Page | 1
UF PHA6936 FINAL EXAM PREP
BRAND NEW OFFICIAL QUESTIONS
WITH ANSWERS.
What are the types of fracture patterns of glass? - correct answer
-Radial and concentric
If the refractive index of glass matches that of a liquid, what will
you see when ou put the glass sample inside the liquid? - correct
answer -The glass will disappear
What are natural fibers? - correct answer -Fibers made from
animals or plants
What are some examples of natural fibers? - correct answer -
Cotton, wool, silk, hemp
What are synthetic fibers and what would be an example? -
correct answer -Manmade or altered fibers
Acetate, rayon, polyester
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What type of fibers contain proteins? - correct answer -Animal
fibers
What three fibers dissolve in formic acid? - correct answer -Nylon,
silk, acetate
When performing the sulfur test, what color precipitate should
show a positive outcome? - correct answer -Black or dark grey
What is the only fabric to dissolve in acetone? - correct answer -
Acetate
What are examples of mineral fibers? - correct answer -Asbestos,
rock wool, fiberglass
What are examples of cellulose fibers? - correct answer -Cotton,
rayon, cullulose acetate
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What is the difference between hydrophilic and hydrophobic? -
correct answer -Hydrophilic-water absorbing
Hydrophobic-water repelling
How should you collect fiber evidence? - correct answer -Make
tape lifts, bag evidence individually, removed fibers should be
folded into a sheet of paper and stored in a paper bag
How often does hair grow? - correct answer -1 cm/month
What are the 3 layers of hair? - correct answer -Cuticle, cortex,
medulla
Which layer has pigment granules? - correct answer -Cortex
Which layer is resistant to chemical decomposition? - correct
answer -Cuticle
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How can the medulla be classified? - correct answer -Interrupted,
fragmented, continous, stacked, absent
What type of medullas do animals usually have? - correct answer
-Stacked, continuous or interrupted
What type of medullas do humans usually have? - correct answer
-Continuous, fragmented or absent
What are th 3 stages of growth? - correct answer -Anagen,
catagen, telogen
How long does each stage of growth last? - correct answer -
Anagen- up to 5 years
Catagen- 2-3 weeks
Telogen- 2-6 months
Can scientists determine body area that hair came from
comparison? - correct answer -Yes
UF PHA6936 FINAL EXAM PREP
BRAND NEW OFFICIAL QUESTIONS
WITH ANSWERS.
What are the types of fracture patterns of glass? - correct answer
-Radial and concentric
If the refractive index of glass matches that of a liquid, what will
you see when ou put the glass sample inside the liquid? - correct
answer -The glass will disappear
What are natural fibers? - correct answer -Fibers made from
animals or plants
What are some examples of natural fibers? - correct answer -
Cotton, wool, silk, hemp
What are synthetic fibers and what would be an example? -
correct answer -Manmade or altered fibers
Acetate, rayon, polyester
, Page | 2
What type of fibers contain proteins? - correct answer -Animal
fibers
What three fibers dissolve in formic acid? - correct answer -Nylon,
silk, acetate
When performing the sulfur test, what color precipitate should
show a positive outcome? - correct answer -Black or dark grey
What is the only fabric to dissolve in acetone? - correct answer -
Acetate
What are examples of mineral fibers? - correct answer -Asbestos,
rock wool, fiberglass
What are examples of cellulose fibers? - correct answer -Cotton,
rayon, cullulose acetate
, Page | 3
What is the difference between hydrophilic and hydrophobic? -
correct answer -Hydrophilic-water absorbing
Hydrophobic-water repelling
How should you collect fiber evidence? - correct answer -Make
tape lifts, bag evidence individually, removed fibers should be
folded into a sheet of paper and stored in a paper bag
How often does hair grow? - correct answer -1 cm/month
What are the 3 layers of hair? - correct answer -Cuticle, cortex,
medulla
Which layer has pigment granules? - correct answer -Cortex
Which layer is resistant to chemical decomposition? - correct
answer -Cuticle
, Page | 4
How can the medulla be classified? - correct answer -Interrupted,
fragmented, continous, stacked, absent
What type of medullas do animals usually have? - correct answer
-Stacked, continuous or interrupted
What type of medullas do humans usually have? - correct answer
-Continuous, fragmented or absent
What are th 3 stages of growth? - correct answer -Anagen,
catagen, telogen
How long does each stage of growth last? - correct answer -
Anagen- up to 5 years
Catagen- 2-3 weeks
Telogen- 2-6 months
Can scientists determine body area that hair came from
comparison? - correct answer -Yes
