Glass Analysis K

Glass density can be determined by:

• dividing the mass in grams of the glass by the water it displaces in mL 
• measuring the thickness of the glass with a cm ruler
• hitting the glass with a hammer to see the fracture patterns
• all of these

The bright halo that appears near the border of a glass particle that is immersed in a liquid of a different refractive index is called the:

• border line
• refractive line
• Becke line
• immersion line

A crack in glass that moves outward from the point of impact like spokes on a wheel is called a:

• compound fracture
• concentric fracture
• spoke fracture
• radial fracture

In the lab, a Pyrex/borosilicate piece of glass was dipped in vegetable oil and disappeared from view. What does this tell us?

• the piece disintegrated in the oil
• the oil and the glass had the same refractive index
• the oil and the glass chemically reacted
• the oil and the glass have different refractive indices

Tags

NGSS.MS-PS4-2

Because glass is a solid with random arrangement of motionless atoms, it is called:

• plasma
• obtuse
• amorphous
• frozen

Which type of fracture is shown by letter B?

• radial
• concentric
• birefrigent
• none of these

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

• is wider on the entrance side
• is smaller on the entrance side
• Forms randomly
• Both B & C

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-3

Which of these is part of using the 3R rule to determine the direction of impact?

• radial crack
• right angle
• reverse side of force
• all of these

Tags

NGSS.MS-PS2-1

In reference to the diagram, what is the correct sequence of impact

• A first
• B first
• A and B simultaneously
• Sequence impossible to determine

What is the only way to make a glass fragment individual and not class evidence?

• physical fit to the broken pieces
• density match
• same soil type
• Becke line match