Ch. 12 Trace Evidence II Review

The techniques of neutron activation analysis was used to determine the antimony and silver concentrations in the bullet fragments from the assassination of ________________.

• Lee Harvey Oswald

• Governor John Connally

• President John F, Kennedy

• Mrs. Jacqueline Kennedy

Small quantities of elements that are present in most substances in concentrations of less than 1% are known as___________________ _____________________.

• alpha particle

• trace elements

• emission spectrum

• atomic number

Describe the structure of an atom of an element.

Forensic analysis of the bullets recovered after the assassination of President John F. Kennedy focused on the concentration of what two elements?

• hydrogen and oxygen

• uranium and thallium

• silver and gold

• antimony and silver

Gas chromatography and infrared spectrophotometry are two methods used to analyze and identify what?

• Paint on automobiles

• soil at a crime scene

• bullets recovered from a body at a crime scene

• fingerprints and blood found at a crime scene

The database for obtaining information relating to an automobile's make, model and year is called ____________.

• PDQ

• CODIS

• SICAR

• IAFIS

How should soil evidence on a shoes be collected and packaged?

• Collected at the crime scene by scraping the dirt into an airtight container for later analysis

• Place shoes in an airtight plastic bag and transport to the laboratory

• Individually wrap each shoe in paper and transport to the laboratory

• Should not be collected; soil is of no evidentiary value

Two chemical tests commonly performed on soil samples to be part of the soil profile include:

• pH and phosphate

• nitrate and silver

• pH and mica

• nitrogen and uranium

Another soil analysis techniques is the use of a density gradient tube, which shows the relative __________ of the soil sample.

• mass

• volume

• weigh

• density

A Swedish dentist used forensic hair analysis techniques to determine that Napoleon was possibly poisoned by _______________.

• ricin

• arsenic

• thallium

• radioactive polonium