Forensic Glass Analysis

What is the significance of density in identifying glass fragments in a crime scene?

• Different types of glass have different densities, allowing forensic scientists to determine the type of glass based on its density.

• Density is irrelevant in identifying glass fragments in a crime scene.

• Density is used to determine the shape of the glass fragments.

• Density helps in identifying the age of the glass fragments.

Explain the concept of radial and concentric fractures in glass and their importance in forensic investigations.

• Radial fractures are cracks that form circles around the point of impact, while concentric fractures are cracks that radiate outward from the point of impact.

• Radial fractures are cracks that radiate outward from the point of impact, while concentric fractures are cracks that form circles around the point of impact.

• Radial fractures are cracks that form straight lines from the point of impact, while concentric fractures are cracks that form irregular shapes around the point of impact.

• Radial fractures are cracks that form irregular shapes around the point of impact, while concentric fractures are cracks that radiate outward from the point of impact.

Discuss the role of elemental analysis in identifying the source of glass evidence.

• Elemental analysis is not useful in identifying the source of glass evidence.

• Elemental analysis can only identify the color of the glass, not the source.

• Elemental analysis is only used for identifying the source of metal evidence, not glass.

• Elemental analysis helps identify the source of glass evidence by comparing the elemental composition of the glass sample with known reference samples.

Explain the process of glass fracture matching and its application in forensic science.

• Glass fracture matching is the process of comparing broken glass fragments to determine their color. It is used in forensic science to identify the type of glass used in a crime.

• Glass fracture matching is the process of comparing broken glass fragments to determine their age. It is used in forensic science to estimate the time of a crime.

• Glass fracture matching is the process of comparing broken glass fragments to determine if they originate from the same source. It is used in forensic science to link glass fragments found at a crime scene to a specific source.

• Glass fracture matching is the process of comparing broken glass fragments to determine their weight. It is used in forensic science to identify the size of a crime.

How can the presence of laminated glass be detected in a forensic analysis?

• By checking for a single layer of glass without any plastic in between.

• By analyzing the glass for a metallic layer on the surface.

• By observing the glass for a frosted appearance indicating the presence of laminated layers.

• By examining the glass for a sandwich-like structure with a layer of plastic between two layers of glass.

Tags

NGSS.HS-PS1-3

Discuss the limitations and challenges associated with using glass as evidence in forensic science.

• The transparency of glass makes it difficult to analyze

• Glass evidence is often fragile and can easily break during transportation

• The composition of glass can vary greatly, making it challenging to compare samples

• The limitations and challenges associated with using glass as evidence in forensic science include the lack of individualization, the possibility of contamination, and the difficulty in determining the source of the glass.

How can the presence of tempered glass be determined in a forensic examination?

• By examining the color of the glass

• By examining the fracture pattern

• By measuring the thickness of the glass

• By analyzing the chemical composition

What are the physical properties of glass that can be used for forensic analysis?

• Taste, smell, and sound

• Refractive index, density, color, thickness, and fracture patterns.

• Weight, height, and texture

• Age, gender, and nationality

Which property of glass evidence is crucial when comparing glass fragments from different sources?

• Color and opacity

• Thickness and weight

• Fracture patterns and density

• Refractive index and elemental composition

What is the primary method used to determine the refractive index of glass in forensic analysis?

• A) Immersion method

• B) Density gradient method

• C) Spectroscopy

• D) Chromatography

Tags

NGSS.HS-PS4-3