Which of the following is not a common ingredient of glass?

• Silica
• Carbon Dioxide
• Calcium Oxide
• Sodium Oxide

What type of solid is seen in the picture?

• Amorphous solid
• Regular solid
• Liquid
• Gas

Refraction is the change in the direction of light as it changes ___ when moving from one medium into another.

• Shape
• Distance
• Speed
• Structure

Bits of glass can fly backwards.  This is called:

• Backtrace
• Backspatter
• Backflash
• Backscatter

Which of the following is the correct formula for calculating the density of glass?

• D= m/V
• D= V/m
• D= m x V
• D= 2mV

The earliest human-made glass objects date back to about ___ Egypt.

• 1000 BC
• 1500 BC
• 2000 BC
• 2500 BC

Which glass break was made first?

• A
• B

What type of fracture is this?

• Becke
• Conchodial
• Concentric
• Radial

What are two ways for determining the refractive index of glass?

• Laser; Submersion
• Laser; Fracture
• Submersion; Fracture
• Fracture; Conchodial

What will NOT be visible if a glass and a liquid has the same refractive index?

• Conchoidal Lines
• Becke Lines
• Fracture Lines
• Radial Lines