The Mystery Crime Scene CSI Agents: Caroline K., Hisham K., Jessica K., Perry J.

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Presentation transcript:

The Mystery Crime Scene CSI Agents: Caroline K., Hisham K., Jessica K., Perry J.

Physical Properties Characteristics of matter- measurable or observable (quantitative/qualitative) Does not require chemical reactions/change in identity to be observed Physical change doesn’t change physical properties

Examples Odor Color Volume Mass Density Thermal conductivity State Solubility Ductility Malleability Magnetism

Chemical Properties Viewed through chemical reactions & change in identity The ability of a substance to react with another substance (reactivity)

Examples Flammability Oxidation Combustibility

Metal Evidence Evaluation Metal Sample 1: Aluminum Metal Sample 2: Steel

Metal Evidence Evaluation Sample 1: Aluminum-.75 g. volume 4 g./mL. density 2.2 cm. long 16.5 grams

Metal Evidence Evaluation (Cont.) silver thick

Metal Evidence Evaluation Sample 2 Steel 4 cm. long 2.55 grams.5mL. volume 4.8 g./mL. density

Metal Evidence Evaluation (Cont.) Thin Dull

Metal Evidence Evaluation Supporting Evidence: Non-magnetic Different Densities: Aluminum is grams per cubic cm/ Steel is 7.8 grams per cubic cm.

Liquid Evidence Evaluation The identity of the liquid is alcohol Supporting Evidence Colorless Flammable Low viscosity Had the odor of alcohol

Liquid Evidence Evaluation (citation) "Isopropyl Alcohol." Chemical Compounds. Ed. Neil Schlager, Jayne Weisblatt, and David E. Newton. Vol. 2. Detroit: UXL, Science In Context. Web. 26 Aug

Powder Evidence Evaluation The powder’s identity is baking powder SubstancesWaterVinegarIodine Baking SodaAbsorbed water (no reaction) Fizzed and bubbled Absorbed iodine Turned orange (No reaction) Baking PowderAbsorbed water (no reaction) Fizzed and bubbled Turned black Absorbed iodine Baby PowderHydrophobic (Made water form into spherical drops) Hydrophobic (Formed bubbles) Absorbed Turned yellow (No reaction) Corn StarchAbsorbed water (no reaction) No reactionTurned black upon contact Mystery PowderAbsorbed water (no reaction) Fizzed and bubbled Turned black Absorbed iodine

Reaction with water Reaction with iodine Reaction with vinegar Mystery Powder Reactions

Powder Evidence Evaluation Identity of mystery powder is baking powder because they both: Had no reaction to water (hydrophobic) Fizzed and bubbled when came into contact with vinegar Turned black when came into contact with iodine

Conclusion Based on the evidence, we can conclude that:  The 1 st metal was aluminum  The 2 nd metal was steel  The liquid was alcohol  The powder was baking powder

Resources/Citations "Aluminum." World of Chemistry. Gale, Science In Context. Web. 26 Aug "Isopropyl Alcohol." Chemical Compounds. Ed. Neil Schlager, Jayne Weisblatt, and David E. Newton. Vol. 2. Detroit: UXL, Science In Context. Web. 26 Aug "Aluminum." Aluminum. N.p., n.d. Web. 26 Aug Prentice Hall Physical Science Textbook Georgia Holt Science and Technology Physical Science Textbook

Thank You For Your Attention