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15-1: Glass Fracture Pattern Analysis

Last updated 8 months ago
17 questions
Note from the author:
PART A: ANALYZING GLASS FRACTURES
1

Examine the diagrams, which show a side view of a window before and after impact. Determine the point of impact and direction of force.

1

Based on observation of the broken glass in question 1, list two ways to determine the direction of impact.

0

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:

1

Which bullet struck first?

1
Concentric fractures were found on the outward facing side of the glass. This means that the bullets struck the glass __________ the shed.
1
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.

Other Answer Choices:
B
A
C
1
Review the following diagram showing four different impacts.
  1. What is the sequence of impacts?
Other Answer Choices:
A
C
D
B
PART B: CREATING GLASS FRACTURES
1

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

1

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.

PART C: THE 3R RULE
1
__________
0
1
1
Remember: the suspect was standing inside the house.
_______
1
Remember: the officer was standing outside the house.
_______
0
1

Begin your answer with "yes" or "no."
Explain please (1-2 sentences)

0