Download Forensic Chemistry Worksheet

Forensic Chemistry Worksheet
Chapter 4
*Answer the fill in the blank questions on page 116-117
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*Answer the following questions:
1. The basic metric unit of volume is the:
a. ounce
b. meter
c. liter
d. cubic centimeter
2. One inch is equivalent to how many centimeters?
a. 100
b. 10
c. 254
d. 2.54
3. Water boils at:
a. 0 Celsius
b. 25 Celsius
c. 50 Celsius
d. 100 Celsius
4. Which of the following is not a physical property of a substance?
a. boiling point
b. color
c. melting point
d. color change in the presence of another chemical substance
5. Density is defined as:
a. volume per unit weight.
b. weight per unit volume
c. volume per unit volume
d. weight per unit weight
6. A piece of glass is immersed in a liquid. It proceeds to float on the liquid’s surface.
This shows that the density of the glass is ______ the density of the liquid.
a. more than
b. less than
c. equal to
d. none of the above
7. The two most important physical properties of glass for forensic comparisons are:
a. color and density
b. weight and density
c. refractive index and density
d. refractive index and weight
8. The larger opening of a crater-shaped hole in glass made by the penetration of a
projectile indicates:
a. the exit side of the glass
b. the entrance side of the glass
c. that a bullet made the opening
d. that the projectile was traveling at a low velocity
9. If glass cannot be physically pieced together, then the control and question glass are
best compared as to their:
a. color and density
b. weight and density
c. refractive index and density
d. refractive index and weight
10. The fracture pattern of glass usually has:
a. radial lines
b. concentric lines
c. radial and concentric lines
d. directional lines
11. Stress marks on the edge of a radial crack near the point of impact are:
a. perpendicular to the side on which the force was applied
b. parallel to the side on which the force was applied
c. parallel to the side opposite the side on which the force was applied
d. none of the above
12. A technique frequently used to compare soils is:
a. the immersion method
b. density-gradient tubes
c. flotation
d. becke line
13. A store-front window is broken and a robbery committed. A suspect is later found
running from the scene. Examination of his shoes reveals glass particles embedded in a
heel. Describe the proper collection and preservation of glass evidence for lab
examination.
14. A suspect has been found miles from the scene of a murder. Soil is found adhering to
the suspect’s shoe. Describe the proper collection and preservation of soil evidence that
will permit a thorough comparison of the soil on the shoe to soil at the crime site.