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Glass - More than Meets the Eye

Last updated 10 months ago
22 questions
Review the following statements and consider if the statement made is TRUE or FALSE prior to reading the article.
Read the following statements and answer with “T” if you think the statement is true and write an “F” if you think it is false.
1

Ultraviolet light is often used to examine physical properties of glass.

1

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

1

Some glass is less dense than water.

1

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

1

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

1

Most glass is made of silicon dioxide.

1

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

1

Exit holes from bullets are always larger than entrance holes.

1

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.
1

Thickness

1

Density

1

Refractive Index

1

Chemical Composition

1

Elasticity

1

Filament clues

1

Name the two most often used methods of glass analysis.

1

What two substances are added to silica as glass is made?

1

What does the term “amorphous” mean?

1

What does the index of refraction measure?

1

What is the important ingredient in bullet-proof glass?

1

What are the two types of glass fractures?

1

Use the picture below to label the following:
1st impact and 2nd impact, radial lines and concentric lines 📷