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https://docs.google.com/presentation/d/1TW2k-8grpLXElzuJRJs0fR0YpRQ-Fl95qDnLkqQbg4/copy
DENSITY CRIME SCENE
This table shows the densities of various substances.
Substance
Iron
Magnesium
Lithium
Nickel
Zinc
Aluminum
Calcium
Density (g/cm3)
7.87
1.74
0.53
8.9
7.14
2.7
1.54
Your evidence bag contains 3 unknown substances. You have found the
mass and volume of each substance and written the values into the table
below.
Next you must find the density of each substance and identify it using the
table above as a reference.
FORENSIC REPORT
Investigating Officer:
Date:
Substance#A
Substance#B
Substance#C
Mass(g)
3
4.2
5
Volume (cm3)
1.11
2.41
0.56
Density(g/cm3)
Case ID#Dn5iT1
Identity
4 suspects are in custody. They must be released shortly unless there’s further
evidence to warrant their continued detention. Based on your findings, which
of the suspects would you recommend that detectives keep for further
questioning?
POLICE REPORT
Investigating Officer:
Date:
Suspect#1
Suspect#2
Case ID#Dn5iT1
Description
Traces of iron (Fe) and zinc (Zn)found on clothing
Traces amounts of iron (Fe), nickel (Ni) and aluminium
(Al) found in suspects car.
Suspect#3
Magnesium (Mg), aluminum (Al) and zinc (Zn) found on
clothing
Suspect#4
Aluminum (Al), nickel (Ni) were found on the suspects
clothing. Trace amounts of magnesium (Mg) were found on
suspects hands.
RECOMMENDATIONS:
DENSITY CRIME SCENE
This table shows the densities of various substances.
Substance
Iron
Magnesium
Lithium
Nickel
Zinc
Aluminum
Calcium
Density (g/cm3)
7.87
1.74
0.53
8.9
7.14
2.7
1.54
Your evidence bag contains 3 unknown substances. You have found the
mass and volume of each substance and written the values into the table
below.
Next you must find the density of each substance and identify it using the
table above as a reference.
FORENSIC REPORT
Investigating Officer:
Date:
Substance#A
Substance#B
Substance#C
Mass(g)
3
4.2
5
Volume (cm3)
1.11
2.41
0.56
Density(g/cm3)
2.7
1.74
8.9
Case ID#Dn5iT1
Identity
Aluminum
Magnesium
Nickel
4 suspects are in custody. They must be released shortly unless there’s further
evidence to warrant their continued detention. Based on your findings, which
of the suspects would you recommend that detectives keep for further
questioning?
POLICE REPORT
Investigating Officer:
Date:
Suspect#1
Suspect#2
Case ID#Dn5iT1
Description
Traces of iron (Fe) and zinc (Zn)found on clothing
Traces amounts of iron (Fe), nickel (Ni) and aluminium
(Al) found in suspects car.
Suspect#3
Magnesium (Mg), aluminum (Al) and zinc (Zn) found on
clothing
Suspect#4
Aluminum (Al), nickel (Ni) were found on the suspects
clothing. Trace amounts of magnesium (Mg) were found on
suspects hands.
RECOMMENDATIONS:
Only suspect#4 has traces of all 3 elements found at the crime scene.