Glass: More than Meets the Eye Directions: Read the article “Glass: More Than Meets the Eye” - starts on page 4. Type “A” or “D” indicating whether or not the text agrees or disagrees with each statement found in the table below. In the space under each statement, cite information from the article that supports or refutes this agreement or disagreement.

Text
(A or D)
Statement
A
1. Ultraviolet light is often used to examine physical properties of glass.

A
2. The flotation method for determining the density of glass is more accurate than finding its mass and volume separately.

D
3. Some glass is less dense than water.

4. There are only about 100 different types of glass, and the FBI has a database of their refractive index values.

5. Different glass samples having the same density and refractive index have the same chemical composition.

6. Most glass is made of silicon dioxide.

7. A radial fracture from a bullet hole will always terminate in cracks from previous fractures.

8. Exit holes from bullets are always larger than entrance holes.

9. There is no way to tell if a light bulb was on or off when the bulb broke.

As you read, describe each property of glass and tell how it can be used by forensic scientists to gather information. Write in your own words, using bullet points, if desired.

Property
Description
Usefulness in Forensics
Density

Refractive Index
(Becke line)