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WorksheetsForensic Glass Analysis
Total questions: 11
Worksheet time: 7mins
Name
Class
Date
1.
The bright halo that appears near the border of a glass particle that is immersed in a liquid of a different refractive index is called the:
a)
border line
b)
refractive line
c)
Becke line
d)
immersion line
2.
A crack in glass that moves outward from the point of impact like spokes on a wheel is called a:
a)
compound fracture
b)
concentric fracture
c)
spoke fracture
d)
radial fracture
3.
Which type of fracture is shown by letter B?
a)
radial
b)
concentric
c)
birefrigent
d)
none of these
4.
Which of these applies to tempered glass?
a)
it is made by rapid heating and cooling
b)
it shatters into oval shaped pebbles
c)
it is used for cookware, tub enclosures, and coffee pots
d)
all of these describe tempered glass
5.
Which type of glass is used to make car windshields?
a)
tempered
b)
laminated
c)
acrylic
d)
standard
6.
In the lab, a Pyrex/borosilicate piece of glass was dipped in vegetable oil and disappeared from view. What does this tell us?
a)
the piece disintegrated in the oil
b)
the oil and the glass had the same refractive index
c)
the oil and the glass chemically reacted
d)
the oil and the glass have different refractive indices
7.
Because glass is a solid with random arrangement of motionless atoms, it is called:
a)
plasma
b)
obtuse
c)
amorphous
d)
frozen
8.
You can tell what side of a glass piece was struck by observing:
a)
the horizontal waves
b)
the right angle rule
c)
the becke lines
d)
the refractive index
9.
Glass evidence is:
a)
class
b)
individual
c)
direct
d)
both class and individual
10.
Glass density can be determined by:
a)
dividing the mass in grams of the glass by the water it displaces in mL
b)
measuring the thickness of the glass with a cm ruler
c)
hitting the glass with a hammer to see the fracture patterns
d)
all of these
11.
Which one came first, A or B?
a)
A
b)
B
c)
no way to tell
d)
occurred at same time
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