Glass Evidence

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

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

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

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

What is the 1st step for handling glass at a crime scene?

• Identify and photograph any glass samples before moving them. 
• Collect the largest fragments that can be reasonably collected
• Identify the outside and inside surface of any glass
• If multiple panes are involved, make a diagram

What is the 2nd step for handling glass at a crime scene?

• Note trace evidence such as skin, hair, blood, or fibers. 
• Collect the largest fragments that can be reasonably collected
• Identify the outside and inside surface of any glass
• If multiple panes are involved, make a diagram

What is the 3rd step for handling glass at a crime scene?

• Note trace evidence such as skin, hair, blood, or fibers. 
• Package all materials collected to maintain the chain of custody
• Identify the outside and inside surface of any glass
• If multiple panes are involved, make a diagram

What is the 4th step for handling glass at a crime scene?

• Note trace evidence such as skin, hair, blood, or fibers. 
• Package all materials collected to maintain the chain of custody
• Identify the outside and inside surface of any glass
• If multiple panes are involved, make a diagram