evidence evaluation from the olympic village crime scene

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EVIDENCE EVALUATION FROM THE OLYMPIC VILLAGE CRIME SCENE CSI Agents: Jackson Sevy, Alex Smolyar, Sarah Sorensen and Tessa Stanton

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Evidence Evaluation from the Olympic Village Crime Scene . CSI Agents: Jackson Sevy , Alex Smolyar , Sarah Sorensen and Tessa Stanton. The Problem. Problem: Identify the mystery substances found at the crime scene. Identifications: Metal A was identified as steel. - PowerPoint PPT Presentation

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Page 1: Evidence Evaluation from the Olympic Village Crime Scene

EVIDENCE EVALUATION FROM THE OLYMPIC VILLAGE CRIME SCENE

CSI Agents:Jackson Sevy, Alex Smolyar, Sarah Sorensen and Tessa Stanton

Page 2: Evidence Evaluation from the Olympic Village Crime Scene

THE PROBLEMProblem: Identify the mystery substances found at the crime scene.

Identifications:Metal A was identified as steel.Metal B was identified as aluminum.The liquid was identified as rubbing alcohol.The powder was identified as baking powder.

Page 3: Evidence Evaluation from the Olympic Village Crime Scene

GENERAL INFORMATIONProperty: a property is a characteristic such as length (physical) or flammability (chemical.)

Matter: anything that takes up space and has mass.

Physical Property: a characteristic of matter such as color or odor.

Chemical Property: a characteristic of matter which describes a substance’s ability to participate in chemical reactions.

Chemical Reaction: a change that happens when one or more substances change into new substances with different properties.

Page 4: Evidence Evaluation from the Olympic Village Crime Scene

METAL EVALUATIONMetal A

Mass: 2.6 g Density:7.85g/cm³ Dark in color MagneticIdentity: Steel

Metal B Mass: 1.8 g Density: 2.7g/cm³ Metallic looking Not magneticIdentity: Aluminum

Metal Samples

Page 5: Evidence Evaluation from the Olympic Village Crime Scene

LIQUID EVALUATION Strong odor Transparent FlammableIdentity: Isopropyl Alcohol

Liquid Sample

Page 6: Evidence Evaluation from the Olympic Village Crime Scene

POWDER EVALUATIONWater Vinegar Iodine

Baking Powder • No reaction • Bubbling/Fizzing

• Turned black

Baking Soda • Slightly changed color

• Bubbling/Fizzing

• Hardened

• No reaction

Cornstarch • No reaction • No reaction • Turned blackBaby Powder • Solidified

• Soft outer shell

• Stayed in one bubble

• Solidified• Sticky• Soft outer

shell• Stayed in one

bubble

• No reaction

MYSTERY POWDER

• No reaction • Bubbling/Fizzing

• Turned black

Identity: Baking Powder

Page 7: Evidence Evaluation from the Olympic Village Crime Scene

EVIDENCE SUMMARYMetal A: SteelMetal B: AluminumLiquid: Isopropyl AlcoholPowder: Baking Powder

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