chapter 6 test

Question 1

plastic print

Answer 1

indentations left in soft material

Question 2

latent print

Answer 2

hidden prints caused by transfer of oils and sweat

- made visible by dusting with powder or developing chemicals

Question 3

iodine

Answer 3

Iodine crystals: fumes react with oils and fats to produce a temporary yellow-brown color

Question 4

powders

Answer 4

Powders: adhere to both water and fatty deposits. Choose a color to contrast with the background

Question 5

silver

Answer 5

Silver: reacts with chloride to form silver chloride, a material that turns gray when exposed to light

Question 6

cyancrylate

Answer 6

“superglue” fumes react with water and other fingerprints constituents to form a hard, whitish deposit

Question 7

minutiea

Answer 7

based ridge structure and ridge patterns

Question 8

loop

Answer 8

a loop must have more than one ridges that enter from one side of the print re-curve

Question 9

whorl

Answer 9

one or more cores, at least two deltas

Question 10

arches

Answer 10

ridges enter one side and leave the other, no deltas

Question 11

state the three principals

Answer 11

1. finger is an individual characteristic
2. fingerprints will never change
3. fingerprints have a general ridge pattern that permit them to be systematically classified

Question 12

core

Answer 12

core is center fingerprint

Question 13

Radial

Answer 13

the loop flows toward the thumb - radius bone

Question 14

Ulnar:

Answer 14

Ulnar: line flows in the direction of the little finger - ulnar bone