chapter 10 forensics

Which color of the visible spectrum has the highest frequency and the shortest wavelength?

A: Green 

B: Red

C: Violet

D: Yellow

C

Stress marks on the edge of a radial crack near the point of impact are:

A: Parallel to the side opposite the side on which the force was applied.

B: Perpendicular to the side of the glass facing outdoors.

C: Parallel to the side on which the force was applied.

D: Perpendicular to the side on which the force was applied.

C

The smallest particle of an element that can exist and still retain its identity as that element is the:

A: Compound

B: Element

C: Atom

D: Photon

C

Which is a true statement about the fracturing of glass?

A: Concentric fractures form first, on the same side as the destructive force.

B: Radial cracks form afterward, starting on the same side as the destructive force.

C: Concentric fractures form first, starting on the side opposite the destructive force.

D: Radial cracks appear first, starting on the side opposite the destructive force.

D

________ is the visual effect caused by an object's absorption of certain portions of the visible light spectrum and transmission or reflection of others.

A: Density

B: Dispersion

C: Color

D: Refractive index

C

A hot-stage microscope or the GRIM 3 is used to determine the ________ of glass fragments.

A: Temperature

B: Relative density

C: Metallic oxide content

D: Refractive index

D

Which is NOT an intensive property of matter?

A: Boiling Temp

B: Density

C: Refractive index

D: Weight

D

In reference to the diagram above, what is the correct sequence of impacts?

A: A first

B: The sequence is impossible to determine

C: A and B simultaneously

D: B first

A

The fracture pattern of glass usually has:

A: Directional lines

B: Radial and concentric lines

C: Concentric lines

B: Radial lines

B

When tempered glass breaks, it does not shatter.

A: True

B: false 

A

The only way to individualize glass fragments at a crime scene to a single source is to assemble the fragments andphysically fit them together like a jigsaw puzzle.

A: true 

B: false 

A

Most glass fragments can be physically reassembled or fitted together by the criminalist.

A: true 

B: false 

B

Glass fragments removed from a single sheet of plate glass have a uniform density or refractive index value.

A: true

B: false 

B

Tempered glass is used in:

A: Both B and C

B: The side and rear windows of autos manufactured in the United States

C: Windshields in autos manufactured in the United States

D: Crystal stemware

B

Flotation is a method used by scientists to determine the ________ of a particle of glass.

A: Refractive index

B: Mass

C: Density

D: Weight

C

The photons of which source have the LEAST amount of energy?

A: Radio waves

B: Gamma rays

C: Infrared rays

D: Microwaves

A

A(n) ________ property describes the behavior of a substance without reference to any other substance while a(n)________ property describes the behavior of a substance when it reacts or combines with another substance

A: Optical; birefringent

B: Physical; biological

C: Chemical; biological

D: Physical; chemical

D

When a bullet penetrates a panel of glass, it leaves a crater-shaped hole that:

A: Is wider on the exit side

B: Forms randomly and hence the direction of impact cannot be determined by its appearance

C: Either A or C

D: Is wider on the entrance side

A

Pyrex glass:

A: Is laminated

B: is put through an annealing process

C: Has been tempered

D: Is made with the addition of boron oxide

D

What is the main ingredient in ordinary glass?

A: Soda (NaCO)

B: Lime (CaO)

C: Metal oxides

D: Sand

D

The two most important physical properties of glass for forensic comparisons are:

A: Refractive index and weight

B: Weight and density

C: Color and density

D: Refractive index and density

D

A piece of glass is immersed in a liquid. It proceeds to float on the liquid's surface. This shows that the density of theglass is ________ the density of the liquid.

A: Equal to

B: More than 

C: Less than

D: Not comparable to 

C

A fracture always terminates at an existing line of fracture.

A: true

B: false 

A

The 3R rules states that Radial cracks form a Right angle on the Reverse side of the force.

A: true 

B: false 

A

Eight inches is approximately ________ centimeters.

A: 10

B: 8

C: 20 

D: 17 

C