the w. houston crime scene
DESCRIPTION
AVI M. TED N. NICKY R. JESSICA M. THE W. HoUSToN CRIME SCENE. PHYSICAL PROPERTIES. A physical property is a property that can be observed or measured without changing the composition of matter. Examples: Color Hardness Malleability Viscosity Texture Odor Melting Point Etc. - PowerPoint PPT PresentationTRANSCRIPT
THE W. HOUSTON CRIME SCENE
AVI M. TED N. NICKY R.JESSICA M.
PHYSICAL PROPERTIES
A physical property is a property that can be observed or measured without changing the composition of matter.
Examples: Color Hardness Malleability Viscosity Texture Odor Melting Point Etc.
CHEMICAL PROPERTIES
A chemical property shows the ability for a substance to react to other substances.
Examples: Corrosion Oxidation
Sample 1
Sample 2
The Metal Samples
Sample 1 Evaluation
Identity of sample 1: Aluminum Supporting evidence:
Not magnetic Silver in color Density: 2.7g/mL Doesn’t oxidize quickly Conducts electricity
www.elmhurst.edu/~chm/vchembook/102aluminum.html supports this evidence
Sample 2 Evaluation
Identity of sample 2: Steel Supporting Evidence
Magnetic Dark grey color Density= 7.8 g/cm3 Harder (Scratch Test) lower thermal conductivity
http://www.ndted.org/EducationResources/CommunityCollege/Materials/Physical_Chemical/PhysicalProperties.htm
Supports this evidence
Mystery Powder Evaluation Identity of the mystery powder:
Baking soda Supporting Evidence
Baking soda had same reactionsBaking Powder
Baking Soda
CornStarch
Baby Powder
Mystery Powder
Water Bubbled
Fizzed Water turned yellow
Repelled water
Bubbled
Vinegar
Fizzed Fizzed Turned vinegar yellow
Repelled vinegar
Fizzed
Iodine Turned black
Absorbed Iodine
Turned black
Turned black
Turned black
Mystery Liquid
Identity of the mystery liquid: Rubbing Alcohol Supporting Evidence:
Flammable Smell Cold Clear Very high viscosity
Water Rubbing Alcohol
Mystery Liquid
Conclusion
Metal Sample 1 is Aluminum Metal Sample 2 is Steel The Mystery Powder is Baking
Powder The Mystery Liquid is Rubbing
Alcohol