Slide 1

Science Crime Busters
Lin Wozniewski
[email protected]

Safety


Students must wear:
– Closed shoes
– Slacks or skirts that come to the ankles
– Sleeved shirts
– Lab coat or lab apron
– Indirect vent or unvented chemical splash
proof goggles. No impact glasses or
visorgogs are permitted

Students can bring
 Spot

plate or something to do
reactions in
 Spoon or something to get
powders out
 Forceps
 pH paper
 Magnet
 Hand lens

Students Can Bring
 Slide

& cover slip
 Pencil
 Paper towels
 1 sheet of paper on which anything
handwritten is acceptable.
 A writing instrument
 Nothing else is allowed

Supervisors will provide
 Unknowns
 Iodine

Solution
 1 M HCl
 Data Collection Device w/ probes
 Chromatography Materials
 Wash bottle with Distilled or ROI
water
 Waste Container
 Microscope
 Other Reagents

Main Focus
Chemical

Analysis
Water Testing
Chromatography
Crime Scene Physical
Evidence
How to prepare students
Resources

Qualitative Analysis
Liquids, except for water and hydrogen
peroxide, can be ID by either looking at
them or wafting them
 Metals can ID by looking at them or putting
a magnet by them, or seeing how fast they
react with water & HCl
 Single powders (event supervisors MUST
tell the students which are mixtures and
how many powders are present if any
have more than two) can often be ID by a
quick glance, or a test or two.


Water Testing









Students might need to test for heavy metals
using a calibration graph and a colorimeter.
Students might need to test for specific ions
using specific ion probes (such as Ammonium,
Calcium, Nitrates, etc.)
Students might be asked to test for Dissolved
Oxygen using a DO probe
Students might be asked to test for turbidity
using a turbidity probe.
Students might be asked to test for Total
Dissolved Solids (TDS) using a conductivity
probe
Students may be asked to determine if a source
of pollution is from a point or non-point source

Chromatography
At this level, the students can only be
asked to do paper chromatography.
 Students need to know how to spot both
pens and juices
 Students need to know how to do both
strip and sheet chromatograms.
 Students need to know to mark the line
to spot on and the type of material with
a pencil


“Fun” Forensic Physical Crime
Scene Evidence
Students need to know the basic three
types of fingerprints
 Students need to be able to match
pretty pictures of DNA
 Students need to be able to match the
positive and negative shoes/footprints
and Tires/Tire Tracks


How To Prepare Students
Have students develop a dichotomous
key for identifying chemicals
 Practice identifying chemicals in as
short a time as possible.
 Practice identifying powders mixed in
groups of 2 & 3
 Practice testing water
 Practice doing pen chromatograms
 Practice doing juice chromatograms


How to Prepare Students
Practice identifying fingerprints
 Practice matching DNA
chromatograms/electropherograms
 Practice matching shoes & tires to their
tracks
 Try a liquid spatter activity
 Practice using a waste container


Resources
The National SO Website www.soinc.org
 http://mypage.iu.edu/~lwoz/socrime/index
.htm


Questions?
Thank

You


Slide 2

Science Crime Busters
Lin Wozniewski
[email protected]

Safety


Students must wear:
– Closed shoes
– Slacks or skirts that come to the ankles
– Sleeved shirts
– Lab coat or lab apron
– Indirect vent or unvented chemical splash
proof goggles. No impact glasses or
visorgogs are permitted

Students can bring
 Spot

plate or something to do
reactions in
 Spoon or something to get
powders out
 Forceps
 pH paper
 Magnet
 Hand lens

Students Can Bring
 Slide

& cover slip
 Pencil
 Paper towels
 1 sheet of paper on which anything
handwritten is acceptable.
 A writing instrument
 Nothing else is allowed

Supervisors will provide
 Unknowns
 Iodine

Solution
 1 M HCl
 Data Collection Device w/ probes
 Chromatography Materials
 Wash bottle with Distilled or ROI
water
 Waste Container
 Microscope
 Other Reagents

Main Focus
Chemical

Analysis
Water Testing
Chromatography
Crime Scene Physical
Evidence
How to prepare students
Resources

Qualitative Analysis
Liquids, except for water and hydrogen
peroxide, can be ID by either looking at
them or wafting them
 Metals can ID by looking at them or putting
a magnet by them, or seeing how fast they
react with water & HCl
 Single powders (event supervisors MUST
tell the students which are mixtures and
how many powders are present if any
have more than two) can often be ID by a
quick glance, or a test or two.


Water Testing









Students might need to test for heavy metals
using a calibration graph and a colorimeter.
Students might need to test for specific ions
using specific ion probes (such as Ammonium,
Calcium, Nitrates, etc.)
Students might be asked to test for Dissolved
Oxygen using a DO probe
Students might be asked to test for turbidity
using a turbidity probe.
Students might be asked to test for Total
Dissolved Solids (TDS) using a conductivity
probe
Students may be asked to determine if a source
of pollution is from a point or non-point source

Chromatography
At this level, the students can only be
asked to do paper chromatography.
 Students need to know how to spot both
pens and juices
 Students need to know how to do both
strip and sheet chromatograms.
 Students need to know to mark the line
to spot on and the type of material with
a pencil


“Fun” Forensic Physical Crime
Scene Evidence
Students need to know the basic three
types of fingerprints
 Students need to be able to match
pretty pictures of DNA
 Students need to be able to match the
positive and negative shoes/footprints
and Tires/Tire Tracks


How To Prepare Students
Have students develop a dichotomous
key for identifying chemicals
 Practice identifying chemicals in as
short a time as possible.
 Practice identifying powders mixed in
groups of 2 & 3
 Practice testing water
 Practice doing pen chromatograms
 Practice doing juice chromatograms


How to Prepare Students
Practice identifying fingerprints
 Practice matching DNA
chromatograms/electropherograms
 Practice matching shoes & tires to their
tracks
 Try a liquid spatter activity
 Practice using a waste container


Resources
The National SO Website www.soinc.org
 http://mypage.iu.edu/~lwoz/socrime/index
.htm


Questions?
Thank

You


Slide 3

Science Crime Busters
Lin Wozniewski
[email protected]

Safety


Students must wear:
– Closed shoes
– Slacks or skirts that come to the ankles
– Sleeved shirts
– Lab coat or lab apron
– Indirect vent or unvented chemical splash
proof goggles. No impact glasses or
visorgogs are permitted

Students can bring
 Spot

plate or something to do
reactions in
 Spoon or something to get
powders out
 Forceps
 pH paper
 Magnet
 Hand lens

Students Can Bring
 Slide

& cover slip
 Pencil
 Paper towels
 1 sheet of paper on which anything
handwritten is acceptable.
 A writing instrument
 Nothing else is allowed

Supervisors will provide
 Unknowns
 Iodine

Solution
 1 M HCl
 Data Collection Device w/ probes
 Chromatography Materials
 Wash bottle with Distilled or ROI
water
 Waste Container
 Microscope
 Other Reagents

Main Focus
Chemical

Analysis
Water Testing
Chromatography
Crime Scene Physical
Evidence
How to prepare students
Resources

Qualitative Analysis
Liquids, except for water and hydrogen
peroxide, can be ID by either looking at
them or wafting them
 Metals can ID by looking at them or putting
a magnet by them, or seeing how fast they
react with water & HCl
 Single powders (event supervisors MUST
tell the students which are mixtures and
how many powders are present if any
have more than two) can often be ID by a
quick glance, or a test or two.


Water Testing









Students might need to test for heavy metals
using a calibration graph and a colorimeter.
Students might need to test for specific ions
using specific ion probes (such as Ammonium,
Calcium, Nitrates, etc.)
Students might be asked to test for Dissolved
Oxygen using a DO probe
Students might be asked to test for turbidity
using a turbidity probe.
Students might be asked to test for Total
Dissolved Solids (TDS) using a conductivity
probe
Students may be asked to determine if a source
of pollution is from a point or non-point source

Chromatography
At this level, the students can only be
asked to do paper chromatography.
 Students need to know how to spot both
pens and juices
 Students need to know how to do both
strip and sheet chromatograms.
 Students need to know to mark the line
to spot on and the type of material with
a pencil


“Fun” Forensic Physical Crime
Scene Evidence
Students need to know the basic three
types of fingerprints
 Students need to be able to match
pretty pictures of DNA
 Students need to be able to match the
positive and negative shoes/footprints
and Tires/Tire Tracks


How To Prepare Students
Have students develop a dichotomous
key for identifying chemicals
 Practice identifying chemicals in as
short a time as possible.
 Practice identifying powders mixed in
groups of 2 & 3
 Practice testing water
 Practice doing pen chromatograms
 Practice doing juice chromatograms


How to Prepare Students
Practice identifying fingerprints
 Practice matching DNA
chromatograms/electropherograms
 Practice matching shoes & tires to their
tracks
 Try a liquid spatter activity
 Practice using a waste container


Resources
The National SO Website www.soinc.org
 http://mypage.iu.edu/~lwoz/socrime/index
.htm


Questions?
Thank

You


Slide 4

Science Crime Busters
Lin Wozniewski
[email protected]

Safety


Students must wear:
– Closed shoes
– Slacks or skirts that come to the ankles
– Sleeved shirts
– Lab coat or lab apron
– Indirect vent or unvented chemical splash
proof goggles. No impact glasses or
visorgogs are permitted

Students can bring
 Spot

plate or something to do
reactions in
 Spoon or something to get
powders out
 Forceps
 pH paper
 Magnet
 Hand lens

Students Can Bring
 Slide

& cover slip
 Pencil
 Paper towels
 1 sheet of paper on which anything
handwritten is acceptable.
 A writing instrument
 Nothing else is allowed

Supervisors will provide
 Unknowns
 Iodine

Solution
 1 M HCl
 Data Collection Device w/ probes
 Chromatography Materials
 Wash bottle with Distilled or ROI
water
 Waste Container
 Microscope
 Other Reagents

Main Focus
Chemical

Analysis
Water Testing
Chromatography
Crime Scene Physical
Evidence
How to prepare students
Resources

Qualitative Analysis
Liquids, except for water and hydrogen
peroxide, can be ID by either looking at
them or wafting them
 Metals can ID by looking at them or putting
a magnet by them, or seeing how fast they
react with water & HCl
 Single powders (event supervisors MUST
tell the students which are mixtures and
how many powders are present if any
have more than two) can often be ID by a
quick glance, or a test or two.


Water Testing









Students might need to test for heavy metals
using a calibration graph and a colorimeter.
Students might need to test for specific ions
using specific ion probes (such as Ammonium,
Calcium, Nitrates, etc.)
Students might be asked to test for Dissolved
Oxygen using a DO probe
Students might be asked to test for turbidity
using a turbidity probe.
Students might be asked to test for Total
Dissolved Solids (TDS) using a conductivity
probe
Students may be asked to determine if a source
of pollution is from a point or non-point source

Chromatography
At this level, the students can only be
asked to do paper chromatography.
 Students need to know how to spot both
pens and juices
 Students need to know how to do both
strip and sheet chromatograms.
 Students need to know to mark the line
to spot on and the type of material with
a pencil


“Fun” Forensic Physical Crime
Scene Evidence
Students need to know the basic three
types of fingerprints
 Students need to be able to match
pretty pictures of DNA
 Students need to be able to match the
positive and negative shoes/footprints
and Tires/Tire Tracks


How To Prepare Students
Have students develop a dichotomous
key for identifying chemicals
 Practice identifying chemicals in as
short a time as possible.
 Practice identifying powders mixed in
groups of 2 & 3
 Practice testing water
 Practice doing pen chromatograms
 Practice doing juice chromatograms


How to Prepare Students
Practice identifying fingerprints
 Practice matching DNA
chromatograms/electropherograms
 Practice matching shoes & tires to their
tracks
 Try a liquid spatter activity
 Practice using a waste container


Resources
The National SO Website www.soinc.org
 http://mypage.iu.edu/~lwoz/socrime/index
.htm


Questions?
Thank

You


Slide 5

Science Crime Busters
Lin Wozniewski
[email protected]

Safety


Students must wear:
– Closed shoes
– Slacks or skirts that come to the ankles
– Sleeved shirts
– Lab coat or lab apron
– Indirect vent or unvented chemical splash
proof goggles. No impact glasses or
visorgogs are permitted

Students can bring
 Spot

plate or something to do
reactions in
 Spoon or something to get
powders out
 Forceps
 pH paper
 Magnet
 Hand lens

Students Can Bring
 Slide

& cover slip
 Pencil
 Paper towels
 1 sheet of paper on which anything
handwritten is acceptable.
 A writing instrument
 Nothing else is allowed

Supervisors will provide
 Unknowns
 Iodine

Solution
 1 M HCl
 Data Collection Device w/ probes
 Chromatography Materials
 Wash bottle with Distilled or ROI
water
 Waste Container
 Microscope
 Other Reagents

Main Focus
Chemical

Analysis
Water Testing
Chromatography
Crime Scene Physical
Evidence
How to prepare students
Resources

Qualitative Analysis
Liquids, except for water and hydrogen
peroxide, can be ID by either looking at
them or wafting them
 Metals can ID by looking at them or putting
a magnet by them, or seeing how fast they
react with water & HCl
 Single powders (event supervisors MUST
tell the students which are mixtures and
how many powders are present if any
have more than two) can often be ID by a
quick glance, or a test or two.


Water Testing









Students might need to test for heavy metals
using a calibration graph and a colorimeter.
Students might need to test for specific ions
using specific ion probes (such as Ammonium,
Calcium, Nitrates, etc.)
Students might be asked to test for Dissolved
Oxygen using a DO probe
Students might be asked to test for turbidity
using a turbidity probe.
Students might be asked to test for Total
Dissolved Solids (TDS) using a conductivity
probe
Students may be asked to determine if a source
of pollution is from a point or non-point source

Chromatography
At this level, the students can only be
asked to do paper chromatography.
 Students need to know how to spot both
pens and juices
 Students need to know how to do both
strip and sheet chromatograms.
 Students need to know to mark the line
to spot on and the type of material with
a pencil


“Fun” Forensic Physical Crime
Scene Evidence
Students need to know the basic three
types of fingerprints
 Students need to be able to match
pretty pictures of DNA
 Students need to be able to match the
positive and negative shoes/footprints
and Tires/Tire Tracks


How To Prepare Students
Have students develop a dichotomous
key for identifying chemicals
 Practice identifying chemicals in as
short a time as possible.
 Practice identifying powders mixed in
groups of 2 & 3
 Practice testing water
 Practice doing pen chromatograms
 Practice doing juice chromatograms


How to Prepare Students
Practice identifying fingerprints
 Practice matching DNA
chromatograms/electropherograms
 Practice matching shoes & tires to their
tracks
 Try a liquid spatter activity
 Practice using a waste container


Resources
The National SO Website www.soinc.org
 http://mypage.iu.edu/~lwoz/socrime/index
.htm


Questions?
Thank

You


Slide 6

Science Crime Busters
Lin Wozniewski
[email protected]

Safety


Students must wear:
– Closed shoes
– Slacks or skirts that come to the ankles
– Sleeved shirts
– Lab coat or lab apron
– Indirect vent or unvented chemical splash
proof goggles. No impact glasses or
visorgogs are permitted

Students can bring
 Spot

plate or something to do
reactions in
 Spoon or something to get
powders out
 Forceps
 pH paper
 Magnet
 Hand lens

Students Can Bring
 Slide

& cover slip
 Pencil
 Paper towels
 1 sheet of paper on which anything
handwritten is acceptable.
 A writing instrument
 Nothing else is allowed

Supervisors will provide
 Unknowns
 Iodine

Solution
 1 M HCl
 Data Collection Device w/ probes
 Chromatography Materials
 Wash bottle with Distilled or ROI
water
 Waste Container
 Microscope
 Other Reagents

Main Focus
Chemical

Analysis
Water Testing
Chromatography
Crime Scene Physical
Evidence
How to prepare students
Resources

Qualitative Analysis
Liquids, except for water and hydrogen
peroxide, can be ID by either looking at
them or wafting them
 Metals can ID by looking at them or putting
a magnet by them, or seeing how fast they
react with water & HCl
 Single powders (event supervisors MUST
tell the students which are mixtures and
how many powders are present if any
have more than two) can often be ID by a
quick glance, or a test or two.


Water Testing









Students might need to test for heavy metals
using a calibration graph and a colorimeter.
Students might need to test for specific ions
using specific ion probes (such as Ammonium,
Calcium, Nitrates, etc.)
Students might be asked to test for Dissolved
Oxygen using a DO probe
Students might be asked to test for turbidity
using a turbidity probe.
Students might be asked to test for Total
Dissolved Solids (TDS) using a conductivity
probe
Students may be asked to determine if a source
of pollution is from a point or non-point source

Chromatography
At this level, the students can only be
asked to do paper chromatography.
 Students need to know how to spot both
pens and juices
 Students need to know how to do both
strip and sheet chromatograms.
 Students need to know to mark the line
to spot on and the type of material with
a pencil


“Fun” Forensic Physical Crime
Scene Evidence
Students need to know the basic three
types of fingerprints
 Students need to be able to match
pretty pictures of DNA
 Students need to be able to match the
positive and negative shoes/footprints
and Tires/Tire Tracks


How To Prepare Students
Have students develop a dichotomous
key for identifying chemicals
 Practice identifying chemicals in as
short a time as possible.
 Practice identifying powders mixed in
groups of 2 & 3
 Practice testing water
 Practice doing pen chromatograms
 Practice doing juice chromatograms


How to Prepare Students
Practice identifying fingerprints
 Practice matching DNA
chromatograms/electropherograms
 Practice matching shoes & tires to their
tracks
 Try a liquid spatter activity
 Practice using a waste container


Resources
The National SO Website www.soinc.org
 http://mypage.iu.edu/~lwoz/socrime/index
.htm


Questions?
Thank

You


Slide 7

Science Crime Busters
Lin Wozniewski
[email protected]

Safety


Students must wear:
– Closed shoes
– Slacks or skirts that come to the ankles
– Sleeved shirts
– Lab coat or lab apron
– Indirect vent or unvented chemical splash
proof goggles. No impact glasses or
visorgogs are permitted

Students can bring
 Spot

plate or something to do
reactions in
 Spoon or something to get
powders out
 Forceps
 pH paper
 Magnet
 Hand lens

Students Can Bring
 Slide

& cover slip
 Pencil
 Paper towels
 1 sheet of paper on which anything
handwritten is acceptable.
 A writing instrument
 Nothing else is allowed

Supervisors will provide
 Unknowns
 Iodine

Solution
 1 M HCl
 Data Collection Device w/ probes
 Chromatography Materials
 Wash bottle with Distilled or ROI
water
 Waste Container
 Microscope
 Other Reagents

Main Focus
Chemical

Analysis
Water Testing
Chromatography
Crime Scene Physical
Evidence
How to prepare students
Resources

Qualitative Analysis
Liquids, except for water and hydrogen
peroxide, can be ID by either looking at
them or wafting them
 Metals can ID by looking at them or putting
a magnet by them, or seeing how fast they
react with water & HCl
 Single powders (event supervisors MUST
tell the students which are mixtures and
how many powders are present if any
have more than two) can often be ID by a
quick glance, or a test or two.


Water Testing









Students might need to test for heavy metals
using a calibration graph and a colorimeter.
Students might need to test for specific ions
using specific ion probes (such as Ammonium,
Calcium, Nitrates, etc.)
Students might be asked to test for Dissolved
Oxygen using a DO probe
Students might be asked to test for turbidity
using a turbidity probe.
Students might be asked to test for Total
Dissolved Solids (TDS) using a conductivity
probe
Students may be asked to determine if a source
of pollution is from a point or non-point source

Chromatography
At this level, the students can only be
asked to do paper chromatography.
 Students need to know how to spot both
pens and juices
 Students need to know how to do both
strip and sheet chromatograms.
 Students need to know to mark the line
to spot on and the type of material with
a pencil


“Fun” Forensic Physical Crime
Scene Evidence
Students need to know the basic three
types of fingerprints
 Students need to be able to match
pretty pictures of DNA
 Students need to be able to match the
positive and negative shoes/footprints
and Tires/Tire Tracks


How To Prepare Students
Have students develop a dichotomous
key for identifying chemicals
 Practice identifying chemicals in as
short a time as possible.
 Practice identifying powders mixed in
groups of 2 & 3
 Practice testing water
 Practice doing pen chromatograms
 Practice doing juice chromatograms


How to Prepare Students
Practice identifying fingerprints
 Practice matching DNA
chromatograms/electropherograms
 Practice matching shoes & tires to their
tracks
 Try a liquid spatter activity
 Practice using a waste container


Resources
The National SO Website www.soinc.org
 http://mypage.iu.edu/~lwoz/socrime/index
.htm


Questions?
Thank

You


Slide 8

Science Crime Busters
Lin Wozniewski
[email protected]

Safety


Students must wear:
– Closed shoes
– Slacks or skirts that come to the ankles
– Sleeved shirts
– Lab coat or lab apron
– Indirect vent or unvented chemical splash
proof goggles. No impact glasses or
visorgogs are permitted

Students can bring
 Spot

plate or something to do
reactions in
 Spoon or something to get
powders out
 Forceps
 pH paper
 Magnet
 Hand lens

Students Can Bring
 Slide

& cover slip
 Pencil
 Paper towels
 1 sheet of paper on which anything
handwritten is acceptable.
 A writing instrument
 Nothing else is allowed

Supervisors will provide
 Unknowns
 Iodine

Solution
 1 M HCl
 Data Collection Device w/ probes
 Chromatography Materials
 Wash bottle with Distilled or ROI
water
 Waste Container
 Microscope
 Other Reagents

Main Focus
Chemical

Analysis
Water Testing
Chromatography
Crime Scene Physical
Evidence
How to prepare students
Resources

Qualitative Analysis
Liquids, except for water and hydrogen
peroxide, can be ID by either looking at
them or wafting them
 Metals can ID by looking at them or putting
a magnet by them, or seeing how fast they
react with water & HCl
 Single powders (event supervisors MUST
tell the students which are mixtures and
how many powders are present if any
have more than two) can often be ID by a
quick glance, or a test or two.


Water Testing









Students might need to test for heavy metals
using a calibration graph and a colorimeter.
Students might need to test for specific ions
using specific ion probes (such as Ammonium,
Calcium, Nitrates, etc.)
Students might be asked to test for Dissolved
Oxygen using a DO probe
Students might be asked to test for turbidity
using a turbidity probe.
Students might be asked to test for Total
Dissolved Solids (TDS) using a conductivity
probe
Students may be asked to determine if a source
of pollution is from a point or non-point source

Chromatography
At this level, the students can only be
asked to do paper chromatography.
 Students need to know how to spot both
pens and juices
 Students need to know how to do both
strip and sheet chromatograms.
 Students need to know to mark the line
to spot on and the type of material with
a pencil


“Fun” Forensic Physical Crime
Scene Evidence
Students need to know the basic three
types of fingerprints
 Students need to be able to match
pretty pictures of DNA
 Students need to be able to match the
positive and negative shoes/footprints
and Tires/Tire Tracks


How To Prepare Students
Have students develop a dichotomous
key for identifying chemicals
 Practice identifying chemicals in as
short a time as possible.
 Practice identifying powders mixed in
groups of 2 & 3
 Practice testing water
 Practice doing pen chromatograms
 Practice doing juice chromatograms


How to Prepare Students
Practice identifying fingerprints
 Practice matching DNA
chromatograms/electropherograms
 Practice matching shoes & tires to their
tracks
 Try a liquid spatter activity
 Practice using a waste container


Resources
The National SO Website www.soinc.org
 http://mypage.iu.edu/~lwoz/socrime/index
.htm


Questions?
Thank

You


Slide 9

Science Crime Busters
Lin Wozniewski
[email protected]

Safety


Students must wear:
– Closed shoes
– Slacks or skirts that come to the ankles
– Sleeved shirts
– Lab coat or lab apron
– Indirect vent or unvented chemical splash
proof goggles. No impact glasses or
visorgogs are permitted

Students can bring
 Spot

plate or something to do
reactions in
 Spoon or something to get
powders out
 Forceps
 pH paper
 Magnet
 Hand lens

Students Can Bring
 Slide

& cover slip
 Pencil
 Paper towels
 1 sheet of paper on which anything
handwritten is acceptable.
 A writing instrument
 Nothing else is allowed

Supervisors will provide
 Unknowns
 Iodine

Solution
 1 M HCl
 Data Collection Device w/ probes
 Chromatography Materials
 Wash bottle with Distilled or ROI
water
 Waste Container
 Microscope
 Other Reagents

Main Focus
Chemical

Analysis
Water Testing
Chromatography
Crime Scene Physical
Evidence
How to prepare students
Resources

Qualitative Analysis
Liquids, except for water and hydrogen
peroxide, can be ID by either looking at
them or wafting them
 Metals can ID by looking at them or putting
a magnet by them, or seeing how fast they
react with water & HCl
 Single powders (event supervisors MUST
tell the students which are mixtures and
how many powders are present if any
have more than two) can often be ID by a
quick glance, or a test or two.


Water Testing









Students might need to test for heavy metals
using a calibration graph and a colorimeter.
Students might need to test for specific ions
using specific ion probes (such as Ammonium,
Calcium, Nitrates, etc.)
Students might be asked to test for Dissolved
Oxygen using a DO probe
Students might be asked to test for turbidity
using a turbidity probe.
Students might be asked to test for Total
Dissolved Solids (TDS) using a conductivity
probe
Students may be asked to determine if a source
of pollution is from a point or non-point source

Chromatography
At this level, the students can only be
asked to do paper chromatography.
 Students need to know how to spot both
pens and juices
 Students need to know how to do both
strip and sheet chromatograms.
 Students need to know to mark the line
to spot on and the type of material with
a pencil


“Fun” Forensic Physical Crime
Scene Evidence
Students need to know the basic three
types of fingerprints
 Students need to be able to match
pretty pictures of DNA
 Students need to be able to match the
positive and negative shoes/footprints
and Tires/Tire Tracks


How To Prepare Students
Have students develop a dichotomous
key for identifying chemicals
 Practice identifying chemicals in as
short a time as possible.
 Practice identifying powders mixed in
groups of 2 & 3
 Practice testing water
 Practice doing pen chromatograms
 Practice doing juice chromatograms


How to Prepare Students
Practice identifying fingerprints
 Practice matching DNA
chromatograms/electropherograms
 Practice matching shoes & tires to their
tracks
 Try a liquid spatter activity
 Practice using a waste container


Resources
The National SO Website www.soinc.org
 http://mypage.iu.edu/~lwoz/socrime/index
.htm


Questions?
Thank

You


Slide 10

Science Crime Busters
Lin Wozniewski
[email protected]

Safety


Students must wear:
– Closed shoes
– Slacks or skirts that come to the ankles
– Sleeved shirts
– Lab coat or lab apron
– Indirect vent or unvented chemical splash
proof goggles. No impact glasses or
visorgogs are permitted

Students can bring
 Spot

plate or something to do
reactions in
 Spoon or something to get
powders out
 Forceps
 pH paper
 Magnet
 Hand lens

Students Can Bring
 Slide

& cover slip
 Pencil
 Paper towels
 1 sheet of paper on which anything
handwritten is acceptable.
 A writing instrument
 Nothing else is allowed

Supervisors will provide
 Unknowns
 Iodine

Solution
 1 M HCl
 Data Collection Device w/ probes
 Chromatography Materials
 Wash bottle with Distilled or ROI
water
 Waste Container
 Microscope
 Other Reagents

Main Focus
Chemical

Analysis
Water Testing
Chromatography
Crime Scene Physical
Evidence
How to prepare students
Resources

Qualitative Analysis
Liquids, except for water and hydrogen
peroxide, can be ID by either looking at
them or wafting them
 Metals can ID by looking at them or putting
a magnet by them, or seeing how fast they
react with water & HCl
 Single powders (event supervisors MUST
tell the students which are mixtures and
how many powders are present if any
have more than two) can often be ID by a
quick glance, or a test or two.


Water Testing









Students might need to test for heavy metals
using a calibration graph and a colorimeter.
Students might need to test for specific ions
using specific ion probes (such as Ammonium,
Calcium, Nitrates, etc.)
Students might be asked to test for Dissolved
Oxygen using a DO probe
Students might be asked to test for turbidity
using a turbidity probe.
Students might be asked to test for Total
Dissolved Solids (TDS) using a conductivity
probe
Students may be asked to determine if a source
of pollution is from a point or non-point source

Chromatography
At this level, the students can only be
asked to do paper chromatography.
 Students need to know how to spot both
pens and juices
 Students need to know how to do both
strip and sheet chromatograms.
 Students need to know to mark the line
to spot on and the type of material with
a pencil


“Fun” Forensic Physical Crime
Scene Evidence
Students need to know the basic three
types of fingerprints
 Students need to be able to match
pretty pictures of DNA
 Students need to be able to match the
positive and negative shoes/footprints
and Tires/Tire Tracks


How To Prepare Students
Have students develop a dichotomous
key for identifying chemicals
 Practice identifying chemicals in as
short a time as possible.
 Practice identifying powders mixed in
groups of 2 & 3
 Practice testing water
 Practice doing pen chromatograms
 Practice doing juice chromatograms


How to Prepare Students
Practice identifying fingerprints
 Practice matching DNA
chromatograms/electropherograms
 Practice matching shoes & tires to their
tracks
 Try a liquid spatter activity
 Practice using a waste container


Resources
The National SO Website www.soinc.org
 http://mypage.iu.edu/~lwoz/socrime/index
.htm


Questions?
Thank

You


Slide 11

Science Crime Busters
Lin Wozniewski
[email protected]

Safety


Students must wear:
– Closed shoes
– Slacks or skirts that come to the ankles
– Sleeved shirts
– Lab coat or lab apron
– Indirect vent or unvented chemical splash
proof goggles. No impact glasses or
visorgogs are permitted

Students can bring
 Spot

plate or something to do
reactions in
 Spoon or something to get
powders out
 Forceps
 pH paper
 Magnet
 Hand lens

Students Can Bring
 Slide

& cover slip
 Pencil
 Paper towels
 1 sheet of paper on which anything
handwritten is acceptable.
 A writing instrument
 Nothing else is allowed

Supervisors will provide
 Unknowns
 Iodine

Solution
 1 M HCl
 Data Collection Device w/ probes
 Chromatography Materials
 Wash bottle with Distilled or ROI
water
 Waste Container
 Microscope
 Other Reagents

Main Focus
Chemical

Analysis
Water Testing
Chromatography
Crime Scene Physical
Evidence
How to prepare students
Resources

Qualitative Analysis
Liquids, except for water and hydrogen
peroxide, can be ID by either looking at
them or wafting them
 Metals can ID by looking at them or putting
a magnet by them, or seeing how fast they
react with water & HCl
 Single powders (event supervisors MUST
tell the students which are mixtures and
how many powders are present if any
have more than two) can often be ID by a
quick glance, or a test or two.


Water Testing









Students might need to test for heavy metals
using a calibration graph and a colorimeter.
Students might need to test for specific ions
using specific ion probes (such as Ammonium,
Calcium, Nitrates, etc.)
Students might be asked to test for Dissolved
Oxygen using a DO probe
Students might be asked to test for turbidity
using a turbidity probe.
Students might be asked to test for Total
Dissolved Solids (TDS) using a conductivity
probe
Students may be asked to determine if a source
of pollution is from a point or non-point source

Chromatography
At this level, the students can only be
asked to do paper chromatography.
 Students need to know how to spot both
pens and juices
 Students need to know how to do both
strip and sheet chromatograms.
 Students need to know to mark the line
to spot on and the type of material with
a pencil


“Fun” Forensic Physical Crime
Scene Evidence
Students need to know the basic three
types of fingerprints
 Students need to be able to match
pretty pictures of DNA
 Students need to be able to match the
positive and negative shoes/footprints
and Tires/Tire Tracks


How To Prepare Students
Have students develop a dichotomous
key for identifying chemicals
 Practice identifying chemicals in as
short a time as possible.
 Practice identifying powders mixed in
groups of 2 & 3
 Practice testing water
 Practice doing pen chromatograms
 Practice doing juice chromatograms


How to Prepare Students
Practice identifying fingerprints
 Practice matching DNA
chromatograms/electropherograms
 Practice matching shoes & tires to their
tracks
 Try a liquid spatter activity
 Practice using a waste container


Resources
The National SO Website www.soinc.org
 http://mypage.iu.edu/~lwoz/socrime/index
.htm


Questions?
Thank

You


Slide 12

Science Crime Busters
Lin Wozniewski
[email protected]

Safety


Students must wear:
– Closed shoes
– Slacks or skirts that come to the ankles
– Sleeved shirts
– Lab coat or lab apron
– Indirect vent or unvented chemical splash
proof goggles. No impact glasses or
visorgogs are permitted

Students can bring
 Spot

plate or something to do
reactions in
 Spoon or something to get
powders out
 Forceps
 pH paper
 Magnet
 Hand lens

Students Can Bring
 Slide

& cover slip
 Pencil
 Paper towels
 1 sheet of paper on which anything
handwritten is acceptable.
 A writing instrument
 Nothing else is allowed

Supervisors will provide
 Unknowns
 Iodine

Solution
 1 M HCl
 Data Collection Device w/ probes
 Chromatography Materials
 Wash bottle with Distilled or ROI
water
 Waste Container
 Microscope
 Other Reagents

Main Focus
Chemical

Analysis
Water Testing
Chromatography
Crime Scene Physical
Evidence
How to prepare students
Resources

Qualitative Analysis
Liquids, except for water and hydrogen
peroxide, can be ID by either looking at
them or wafting them
 Metals can ID by looking at them or putting
a magnet by them, or seeing how fast they
react with water & HCl
 Single powders (event supervisors MUST
tell the students which are mixtures and
how many powders are present if any
have more than two) can often be ID by a
quick glance, or a test or two.


Water Testing









Students might need to test for heavy metals
using a calibration graph and a colorimeter.
Students might need to test for specific ions
using specific ion probes (such as Ammonium,
Calcium, Nitrates, etc.)
Students might be asked to test for Dissolved
Oxygen using a DO probe
Students might be asked to test for turbidity
using a turbidity probe.
Students might be asked to test for Total
Dissolved Solids (TDS) using a conductivity
probe
Students may be asked to determine if a source
of pollution is from a point or non-point source

Chromatography
At this level, the students can only be
asked to do paper chromatography.
 Students need to know how to spot both
pens and juices
 Students need to know how to do both
strip and sheet chromatograms.
 Students need to know to mark the line
to spot on and the type of material with
a pencil


“Fun” Forensic Physical Crime
Scene Evidence
Students need to know the basic three
types of fingerprints
 Students need to be able to match
pretty pictures of DNA
 Students need to be able to match the
positive and negative shoes/footprints
and Tires/Tire Tracks


How To Prepare Students
Have students develop a dichotomous
key for identifying chemicals
 Practice identifying chemicals in as
short a time as possible.
 Practice identifying powders mixed in
groups of 2 & 3
 Practice testing water
 Practice doing pen chromatograms
 Practice doing juice chromatograms


How to Prepare Students
Practice identifying fingerprints
 Practice matching DNA
chromatograms/electropherograms
 Practice matching shoes & tires to their
tracks
 Try a liquid spatter activity
 Practice using a waste container


Resources
The National SO Website www.soinc.org
 http://mypage.iu.edu/~lwoz/socrime/index
.htm


Questions?
Thank

You


Slide 13

Science Crime Busters
Lin Wozniewski
[email protected]

Safety


Students must wear:
– Closed shoes
– Slacks or skirts that come to the ankles
– Sleeved shirts
– Lab coat or lab apron
– Indirect vent or unvented chemical splash
proof goggles. No impact glasses or
visorgogs are permitted

Students can bring
 Spot

plate or something to do
reactions in
 Spoon or something to get
powders out
 Forceps
 pH paper
 Magnet
 Hand lens

Students Can Bring
 Slide

& cover slip
 Pencil
 Paper towels
 1 sheet of paper on which anything
handwritten is acceptable.
 A writing instrument
 Nothing else is allowed

Supervisors will provide
 Unknowns
 Iodine

Solution
 1 M HCl
 Data Collection Device w/ probes
 Chromatography Materials
 Wash bottle with Distilled or ROI
water
 Waste Container
 Microscope
 Other Reagents

Main Focus
Chemical

Analysis
Water Testing
Chromatography
Crime Scene Physical
Evidence
How to prepare students
Resources

Qualitative Analysis
Liquids, except for water and hydrogen
peroxide, can be ID by either looking at
them or wafting them
 Metals can ID by looking at them or putting
a magnet by them, or seeing how fast they
react with water & HCl
 Single powders (event supervisors MUST
tell the students which are mixtures and
how many powders are present if any
have more than two) can often be ID by a
quick glance, or a test or two.


Water Testing









Students might need to test for heavy metals
using a calibration graph and a colorimeter.
Students might need to test for specific ions
using specific ion probes (such as Ammonium,
Calcium, Nitrates, etc.)
Students might be asked to test for Dissolved
Oxygen using a DO probe
Students might be asked to test for turbidity
using a turbidity probe.
Students might be asked to test for Total
Dissolved Solids (TDS) using a conductivity
probe
Students may be asked to determine if a source
of pollution is from a point or non-point source

Chromatography
At this level, the students can only be
asked to do paper chromatography.
 Students need to know how to spot both
pens and juices
 Students need to know how to do both
strip and sheet chromatograms.
 Students need to know to mark the line
to spot on and the type of material with
a pencil


“Fun” Forensic Physical Crime
Scene Evidence
Students need to know the basic three
types of fingerprints
 Students need to be able to match
pretty pictures of DNA
 Students need to be able to match the
positive and negative shoes/footprints
and Tires/Tire Tracks


How To Prepare Students
Have students develop a dichotomous
key for identifying chemicals
 Practice identifying chemicals in as
short a time as possible.
 Practice identifying powders mixed in
groups of 2 & 3
 Practice testing water
 Practice doing pen chromatograms
 Practice doing juice chromatograms


How to Prepare Students
Practice identifying fingerprints
 Practice matching DNA
chromatograms/electropherograms
 Practice matching shoes & tires to their
tracks
 Try a liquid spatter activity
 Practice using a waste container


Resources
The National SO Website www.soinc.org
 http://mypage.iu.edu/~lwoz/socrime/index
.htm


Questions?
Thank

You


Slide 14

Science Crime Busters
Lin Wozniewski
[email protected]

Safety


Students must wear:
– Closed shoes
– Slacks or skirts that come to the ankles
– Sleeved shirts
– Lab coat or lab apron
– Indirect vent or unvented chemical splash
proof goggles. No impact glasses or
visorgogs are permitted

Students can bring
 Spot

plate or something to do
reactions in
 Spoon or something to get
powders out
 Forceps
 pH paper
 Magnet
 Hand lens

Students Can Bring
 Slide

& cover slip
 Pencil
 Paper towels
 1 sheet of paper on which anything
handwritten is acceptable.
 A writing instrument
 Nothing else is allowed

Supervisors will provide
 Unknowns
 Iodine

Solution
 1 M HCl
 Data Collection Device w/ probes
 Chromatography Materials
 Wash bottle with Distilled or ROI
water
 Waste Container
 Microscope
 Other Reagents

Main Focus
Chemical

Analysis
Water Testing
Chromatography
Crime Scene Physical
Evidence
How to prepare students
Resources

Qualitative Analysis
Liquids, except for water and hydrogen
peroxide, can be ID by either looking at
them or wafting them
 Metals can ID by looking at them or putting
a magnet by them, or seeing how fast they
react with water & HCl
 Single powders (event supervisors MUST
tell the students which are mixtures and
how many powders are present if any
have more than two) can often be ID by a
quick glance, or a test or two.


Water Testing









Students might need to test for heavy metals
using a calibration graph and a colorimeter.
Students might need to test for specific ions
using specific ion probes (such as Ammonium,
Calcium, Nitrates, etc.)
Students might be asked to test for Dissolved
Oxygen using a DO probe
Students might be asked to test for turbidity
using a turbidity probe.
Students might be asked to test for Total
Dissolved Solids (TDS) using a conductivity
probe
Students may be asked to determine if a source
of pollution is from a point or non-point source

Chromatography
At this level, the students can only be
asked to do paper chromatography.
 Students need to know how to spot both
pens and juices
 Students need to know how to do both
strip and sheet chromatograms.
 Students need to know to mark the line
to spot on and the type of material with
a pencil


“Fun” Forensic Physical Crime
Scene Evidence
Students need to know the basic three
types of fingerprints
 Students need to be able to match
pretty pictures of DNA
 Students need to be able to match the
positive and negative shoes/footprints
and Tires/Tire Tracks


How To Prepare Students
Have students develop a dichotomous
key for identifying chemicals
 Practice identifying chemicals in as
short a time as possible.
 Practice identifying powders mixed in
groups of 2 & 3
 Practice testing water
 Practice doing pen chromatograms
 Practice doing juice chromatograms


How to Prepare Students
Practice identifying fingerprints
 Practice matching DNA
chromatograms/electropherograms
 Practice matching shoes & tires to their
tracks
 Try a liquid spatter activity
 Practice using a waste container


Resources
The National SO Website www.soinc.org
 http://mypage.iu.edu/~lwoz/socrime/index
.htm


Questions?
Thank

You