Glass Forensics

What is the 2nd step for handling glass at a crime scene?

• Note trace evidence such as skin, hair, blood, or fibers. 

• 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

Bits of glass can fly backwards.  This is called:

• Backtrace

• Backspatter

• Backflash

• Backscatter

Which of the following is the correct formula for calculating the density of glass?

• D= m/V

• D= V/m

• D= m x V

• D= 2mV

Which glass break was made first?

• A

• B

What is the primary purpose of glass forensics in a criminal investigation?

• To determine the manufacturer of the glass

• To identify the type of glass used

• To link a suspect to a crime scene

• To assess the age of the glass

Which property of glass is most commonly analyzed in forensic investigations to determine its origin?

• Color

• Density

• Refractive index

• Thickness

In glass forensics, what does the term 'conchoidal fracture' refer to?

• A type of glass breakage pattern

• A method of glass analysis

• A chemical property of glass

• A tool used for glass examination

What is the significance of the refractive index in glass forensics?

• It helps in identifying the chemical composition of the glass

• It determines the glass's ability to conduct electricity

• It is used to match glass fragments to a common source

• It measures the glass's resistance to heat

Tags

NGSS.HS-PS4-3

Which of the following methods is used to compare glass fragments in forensic science?

• Chromatography

• Mass spectrometry

• Density gradient analysis

• X-ray diffraction

What is the first step in the forensic analysis of glass evidence?

• Measuring the thickness of the glass

• Collecting and preserving the glass fragments

• Determining the color of the glass

• Analyzing the chemical composition