What is the state of matter of glass at room temperature?

It is an amorphous solid.

The main compounds in glass are __________.

Silicon Oxides & Metal Oxides

What is the name of the glass that is made by passing the molten glass through rollers?

Ordinary or rolled glass

Window glass is (more/less) dense than water.

More dense

The two most important physical properties of glass used for identification are:

Density and refractive index

True or False Density is not homogeneous over sheet of glass

True

True or False, when glass shatters it is easy to reconstruct the original shape.

false

This type of glass involves a treatment where the glass is heated to 620 o C and then cooled rapidly. What is the name of this glass?

Tempered or Safety Glass

Name the type of glass that is used for flat glass, container glass, and electric light bulbs.

Soda Lime Silicate

The fracture pattern of glass usually has __________ lines.

Conchoidal

This type of conchoidal line appears first when glass is fractured.

Radial

For a ______________ fracture, the perpendicular end, faces the surface on which the force originated.

concentric

In a forensic laboratory, a technique frequently used to determine the density of glass involves the use of ___________

Density – Gradient tubes

Stress marks on the edge of a radial crack near the point of impact are ___________ to the side on which the force was applied.

parallel

True or False A crater-shaped hole is narrower on the side where the projectile entered the glass.

True

True or False – It is easy to determine from the size and shape of a hole in glass, whether to was made by a bullet or some other projectile.

False

A piece of window glass is submerged in vegetable oil. The outline of the glass is visible. When light is shown behind the glass, a bright halo appears near the border of the glass. This bright halo is called a _________.

Becke line

Laminate or laminated

Name at least one out of three common problems associated with glass analysis (glass comparisons)

Find and measure properties Associate one glass fragment with another Minimize or eliminate other sources

The bending of light as it travels through one medium into another is known as ________.

Refraction

As light goes from the air into a liquid sample, the bending of light is due to a(n) ___________ in velocity of the light.

decrease

At 25 o C the refractive index of water is This means that light travels 1.333x __________ in a vacuum than in water.

Faster