CSI agents: Ambree Lavelle, Lauren Miceli, Casey Halloway.
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Transcript of CSI agents: Ambree Lavelle, Lauren Miceli, Casey Halloway.
EVIDENCE EVALUATION FROM A. WEST CRIME
SCENECSI agents: Ambree Lavelle, Lauren
Miceli, Casey Halloway
Physical Properties An observation A physical property is any characteristics
of matter that is observable or measureable.
Ex. Color, order, texture, shape, volume, mass,weight, size, temp., BP, etc.
Chemical Properties
Chemical properties describe matter based on it’s ability to change into new matter that has different properties.
Ability of a substance to react reactivity
Ex. Flammability, oxidize, combustibility
Metal Evidence Evaluation
Metal 1
Metal 2
Metal Evidence Evaluation
Identity of metal 1: steel Supporting evidence: Magnetic, thin, heavy, ductility,2.3 (mass)/1 (volume) 2.3g cm³ density, 7.83g/cm3 (internet found)
http://www.buzzle.com/articles/physical-properties-of-steel.html
Metal Evidence Evaluation
Identity of metal 2: Aluminum Supporting evidence:Non magnetic, fat, light, formability, malleability, 1.9 g/2 cm³, .95 cm³ density (what we found), 2.7g/cm3
http://www.hydro.com/en/Subsites/NorthAmerica/Aluminum/Properties-of-Aluminum/
Liquid Evaluation
Identity of liquid: Rubbing alcohol Evidence: smells, flammable, chemical
property, transparent, 21 cm³ (volume), 25.20 g (mass), density = 1.2 g/cm³
Powder Evidence
Mystery powder: baking powder Evidence: reacted with iodine (black),
reacted with vinegar (white, bubbled up, air bubbles appeared), became squishy and airy with water.
Mystery powder
Baking powder
Key:1st= react with water2nd= react with vinegar3rd= react to iodine
Summary We concluded that the metals found at
the A West crime scene were: Steel and Aluminum
The Liquid was rubbing alcohol
The Powder was baking powder