Forensic Science Activity T. Trimpe 2007 http://sciencespot.net Tool

Forensic Science Activity T. Trimpe 2007 http://sciencespot.net Tool

Forensic Science Activity T. Trimpe 2007 http://sciencespot.net Tool Marks Lab Goal: Your group will need to examine and document the tool marks made by each of the tools. At each station, you will need to: 1 To prepare for the lab, roll the modeling clay into a flat circle that fits inside the plastic plate. Make several impressions of each tool in your slab of modeling clay.

2 Use the ruler to record the measurements for each tool and its impression surfaces. 3 Document any unique characteristics you notice on each tool or its impression. Write your observations on your worksheet. 4 After you have documents both of the tools at that station, roll the clay into a ball to prepare for the next group and wait until it's time to rotate to the next station. Features to analyze: Dimensions of the impression Ridges or striation patterns Defects, such as nicks and chips Paint chips or metal shards left on a tool

Image: http://www.maine.gov/dps/msp/criminal_investigation/crimelab/images/toolmarks1.jpg Tool Mark Challenge Work with your investigative team to identify the crime scene tools. Compare the tool marks you made earlier and match them to the crime scene tools. Once you have identified all the tools, have your answers checked by your teacher. Keep trying until you have them all correct!

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