Substances
Fingerprints
Splatters
Fibers
Miscellaneous
100
How can you tell the difference between salt and sugar based on how the look?
Salt crystals are a uniform cube. Sugar crystals are an irregular shape.
100
How many deltas does an arch have?
0
100
Identify the speed of the spatter
slow
100
What are the types of fibers?
Animal, Vegetable, and Synthetic fibers
100
What is the rf formula
Rf = D1 / D2
200
What shape does an individual yeast resemble and what color?
It is light tan and looks like tiny pellets
200
What are the three types of fingerprint visibility?
Latent, Visible, Plastic
200
Identify the speed
high
200
Which type of fiber turns black when melted?
Vegetable fiber
200
d1 = 8, d2 = 24 what is the rf
1/3
300
The water is lumpy when mixed with this solid
Flour
300
What are the types of fingerprint ridge patterns?
Tented Arch, Plain Arch, Whorl, and Loop
300
What is the indicater of a high velocity spatter
The droplets are small and scattered.
300
Give two examples of vegetable fibers.
cotton, linen
300
What does DNA stand for
Deoxyribonucleic acid
400
The water is smooth when mixed with this solid
cornstarch
400
What determines your fingerprint ridge patterns
dermal papillae
400
Identify the speed
high velocity
400
Give three examples of synthetic fibers
spandex, nylon, polyester
400
Will the larger or smaller DNA pieces travel faster?
smaller
500
How can you tell that water and hydrogen peroxide are different?
Water has no reaction with Iodine. Hydrogen peroxide fizzes.
500
What does Ninhydrin react with in fingerprint identification?
Amino Acids/proteins
500
How do you identify a transfer?
It is usually resembles an object that is smeared.
500
What type of fiber is rayon?
vegetable fiber
500
What liquid has the most pungent smell?
Ammonia