What type of evidence is glass considered?

This is the method that if glass fractures align, the fragments are from the same piece. It also can produce individualized glass evidence.

Applied to a solid, it refers to having atoms that are arranged randomly instead of in a distinctive pattern

What is the primary ingredient in glass?

This type of glass is most common, inexpensive, and used to make bottles, drinking glasses, & windows

This type of glass contains lead which makes it less brittle & sparkly. It is commonly used for fine glassware & decorative art.

This type of glass contains compounds that allow it to withstand high temperatures. It is commonly used in kitchen & lab supplies

This type of glass has two or more panes of glass bonded by a plastic layer. It resists breakage & penetration, and is commonly used for car windshields, entrance doors, & display cases.

This type of glass is made using extreme temperatures & chemicals so that it breaks into small chunks or "pebbles." It is commonly used for glass tables, shower doors, or side/rear car windows.

Based on it's properties & uses, what type of glass is this?

Based on it's properties & uses, what type of glass is this?

Based on it's properties & uses, what type of glass is this?

Based on it's properties & uses, what type of glass is this?

Based on it's properties & uses, what type of glass is this?

This property determines the width of the glass. It is directly related to function. For example, glass used to make a door must be at least 3/16 of an inch wide to do its job successfully.

This property is the ratio of the mass of an object to its volume. It can be determined using the water displacement method.

This property is a measure of how light bends as it passes from one substance to another

Which of the following is NOT a fracture pattern?

This fracture pattern extends outward from the point of impact. Also known as the "primary fracture"

This fracture pattern is a circular pattern of cracks that forms around a point of impact. Also known as a "secondary fracture"

This fracture pattern produces wavy fracture lines, and is especially important in arson investigations.

This fracture pattern produces unique markings when rubbed against glass

This test is used to determine the refractive index of small glass fragments. It is performed by placing a glass fragment into a series of different liquids of known refractive indexes. If the glass and the liquid have the same refractive index, the fragement will "disappear" when placed into the liquid.

According to the diagram above, what is the refractive index of the glass fragment?

This is a halo ring that appears around the edge of a glass fragment when the refractive index of the glass is different than the refractive index of a liquid

This type of technology examines the filaments in motor vehicle headlights. If a headlight was on at the time of a collision, the heat of the filament causes the glass to fuse with the filament. This information is used to help determine the cause of a collision.

This type of technology examines the emission of characteristic “secondary” (or fluorescent) X-rays from glass that has been irradiated. It is used to analyze the elements in a glass sample.

This type of technology analyzes the composition of glass and can distinguish between glass fragments that cannot be distinguished by refractive index or density.

The equation above is known as ___________________, and is used to determine the refractive index of a fragment of glass.

What is the density of pyrex if the mass is 53.52 grams and the volume is 24 cm^3

Using Snell's Law, calculate the index of refraction for material Z if the angle in water (n=1.33) is 42° and the refracted angle is 28°