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Expert Witness Evidence Evaluation CSI Agents: Radha Changela John Edmondson Jade Campbell Jonathan Freeman Slide 2 Physical Properties Physical Properties: A property of matter at which you can observe and measure. Metal 1: Properties, thick, non-bendable, mass 1.65 g, 1 mL of volume, density 1.65 g/mL, 23 Celsius, 2 cm long, non-magnetic Metal 2: Properties, thin, non-bendable, 2.35 g,.5 mL, density 4.7 g/mL, 23 Celsius, 3.9 cm long, Liquid: transparent,20.6 g, 23.25 mL, density.886 g/mL, 23.5 Celsius, White Powder: white, soft powdery substance Slide 3 Chemical Properties Chemical Properties: a property of matter that describes a substances ability that participate in chemical reactions. Metal 1: not flammable, does react with oxygen in the water, reacts with acids, reacts with oxygen in the air Metal 2: resistant to oxidation, conductive, flammable dissolves in acids, oxidizes in water Liquid 1: flammable, Mystery powder: Reacts with iodine, bubbles with vinegar, absorbs water Slide 4 Metal Samples Metal 2 Metal 1 Slide 5 Metal Evaluation Identity of sample 1 is: Aluminum Evidence: Not magnetic, 2.7g/cm3 (internet found), 1.65 g/mL (what we found) Aluminum Identity of sample 2: Steel Evidence: Magnetic, 7.83g/cm3 (internet found), 4.7 g/mL (what we found) Steel Magnetic Slide 6 Liquid Evaluation Identity of liquid sample: Rubbing Alcohol Evidence: Flammable, Density 0.7854 g/mL ( internet found),.886 g/mL (What we found), strong odor Alcohol Flammability Slide 7 Powder Evaluation Identity of powder: Baking Powder Evidence: Reacted with iodine, bubbled with vinegar, absorbed water Baking powder Slide 8 Summary We Concluded That. Metal 1 was: Aluminum Metal 2 was: Steel Liquid Sample 1: Rubbing Alcohol Powder Sample: Baking Powder