ForSci_BW_11/08_Glass in Forensic Science

What is glass commonly used as in forensic science?

• evidence

• crime scene

• suspect

• weapon

Why is glass considered a valuable form of trace evidence in forensic investigations?

• Glass can provide information about the source, type, and origin of the glass.

• Glass can help determine the temperature and weather conditions at the crime scene.

• Glass can reveal the age and manufacturing process of the glass.

• Glass can provide information about the color and texture of the glass.

What are the two main types of glass commonly encountered in forensic cases?

• mirror glass and safety glass

• tempered glass and laminated glass

• plastic glass and acrylic glass

• stained glass and frosted glass

How can the refractive index of glass be useful in forensic analysis?

• The refractive index of glass can be used to identify and compare glass fragments in forensic analysis.

• The refractive index of glass can be used to analyze the chemical composition of glass fragments in forensic analysis.

• The refractive index of glass can be used to identify fingerprints on glass surfaces in forensic analysis.

• The refractive index of glass can be used to determine the age of glass fragments in forensic analysis.

Tags

NGSS.HS-PS4-3

What are some common characteristics of glass that can be examined in forensic analysis?

• Transparency, hardness, weight, and chemical composition

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

• Opacity, flexibility, size, and melting point

• Luster, conductivity, shape, and boiling point

Tags

NGSS.MS-PS4-2

What is the significance of the presence of tempered glass in a crime scene?

• Tempered glass can indicate accidental breakage.

• Tempered glass can provide evidence of forced entry or the use of a weapon.

• Tempered glass has no significance in a crime scene.

• Tempered glass can be easily manipulated and does not provide reliable evidence.

How can the fracture patterns of glass be helpful in forensic investigations?

• The fracture patterns of glass can provide information about the direction and force of impact, helping to determine the cause of the fracture and potentially identify the object or weapon used.

• Forensic investigations do not rely on fracture patterns of glass for any analysis.

• Fracture patterns can only provide information about the type of glass, not the cause of the fracture.

• The fracture patterns of glass have no relevance in forensic investigations.

What techniques are used to collect and preserve glass evidence at a crime scene?

• Using bare hands, placing in a plastic bag, not documenting, and leaving the container open.

• Using a vacuum cleaner, placing in a glass jar, documenting with a crayon, and sealing the container with tape.

• Wearing gloves, using a broom, placing in a paper bag, documenting with a pencil, and leaving the container unsealed.

• Wearing gloves, using forceps or tweezers, placing in a labeled container, documenting, and sealing the container.

What are some challenges faced in the analysis of glass evidence in forensic science?

• Difficulty in identifying specific glass types

• Presence of multiple layers, small fragments, and need for specialized equipment.

• Lack of funding for specialized equipment

• Limited availability of trained forensic glass analysts

How can the density of glass be determined in forensic examinations?

• Buoyancy test

• Magnetic resonance imaging

• Chemical analysis

• Archimedes' principle