scientists compare soil samples to see if there is a match that links the suspect to the crime.
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