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Crime Busters Science Event - Student Preparation and Safety Guidelines

Learn how to prepare students for a Crime Busters science event with a focus on chemical analysis, chromatography, and crime scene evidence. Follow safety guidelines and recommended resources.

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Crime Busters Science Event - Student Preparation and Safety Guidelines

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  1. Science Crime Busters Lin Wozniewski lwoz@iun.edu

  2. Safety • Students must wear: • Closed shoes • Slacks or skirts that come to the ankles • Lab coat or lab apron • Indirect vent or unvented chemical splash proof goggles. No impact glasses or visorgogs are permitted

  3. Students can bring • Spot plate or something to do reactions in • Spoon or something to get powders out • Forceps • pH paper • Magnet • Hand lens

  4. Students Can Bring • Slide & cover slip • Pencil • Paper towels • 1 sheet of paper on which anything handwritten is acceptable. Sheets will be collected at the end of the event • A writing instrument • Nothing else is allowed

  5. Supervisors will provide • Unknowns • Iodine Solution • 1 M HCl • Differential Density materials • Chromatography Materials • Wash bottle with Distilled or ROI water • Candle and matches • Waste Container

  6. Supervisors may Provide • Microscope • Other reagents

  7. Main Focus • Chemical Analysis • Polymers • Chromatography • Crime Scene Physical Evidence • How to prepare students • Resources

  8. How To Prepare Students • Have students develop a dichotomous key for identifying chemicals • Practice identifying chemicals in as short a time as possible. • Practice identifying powders mixed in groups of 2 & 3 • Practice identifying plastics • Practice identifying hairs (only human, dog, cat possible) • Practice identifying fibers (only animal, vegetable, & synthetic possible)

  9. How to Prepare Students • Practice doing pen chromatograms • Practice doing juice chromatograms • Practice identifying fingerprints • Practice matching DNA chromatograms/electropherograms • Practice matching shoes & tires to their tracks • Try a liquid spatter activity • Practice using a waste container

  10. Resources • The National SO Website www.soinc.org • The information on my thumb drive

  11. Questions? • Thank You

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