Glass

What can alter the uses of glass significantly?

• Its age

• Its elemental formula

• Its color

• Its size

What is the role of boron oxide in glass?

• Reduces transparency

• Increases heat resistance

• Decreases chemical durability

• Increases weight

Tags

NGSS.HS-PS2-6

Which type of glass can withstand high temperatures and is good for cooking and science equipment?

• Laminated glass

• Lead glass

• Aluminosilicate & borosilicate

• Soda lime glass

Tags

NGSS.MS-PS1-4

What is a characteristic of tempered glass?

• Withstands high temperatures

• Breaks into tiny cubed pieces

• Used in fine crystal

• Has a plastic layer

The fracture pattern of glass usually has

• Radial and concentric lines

• Concentric lines

• Radial lines

• Directional lines

In reference to the diagram, line 1 is known as __________, and line 2 is known as ___________.

• Radial and concentric

• Radial and directional

• Concentric and directional

• Concentric and Radial

Which type of glass fractured this way? 

• tempered (auto)

• window

• crystal

• Pyrex

Bending of light waves as they change velocity is called:

• reflection

• mirroring

• refraction

• transversing

Tags

NGSS.MS-PS4-2

What is the main ingredient in ordinary glass?

• (a) soda

• (b) lime

• (c) metal oxides

• (d) sand

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