1. Test Review: Lab Tools and Techniques of the Forensic Scientist

2. Which of the following provides a “chemical fingerprint?”
Any screening test
Gas chromatography
Mass spectrometry
TLC
FTIR
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3. Gas chromatography…
Separates solids by running a thin liquid over a gas.
Is a high speed separation technique.
Is a confirmation test.
Produces a mass spectrum.
Is never used with a mass spectrometer.
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4. A colorimeter Is a mass spectrometer Produces a chromatogram
Is the same as FT-IR
Measures absorbance
Is a lot like TLC
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5. The color of light depends on its
Amplitude
Wavelength/frequency
Speed
medium
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6. A test that identifies a material based on the color and shapes of crystals formed when mixed with a particular reagent is..
Microcrystalline
Colorimetry
Spectrophotometry
Gamma testing
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7. In any kind of chromatography,
The analyte moves through a gas.
There is a mobile and a stationary phase.
There are multiple components being separated.
There is a positive identification of a material when done.
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8. A gas chromatogram shows
Absolute identities of substances
Peaks at times when components come together.
Peaks on a graph of retention time, showing when the different components come out of the gas.
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9. Ability to chemically react with the solvent.
When we talk about the “affinity” of a material to one phase or another, we are referring to its
Ability to chemically react with the solvent.
Attraction toward a particular phase
Mass ratio
Hatred for that particular phase.
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10. Color tests… are generally quantitative in nature.
are usually confirmatory/definitive.
provide a positive identification of a material.
are considered qualitative, screening/presumptive tests.
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11. Beer’s Law… Is not real- our teacher made it up.
Relates the distance traveled by an analyte to the distance traveled by a solvent.
Compares the amount of alcohol required to intoxicate one person to the amount required for a different person.
Describes the relationship between concentration and absorbance/transmittance of light through a sample.
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12. The use of a blank prior to completing any measurement is to
Zero/calibrate the sensor
Determine the mass of the material
Allow the sensor to warm up
Tell the computer interface the appropriate unit of measurement
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13. To calculate the Rf value for a particular component, you need to
Measure the distance that component traveled.
Measure the distance that the solvent traveled.
Divide the distance traveled by the component by the distance traveled by the solvent.
Divide the distance traveled by the solvent by the distance traveled by the component.
Answers 1 and 2 only
Answers 1,2 and 3 only
Answers 1,2 and 4 only
Answers 1 through 4 are all required.
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14. Mass spectrometers Are readily available, even in high school labs.
Are used for every material identification that is attempted by a crime lab.
Provide identification based on the mass and charge of a sample
None of the above
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15. What are the three ways that someone can be poisoned?
Accidental, Intentional, Deliberate
Also (Routes of entry: inhalation, absorption, ingestion, injection)
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16. Restricted substances because of their effect on people are called __________ substances.
Prohibited
Controlled
Schedule
Destructive
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17. How many schedules are all drugs classified into?1 3 5 7
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18. Hallucinogens are drugs that…
Reduce pain
Make you see things that aren’t really there
Increase energy and alertness “uppers”
Relieve anxiety and make the user sleepy
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19. Depressants are drugs that…
Reduce pain
Make you see things that aren’t really there
Increase energy and alertness “uppers”
Relieve anxiety and make the user sleepy
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20. Narcotics are drugs that…
Reduce pain
Make you see things that aren’t really there
Increase energy and alertness “uppers”
Relieve anxiety and make the user sleepy
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21. Stimulants are drugs that…
Reduce pain
Make you see things that aren’t really there
Increase energy and alertness “uppers”
Relieve anxiety and make the user sleepy
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22. The most controlled and illegal substances are found in Schedule…1 2 3 4 5
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23. Cannabis is found in Schedule…1 2 3 4 5
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24. Alcohol is considered a…
Narcotic
Hallucinogen
Depressant
Steroid
Stimulant
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25. What was the outcome of the Lime Street fire in Jacksonville, Florida.
It is very easy to use v patterns and alligatoring to conclude an arson happened.
That arson and accidental fires all produce the same evidence making it hard to determine the cause
There is no such thing as fire; fire is a myth.
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26. Accelerants are… A controlled substance
A substance used to clean up after evidence has been packaged
A substance that accelerates the chemical break down of evidence
A substance that can help start and accelerate a fire
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27. When a room becomes fully engulfed in flame and has inferno temperatures (800 degrees Fahrenheit) this is called:
Flashdance
Flashover
Flashpoint
Flashfire
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28. Dopamine and Serotonin are two important ______________in the Brain
Accelerants
Neurotransmitters
Synapses
Cells
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29. What is it that makes certain substances so addictive?

30. The toxicity of a substance depends on
the dose, the duration of exposure, the nature of exposure, interactions with other substances, and the byproducts formed when metabolized.