03.05.doc - 03.05 Examining evidence lab Evidence and...

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03.05 Examining evidence lab Evidence and Physical properties Dark hair strand- 1. Straight 2. thin 3. long Cup- 1. glass 2. bubbles on the bottom 3. Half full Notebook Paper- 1. 1 red vertical line 2. 34 blue horizontal lines 3. Floppy Gun- 1.Matte finish 2.Metal 3.Black Shell casing- 1.Shiny 2.Small 3.Hard Unknown powder- 1.White 2.No smell 3.Around two tablespoons were recovered Light hair strand- 1. Curly 2. Thick 3. 5in. long when straight The pool of blood- 1. Dried 2. Red 3. 6in. diameter
Chair- 1. White 2. Black cushion 3. Wooden Table- 1. Wooden 2. Had shelf on bottom 3. White Would it be useful to test for chemical properties? Chemical testing can determine what is on the surface and what is in the air. I think it would be useful to test the chemical proprieties of the unknown substance. If you were to determine the chemical properties, you most likely would be able to determine what the substance is made of. Characteristics of Evidence The dark hair strand and light hair strand are individual evidence because they can be tested for DNA if the follicle is attached. If the hair didn’t have the follicle attached, it would be class evidence. The hair strands have an unknown origin but can be tested to see who it belonged to. The hair can play a huge role in the

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