Deck 22: Glass and Soil

Question 1

Glass is an amorphous solid.

Answer 1

True

Question 2

Glass might be considered a super cooled liquid.

Answer 2

True

Question 3

The basic ingredient in glass is sodium chloride.

Answer 3

False

Question 4

Tempered glass is heated to 1500⁰C to achieve its consistency.

Question 5

The glass exposed to the highest temperatures is float glass.

Question 6

Glass fitted together like a jigsaw puzzle is a fracture match.

Question 7

The class characteristics of glass are very limited due to its inert nature.

Question 8

Soil is very easily identified by individual characteristics.

Question 9

Soil is generally homogenous is all areas.

Question 10

HPLC is used to separate and display some f the common components of soils.

Question 11

Why is glass often considered class evidence?

A) It has so many categories
B) It can only be matched to a type of glass
C) There are no tests to identify glass
D) It is too small to correctly identify

Question 12

Glass can be individualized evidence when it is

A) found on a suspect who is linked to the scene
B) found to have the same refractive index as an exemplar
C) matched like a puzzle piece to a broken window
D) matched to an exemplar by density analysis

Question 13

The basic compound found in all types of glass is

A) silicon oxide
B) carbon dioxide
C) sulfur dioxide
D) silicon dioxide

Question 14

Which type of glass is similar in chemical composition to window glass?

A) borosilicate
B) tempered
C) lead crystal
D) pyrex

Question 15

Lead crystal has what additive to make it have its characteristic properties?

A) silicon dioxide
B) borax
C) lead oxide
D) soda lime

Question 16

Pyrex has what additive to make it have its characteristic properties?

A) silicon dioxide
B) boron
C) lead oxide
D) soda lime

Question 17

Tempered glass gets its safety fracture features by

A) special cooling processes during manufacture
B) special heating processes during manufacture
C) special additives to the mixture
D) special stretching processes during manufacture

Question 18

Why is glass considered important forensic evidence because

A) a suspect can be unaware that they have it on them
B) it does not decay
C) it is commonly found at crime scenes
D) all of these are reasons

Question 19

Where is tempered glass found in everyday life?

A) all eyeglasses
B) house windows
C) automobile windows
D) drinking glasses

Question 20

The two types of fracture lines that can be produced when glass is hit by a foreign object are:

A) longitudinal, circular
B) radial, concentric
C) wallner, concoidal
D) radial, concoidal

Question 21

Stress marks that form on the radial edge of a piece of broken glass are called _______.

A) conchoidal lines
B) concentric
C) conical
D) strated

Question 22

The "3R" rule for determining the direction of force on a broken piece of glass states that when examining a ______________fracture, there is a __________angle formed on the _______________side of the force.

A) right angle, reverse, radial
B) radial, reverse, right angle
C) radial, right, reverse
D) radial, radical, reverse

Question 23

Which of the following is not a common physical property of glass.

A) color
B) refractive index
C) thickness
D) all are common properties

Question 24

The bending of a light ray in a medium is called

A) reflection
B) refraction
C) radiation
D) none of these

Question 25

Light can refract when it

A) hits a solid surface
B) goes from deep to shallow water
C) travels from one medium to another
D) light never refracts, only reflects

Question 26

The line that appears to be formed at the boundary between two different refractive indices and disappears if two substances has the same refractive index is called the ____________ line.

A) Bork line
B) Becke line
C) Bruning line
D) None of the above

Question 27

The microscope is used to examine glass pieces is called a

A) hot-stage
B) stereo
C) compound
D) comparison