which best describes obliteration in a forged document

True Color tests are more specific than microcrystalline tests in identifying a particular drug. False Chromatography tests are used to separate the drug from other substances that it might be packaged or diluted with. False Every altered document indicates that a crime has taken place. True Document examiners generally have an easy time of obtaining exemplars since most people volunteer them.

False Unlike some of the other areas of forensic science, there are often no specific tests that can be used to definitively prove that something has been forged or that it is not authentic. True Microscopes are rarely used by forensic scientists. True Most vehicles use at least four different coatings when a car is painted. True A scanning electron microscope works by shooting a beam of electrons at the item and recording the electron emissions that occur. True There is concern that ricin might be used as a potential terrorist weapon. False Cyanide was used in the infamous Jonestown Massacre. False Most drugs that are sold on the illegal market are about 95 to 99 percent pure, containing only the drug itself. Forensic scientists encounter few drug investigations in their work. Staph infections What type of sample can give information on how long someone has been exposed to a poison? Hair What did Hermann Boerhaave suggest? That poisons could be detected through chemical means What is a characteristic that would make a poison useful to someone who wanted to intentionally poison someone? The substance's taste or odor is easily hidden The substance is easy to administer The substance is easily found and accessible. The Van Urk-Salkowski test is used when which drug is suspected? LSD Which group of drugs includes legal painkillers such as Ox圜ontin? Narcotics The Scott Test is used when which drug is suspected? Cocaine Which group of drugs slows down the central nervous system? Depressants Ecstasy is one example of which of the following? Club drugs Forensic scientists can use which of the following to test for the presence of drugs in a human? Blood Hair Saliva In the Marquis Color Test, the solution will turn what color in the presence of opiates? Purple Stimulants are also called what? Uppers Which type of test helps forensic scientists to narrow down the possibilities of what drug a substance may be? Screening test What is the most commonly and widely used depressant in the United States? Alcohol Taking a cross section of a fiber can reveal what? The shape of the fiber What are substances that provide support or structure for the pigment in paint? Binders Which microscope has the highest potential magnification? Scanning electron microscope Gas chromatography can be useful in determining what about paint? Its chemical composition How many layers of paint are there on the typical manufactured vehicle? Four What is PDQ? A paint database When a polarized white light is sent through a synthetic fiber, how many perpendicular rays are created? Two A compound microscope has how many lenses? Two A microspectrophotometer measures which of the following? Light absorption Pigment does what to paint? Gives it color The philosopher Socrates was executed using which poison? Hemlock What is used in a Reinsch test? A copper strip Toxicology is the study of what? Substances that have an adverse effect on living organisms Which poison is produced by vehicle exhaust and fires? Carbon Monoxide Women's bane or wolfsbane is another term for which poison? Aconite Which poison was used in the Jonestown massacre? Cyanide The high rate of death during the 1918 Spanish influenza was possibly due, in part, to what? Scarlet fever

Which best describes obliteration in a forged document