By the end of this activity, you will be able to:
Summarize how to determine the sequence of impacts on glass based on the fracture patterns.
Compare and contrast fracture patterns in tempered glass (safety glass) and window glass.
Analyze glass fracture patterns, and determine the sequence of impacts on the glass.
Strike a picture frame twice. Describe how the sequence of strikes can be determined through fracture pattern analysis.
By the end of this activity, you will be able to:
Summarize how to determine the sequence of impacts on glass based on the fracture patterns.
Compare and contrast fracture patterns in tempered glass (safety glass) and window glass.
Analyze glass fracture patterns, and determine the sequence of impacts on the glass.
Strike a picture frame twice. Describe how the sequence of strikes can be determined through fracture pattern analysis.
Examine the diagrams, which show a side view of a window before and after impact. Determine the point of impact and direction of force.
Based on observation of the broken glass in question 1, list two ways to determine the direction of impact.
Examine the photographs of tempered (safety) and window glass.
Two bullets penetrated the window of an old shed. Study the fracture patterns in the following diagram, and answer the following questions:
Which bullet struck first?
Concentric fractures were found on the outward facing side of the glass. This means that the bullets struck the glass the shed.
Refer to the following diagram of the glass fracture patterns produced by three different impacts. Which occurred first, second, and third? Be prepared to justify your answer.
Review the following diagram showing four different impacts.
What is the sequence of impacts?
Upload a picture of your cracked glass here! Please label:
a) primary fracture
b) secondary fracture
c) circle an area that helped you determine which fracture was primary/secondary
CREATIVE WRITING:
Write a crime-scene case study or scenario that involves the glass fracture pattern evidence that is consistent with the sketches in the activity or that is consistent with the glass fracture pattern you created in Part B.
Remember: the suspect was standing inside the house.
Remember: the officer was standing outside the house.
Begin your answer with "yes" or "no."
Explain please (1-2 sentences)
