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Forensic Glass Analysis

Total questions: 28

Worksheet time: 19mins

Name
Class
Date
1.

What should students define as "a measure of how much an object slows light"?

a)

Refractive index

b)

Glass density

c)

Glass color

d)

Glass weight

2.

Which of the following is an example of a flux?

a)

Boron trioxide (B₂O₃)

b)

Phosphorus pentoxide (P₂O₅)

c)

Sodium carbonate (Na₂CO₃)

d)

Silicon dioxide (SiO₂)

3.

What is the primary function of stabilizers in glass?

a)

To add color

b)

To make the glass transparent

c)

To strengthen the glass and make it water-resistant

d)

To change the melting point

4.

Which of the following is NOT a former?

a)

Silicon dioxide (SiO₂)

b)

Boron trioxide (B₂O₃)

c)

Phosphorus pentoxide (P₂O₅)

d)

Potassium carbonate (K₂CO₃)

5.

What is the primary raw material used in the composition of glass?

a)

Soda (Na₂O)

b)

Silica (SiO₂)

c)

Lime (CaO)

d)

Alumina (Al₂O₃)

6.

What is the role of oxides in the composition of glass?

a)

They provide color to the glass.

b)

They determine the transparency of the glass.

c)

They are the raw materials used to make glass.

d)

They are used to polish the glass surface.

7.

What is the significance of the percentage composition of oxides in glass?

a)

It affects the color of the glass.

b)

It determines the strength of the glass.

c)

It defines the properties and quality of the glass.

d)

It influences the weight of the glass.

8.

What is the primary component of obsidian?

a)

Sand

b)

Lava

c)

Ice

d)

Metal

9.

Which type of glass is described as the most basic, common, and inexpensive?

a)

Borosilicate glass

b)

Soda-lime glass

c)

Lead glass

d)

Quartz glass

10.

What is another common name for leaded glass?

a)

Quartz

b)

Crystal

c)

Plexiglass

d)

Fiberglass

11.

What process is used to strengthen tempered glass?

a)

Slow cooling.

b)

Rapid heating and cooling.

c)

Chemical treatment.

d)

Mechanical pressing.

12.

What is a common application of tempered glass?

a)

In kitchen countertops.

b)

In the side and rear windows of automobiles.

c)

In eyeglasses.

d)

In solar panels.

13.

What occurs when light passes through media with different refractive indexes?

a)

Reflection

b)

Diffusion

c)

Refraction

d)

Absorption

14.
When a bullet penetrates a panel of glass, it leaves a crater shaped hole that
a)
is wider on the entrance side
b)
is smaller on the entrance side
c)
Forms randomly
d)
Both B & C
15.
In reference to the diagram, line 1 is known as __________, and line 2 is known as ___________.
a)
Radial and concentric
b)
Radial and directional
c)
Concentric and directional
d)
Concentric and Radial
16.
Which glass break was made first?
a)
A
b)
B
17.
What will NOT be visible if a glass and a liquid has the same refractive index?
a)
Conchoidal Lines
b)
Becke Lines
c)
Fracture Lines
d)
Radial Lines
18.
What type of fracture forms on the same side as the impact?
a)
Radial
b)
Becke
c)
Concentric
d)
Conchodial
19.

Match the following

a)

Primary ingredient of glass

1.

sand

b)

Added to prevent glass from being soluble in water

2.

calcium oxide

c)

Added to reduce the melting point of sand

3.

sodium oxide

d)

used to strengthen glass and make it resistant to water

4.

calcium carbonate

20.
Because glass is a solid with random arrangement of motionless atoms, it is called:
a)
plasma
b)
obtuse
c)
amorphous
d)
frozen
21.

Which property makes tempered glass safer than regular glass when broken?

a)

It is transparent.

b)

It is colored.

c)

It shatters into small, blunt pieces.

d)

It is heavier than regular glass.

22.

What is the main purpose of adding sodium carbonate (Na₂CO₃) to glass during manufacturing?

a)

To increase the melting point

b)

To lower the melting point

c)

To add color

d)

To make the glass opaque

23.

Which type of fracture pattern radiates outward from the point of impact in glass?

a)

Amorphous

b)

Becke

c)

Radial

d)

Concentric

24.
What will NOT be visible if a glass and a liquid has the same refractive index?
a)
Conchoidal Lines
b)
Becke Lines
c)
Fracture Lines
d)
Radial Lines
25.
What type of fracture is this?
a)
Becke
b)
Conchodial
c)
Concentric
d)
Radial
26.
A fracture in glass always terminates at an existing line of fracture
a)
True
b)
False
c)
Maybe
27.

How do you measure the volume of an irregular shaped object?

a)

measure the length and width of the object

b)

measure the mass of the object

c)

use the volume displacement method

d)

measure the height of the object

28.

Which object has the greatest volume?

a)

the empty one

b)

the button

c)

the nail

d)

the battery

e)

the screw

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